FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
A SYSTEM FOR CARDIAC ACTIVITY MONITORING
(a)TATA CONSULTANCY SERVICES LTD.,
an Indian Company of Nirmal Building, 9th Floor, Nariman Point, Mumbai - 400 021,
Maharashtra, India;
and
(b) INDIAN INSTITUTE OF TECHNOLOGY, BOMBAY
an Indian Institute of Powai, Mumbai 400 076, Maharashtra, India.
The following specification particularly describes the invention and the manner in which
it is to be performed

FIELD OF THE INVENTION
This invention relates to electronic medical devices. Particularly, this invention relates to cardiac devices.
DEFINITIONS OF TERMS USED IN THE SPECIFICATION
The term 'external devices' in this specification relates to devices including desktop computers, laptops, palmtops. PDAs, notebooks and the like electronic communication cum processing devices.
The term 'Physiological signal' in this specification relates to signals which are measured and acquired from a user body for monitoring the health of the user. For instance, the physiological signals may include Electrocardiogram (ECG) signals and motion signals of the user.
BACKGROUND OF THE INVENTION AND PRIOR ART
Health of an individual as a whole is a direct function of the health of the organs in part.
Coronary heart diseases are the most frequent cause of death. Cardiac deaths are usually characterized by sudden cardiac arrest and with less chances of resuscitation. Some of these catastrophic cardiac events include ventricular flutter, ventricular fibrillation, extreme Bradycardia and acute myocardial infarction. It is necessary to provide quick medical assistance to patients with these life threatening health risks.
Generally, an individual's prime contact to the physician happens before or during or after a heart attack occurs. Unless the individual patient happens to have some arrhythmia or complains of chest pain, dizziness or associated cardiac symptoms, the individual's physician will not have any clue of the developing heart trouble. During regular medical examination, the physician typically takes only 10 seconds to 5 minutes of the patient's ECG in an attempt to capture these events.
Often, there is a need felt by the physician to be able to capture these events at the time of its occurrence on the patient. Later, the physician can decide to view the trace from

his/her mobile, PDA, PC or obtain a print of the trace directly from a suitable device built for this purpose.
Various types of apparatuses have been developed and available in the market to monitor individuals' cardiac status outside hospital and during their stressful environment work. However, present wearable apparatus are bulky in size, some devices record and store alone or record only. To monitor the individual's cardiac status under stress condition, individuals have to under go examination in limited environment range with respect to base station.
There have been attempts in the prior art to provide various monitoring systems to monitor and record the cardiac status of individuals. United States Patent Application 20090326339 discloses a wearable healthcare device which includes a plurality of sensors for sensing physiological parameters of a person. The sensed parameters are classified using a pre-trained classifier to determine if the analyzed parameters indicate an occurrence of an emergent condition. However, this disclosure employs specialized means like a classifier to determine an emergent condition which require adequate training to determine an emergent situation. Also, the disclosure does not perform filtration of the captured physiological signals to eliminate false emergent situation alarms.
Also, Chinese Patent Application 101474068A discloses a portable wireless ECG monitoring device which requires low power consumption and is wearable by the user. The patent application also discloses that the device can be easily attachable to the human body for collecting the ECG signals, amplifying them and wirelessly transmitting them to a PC, PDA or mobile phone using any of the communication protocol. The processed ECG signals can further be transmitted using GPRS/ WiFi to an equipment or a remote expert system. However, this disclosure as well does not perform the filtration of the captured signals. As well as, the transmitted signals are not displayed in customized formats for easy inference of the doctor/physician.
Thus, there is felt a need for a system which can:

o accurately and in real-time diagnose occurrence of an emergency;
o provide information on the state/ activity of a patient;
o provide an instant therapeutic plan to avoid the occurrence of an emergent
situation; and o provide an intelligent display of the measured physiological signals in various
customized formats for easy reference and analysis of the condition of a patient.
OBJECT OF THE INVENTION
An object of the invention is to monitor cardiac events in a continuous and real-time fashion.
Another object of the invention is to provide a device for cardiac monitoring which is wearable by a user.
Yet another object of the invention is to provide a device For cardiac monitoring which is less bulky.
Still another object of the invention is to provide a device for monitoring user's motion status.
An additional object of the invention is to provide real-time diagnosis to an individual relating to his/her cardiac activity or aberration in cardiac activity.
Yet another additional object of the invention is to provide a real-time therapeutic plan to an individual relating to his/her cardiac activity or aberration in cardiac activity.
SUMMARY OF THE INVENTION
The present invention envisages a system for cardiac activity monitoring comprising: o a remote web server having:
■ a first repository to store user details including user credentials, unique device identification number, physician details and course of treatment;

■ command issuance means adapted to issue commands including a lead selection command, a initiate command and a halt command;
■ receiving means adapted to receive ECG (electrocardiograph) readings and ambulatory readings corresponding to a user and a unique device identification number;
■ a second repository adapted to store the ECG and ambulatory readings for the user and the unique device identification number;
■ a first intelligent reading means adapted to receive, process and display ECG readings and ambulatory readings in a customized format; and
■ interfacing means adapted to provide a plurality of diverse communication channels to interface with remote devices;
o remote communication devices co-operating with the remote web server having:
■ receiving means to receive ECG readings, ambulatory readings and notifications;
■ a second intelligent reading means adapted to receive, process and display ECG readings and ambulatory readings in a customized format; and
■ transmission means adapted to transmit ECG readings and ambulatory readings to the remote web server;
o wearable cardiac activity monitoring devices co-operating with the remote web server and predetermined remote communication devices, the wearable cardiac activity monitoring devices being assigned an identifiable unique identification number, the cardiac activity monitoring device having:
■ a plurality of leads adapted to make contact at various predetermined points on a user's body to measure physiological signals at those points and further adapted to provide an ECG reading;
■ ambulatory monitoring means adapted to monitor and record a user's physical movement data and further adapted to provide ambulatory readings;

■ a user interface adapted to enable a user to select at least one mode
of operation for the wearable cardiac activity monitoring device from
a set of predefined modes of operation, the user interface having:
a) display means adapted to display the set of predefined modes of operation in a predetermined format and further adapted to display a status for a selected mode of operation; and
b) first sensing means adapted to sense a selection of a mode of operation by a user and further adapted to provide a sensed signal;
■ processing means co-operating with the plurality of leads, the
ambulatory monitoring means and the user interface having:
a) a plurality of units selected from the group of units consisting of:
a. a monitoring unit having:
i. second sensing means adapted to sense commands and further adapted to provide a sensed command; ii, lead selection means adapted to receive the sensed command and further select at least three predetermined leads from the plurality of leads to obtain ECG readings and still further adapted to select predetermined leads from the plurality of leads to obtain ECG readings, in the event that the sensed command includes specific lead selection instructions; iii. acquisition means adapted to acquire ECG readings from selected leads and ambulatory readings from the ambulatory monitoring means and further adapted to provide acquired readings; and

iv. second transmission means adapted to transmit the acquired readings in the event that the sensed command is a initiate command and further adapted to halt the transmission in the event that the sensed command is a halt command;
b. a recording unit co-operating with the monitoring unit
and adapted to receive the acquired readings, the
recording unit having:
i. memory interfacing means adapted to provide an input port to receive a detachable memory device;
ii. detection means adapted to detect the presence of the detachable memory device on the input port and further adapted to raise a detection signal, wherein the detection signal confirms the presence of the detachable memory device; and
iii. storage facilitation means adapted to facilitate storing of the acquired readings on to the detachable memory device on receiving the detection signal;
c. an external device communication unit co-operating
with the monitoring unit having:
i. interconnection means adapted to interconnect
the wearable cardiac activity monitoring device
with an external device;
ii. relaying means adapted to relay acquired signals
in real time to the external device using serial
communication; and

iii. a third intelligent reading means adapted to
receive, process and display ECG readings and
ambulatory readings in a customized format;
d. a desktop sharing unit co-operating with the external device communication unit adapted to enable the external device to share a customized display of ECG readings and the ambulatory readings via a remote desktop sharing ility;
b) interpretation means adapted to receive and interpret the sensed signal and further adapted to provide an interpreted signal;
c) selection means adapted to select at least one or a combination of the units based on the interpreted signal; and
d) a decision and alert generation unit co-operating with the monitoring unit adapted to analyze the acquired signals and generate an alert in the event that premonitory and catastrophic arrhythmias are analyzed in the acquired signals.
Typically, the transmission means transmits the readings to the remote web server using wireless communication protocols selected from the group of protocols consisting of Bluetooth, GPRS and ZigBee.
Preferably, the remote communication device can be selected from the group of communication devices consisting of a mobile phone, a personal digital assistant, a laptop, a desktop and a palmtop.
Further, the second transmission means is adapted to transmit the acquired signals to the remote communication device using communication protocols selected from the group of protocols consisting of Bluetooth, ZigBee, Infrared and Voice Codec.
Furthermore, the second transmission means is adapted to transmit the acquired signal to the remote web server using communication modes selected from the group of modes
consisting of Bluetooth. ZigBee, data link mode, via a modem, serial communication interface and via a remote communication device.
Still further, the serial communication includes ubiquitous serial connection and universal serial bus connection.
In addition, the ambulatory monitoring means includes a 3 axis accelerometer to monitor the physical status of a user.
Additionally, the storage facilitation means is further adapted to facilitate storage of other data in any data format on to the detachable memory device.
Typically, the detachable memory device can be selected from the group of memory devices consisting of flash memory, or a standard computer memory adapted to be connected by means of a serial interface.
The first intelligent reading means, the second intelligent reading means and the third intelligent reading means are adapted to display the ECG readings and the ambulatory readings in segments or in a comparative mode with previous or pre-defined modes. Moreover, the first intelligent reading means, the second intelligent reading means and the third intelligent reading means are further adapted to subject the readings to various signal processing functions selected from the group of signal processing functions consisting of waveform transform functions, Fourier transform functions, delay functions, noise filtering functions, spectrum plotting functions, high-pass filtering functions, low-pass filtering functions, notch filter functions and state space representation functions.
In accordance with the present invention, the analysis and alert generation unit includes: o analysis means adapted to receive and analyze the acquired signals; and o alert generation means co-operating with the analysis means adapted to generate an alert in the event that premonitory and catastrophic arrhythmias are analyzed in the acquired signals.
Preferably, the remote web server includes a decision support system having therapeutic plan generation means adapted to automatically generate a therapeutic plan based on the

ECG readings and the ambulatory readings and further adapted to relay the plan to the wearable cardiac activity monitoring device.
Typically, the device includes filtration means adapted to remove motion artifact from the acquired ECG signal.
In accordance with the present invention, there is provided a wearable cardiac activity monitoring device comprising:
o an analog operation unit having:
■ a signal acquisition node adapted to acquire a plurality of physiological signals using measuring devices selected from the group of measuring devices consisting of ECG (Electrocardiogram) electrodes and temperature sensors and further adapted to provide acquired physiological signals;
■ a set of input amplifiers adapted to receive and enhance the strengths of the acquired physiological signals;
■ a Calibration Pulse Generator adapted to generate reference waveform for selection of the ECG electrodes;
■ at least two Lead Selector Switches adapted to simultaneously select required ECG electrodes;
■ an accelerometer adapted to detect human movement or motion;
■ programmable amplifiers adapted to program the gain of an amplifier to enhance strength of the acquired physiological signals selected by the lead selector switches; and
■ programmable filters adapted to filter out-of-band noise rejection from the acquired physiological signals;
o a digital operation unit co-operating with the analog operation unit having:
■ a set of user switches adapted to select a mode of operation for the wearable cardiac activity monitoring device;
■ LED Indicators adapted to indicate the current mode of operation;
■ a voltage regulator adapted to maintain constant voltage level in the digital operation unit and the analog operation unit;

■ a set of power switches adapted control the supply of power to the wearable cardiac activity monitoring device;
■ at least one rechargeable battery to power the wearable cardiac activity monitoring device;
■ a battery charger adapted to charge the batteries;
■ a SD Card Driver adapted to provide SD card interface;
■ Micro SD Card adapted to receive and support Micro SD card;
■ at least one microcontroller embedded with an application adapted to control the operations of the analog operation unit and digital operation unit;
o a communication unit co-operating with the microcontroller having:
■ a Bluetooth transceiver adapted to transmit data to external devices;
■ a IrDA encoder decoder and transceiver adapted to encode, decode and transmit data over infrared light using (IrDA) based Infrared Data Association communications protocol standard; and
■ a voice codec adapted to record and transmit voice recordings.
Preferably, the mode of operation and/or ON/OFF status of the device is selected by the human movement detected by the accelerometer.
According to this invention, the input amplifiers are low noise and low-power analog amplifiers. And, the SD card driver is further adapted to provide standard programming functions for FAT16 and FAT32 formatted memory cards.
Typically, the battery charger is further adapted to receive power automatically on detection of a USB connection and still further adapted to use dynamic power path management to recharge batteries.
The present invention envisages a method for monitoring cardiac activity for users, the method comprising the following steps:
o creating a first repository to store user details including user credentials, unique device identification number, physician details and course of treatment;

o providing a remote web server for issuing commands including a lead selection
command and a initiate command to receive ECG (electrocardiograph) reading
and ambulatory readings from a wearable cardiac monitoring device;
o sensing issued commands and initiating a lead selection and signal monitoring
process;
o measuring physiological signals and motion data at the wearable cardiac
monitoring device;
o transmitting the physiological signals in the form of ECG readings and motion
data in the form of ambulatory readings from the wearable cardiac monitoring
device;
o receiving the ECG readings and the ambulatory readings corresponding to a user
and a unique device identification number at the remote web server;
o issuing a halt command to the wearable cardiac monitoring device to stop the
reception of the ECG readings and the ambulatory readings;
o storing the ECG readings and the ambulatory readings in a second repository for
the user and the unique device identification number;
o viewing the ECG readings and the ambulatory readings in a customized format;
o analyzing the ECG readings and the ambulatory readings; and
o generating an alert in the event that premonitory and catastrophic arrhythmias are
analyzed.
In accordance with this invention, the step of sensing issued commands includes the steps of:
o interpreting the issued command; and
o selecting required number of ECG electrodes for measuring physiological signals.
In addition, the step of measuring physiological signals and motion data includes the
steps of:
o acquiring measured physiological signals from selected ECG electrodes;
o amplifying strength of the acquired physiological signals; and
o filtering the acquired physiological signals to remove noise and motion artifact.

Still further, the step of transmitting the physiological signals includes the step of transmitting the physiological signal to a remote communication device via Bluetooth communication protocol / Voice Codec / Infrared.
Additionally, the step of transmitting the physiological signals includes the step of transmitting the physiological signal from the remote communication device to the remote web server using communication protocols including Bluetooth. ZigBee and GPRS.
Furthermore, the step of transmitting the physiological signals includes the step of transmitting the physiological signal to the remote web server using communication interfaces including serial communication interface, Bluetooth, USB interface, data link interface and data modem.
Typically, the step of viewing the ECG readings and the ambulatory readings in a customized format includes the step of displaying the readings in segments / displaying the readings in comparative mode with previous or pre-defined modes.

Preferably, the method further includes the following steps:
o selecting an operative mode on the wearable cardiac activity monitoring
device;
o sensing the selected operative mode; and
o performing a predetermined operation based on the selected operative mode.
In accordance with one aspect of this invention, the step of performing a predetermined operation includes the steps of acquiring and recording the ECG readings and the ambulatory readings on to a detachable memory device.
In accordance with another aspect of this invention, the step of performing a predetermined operation includes the steps of storing other data of any data format on to a detachable memory device.

In accordance with yet another aspect of this invention, the step of performing a predetermined operation includes the steps of interfacing the wearable cardiac activity monitoring device with an external device using serial communication interface, acquiring the ECG readings and the ambulatory readings and displaying the ECG readings and the ambulatory readings in a customized format on the external device.
In accordance with still another aspect of this invention, the step of performing a predetermined operation includes the steps of interfacing the wearable cardiac activity monitoring device with an external device using serial communication interface, acquiring the ECG readings and the ambulatory readings, displaying the ECG readings and the ambulatory readings in a customized format on the external device, activating a desktop sharing application on the external device and a remote desktop / computer to connect to the external device and displaying the ECG readings and the ambulatory readings in a customized format on the remote desktop / computer.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The present invention will now be described with references to the accompanying drawings, in which:
FIGURE 1 illustrates a schematic of the system for cardiac activity monitoring in accordance with the present invention;
FIGURE 2 illustrates a block diagram representation of the desktop sharing mode of operation of the system in accordance with the present invention;
FIGURE 3 illustrates a block diagram representation of one of the modes for recording data followed by the device in accordance with the present invention;
FIGURE 4 illustrates a circuit diagram of the analog section of the device in accordance with the present invention;

FIGURE 5 illustrates a block diagram representation of one of the modes of communication of the device with a remote server in accordance with the present invention;
FIGURE 6 illustrates a circuit diagram of the digital section of the device in accordance with the present invention;
FIGURE 7 illustrates a block diagram representation of the communication of measured cardiac signals using Bluetooth mode to various remote communication devices in accordance with the present invention;
FIGURE 8 illustrates a schematic block diagram of the communication unit of the device in accordance with the present invention; and
FIGURE 9 is a flowchart showing the steps involved in monitoring cardiac activity for users in accordance with the present invention.
DETAILED DESCRIPTION
The system for cardiac activity monitoring will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
According to this invention, there is provided a cardiac activity monitoring system. The system includes a web server, remote communication devices and cardiac activity monitoring devices. The web server requests, receives, processes, displays and stores cardiac readings received from the cardiac activity monitoring devices.
In accordance with one aspect of the present invention, the cardiac activity monitoring device communicates with predetermined remote communication devices and the web server, the cardiac activity monitoring device being wearable by a user. In accordance with one embodiment of this invention, a plurality of leads are provided, typically 5 leads, for sensing cardiac activity by measuring electric potential at various points of the body where the leads are in contact. Typically, these 5 leads are placed in accordance

with a pre-defined pattern such that the device may function as a 3-lead clinical monitoring device and by suitable configuration, it may function as a 12-lead ECG recorder.
In accordance with another embodiment of this invention, the cardiac activity monitoring device is adapted to transmit the recorded ECG readings to a remote communication device carried by a physician or a doctor. The transmission from the cardiac activity monitoring device to the remote communication device may be performed based on the Bluetooth, Zigbee, or the like wireless communication methods. The remote communication device carried by a physician or a doctor may include a display for receiving and viewing ECG readings. The remote communication devices may include a mobile phone, a personal digital assistant, a laptop, a desktop, a palmtop or the like.
In accordance with yet another embodiment of this invention there is provided an ambulatory monitoring means in the cardiac activity monitoring device. Typically, the ambulatory monitoring means may include a 3-axis accelerometer for monitoring the physical status of a user. Therefore, the cardiac activity monitoring device is adapted to function as a Holter system. The ambulatory monitoring means records and stores the individual's physical (movement) status and cardiac status. This ambulatory data clubbed with ECG readings would help the physician or doctor in a better prognosis of the heart condition of the user.
In accordance with still another embodiment of this invention, there is provided a recording unit in the cardiac activity monitoring device to store the ECG readings as well as the ambulatory readings. The storage may include a flash memory, or a standard computer memory adapted to be connected to the mentioned cardiac activity monitoring device by means of a serial interface like RS232 and USB.
The web server communicates to the cardiac activity monitoring device via a data link mode or a modem, mobile phone adapted for communication with the cardiac activity monitoring device and the like.

In accordance with an additional embodiment of this invention, there is provided an intelligent device reading means which is embedded on a viewing means for viewing the ECG readings and the ambulatory readings in a customized manner, typically in segments or in a comparative mode with previous or pre-defined modes or subject the readings to various signal processing parameters or waveform transform functions such as Fourier transform, delay functions, noise filtering circuits, spectrum plots, high-pass filters, low-pass filters, notch filters to remove specific frequency noise, state space representation and the like to observe linear dynamics as well as study the non-linear dynamical analysis for predictive purposes.
Further, the web server includes a decision support system for providing a therapeutic plan without a physician's or a doctor's intervention and relay the same to the device worn by the user.
FIGURE 1 illustrates a schematic of the system 100. The system 100 includes a remote web server 102, remote communication devices 120 and wearable cardiac activity monitoring devices 128. The remote web server 102 includes a first repository 104 to store user details including user credentials, unique device identification number, physician details and course of treatment. This information is useful for interlinking the cardiac activity measuring device 128 with a particular user and the user records for quick and easy retrieval in case of any emergency.
The remote web server 102 is embedded with a specialized application and thus, can request for ECG signals from one of the cardiac activity measuring devices 128 by issuing commands to it. The command issuance means 106 aids the web server 102 to issue commands including a lead selection command, an initiate command and a halt command, these commands enable the web server 102 to select particular leads / electrodes for the purpose of acquiring the ECG signals, begin the transmission of the signals or stop the transmission respectively.
On issuance of the initiate command from the web server 102, the cardiac activity measuring device begins to transmit the ECG readings and ambulatory readings to the

web server 102. The readings are received by the web server 102 either directly through the cardiac activity monitoring device 128 using communication methods including serial connectivity, Bluetooth, Zigbee, data link mode and modem or via the remote communication device 120.
The receiving means 108 of the remote web server 102 receives the ECG (electrocardiograph) readings and ambulatory readings corresponding to selected user and associated unique device identification number. These readings are stored in a second repository 110 for the user and his/her unique device identification number combination. Also, the web server 102 includes first intelligent reading means 112 to receive, process and display ECG readings and ambulatory readings in a customized format. The customized format includes displaying the readings in segments or in a comparative mode with previous readings. The first intelligent reading means 112 may also subject the readings to various signal processing functions to display the processed readings in various modes or formats to enable the physician to perform analysis on the readings. The readings can be subject to waveform transform functions, Fourier transform functions, delay functions, noise filtering functions, spectrum plotting functions, high-pass filtering functions, low-pass filtering functions, notch filter functions and state space representation functions to observe linear dynamics as well as study the non-linear dynamical analysis for predictive purposes.
Additionally, the web server 102 includes interfacing means 114 to provide a plurality of diverse communication channels to interface with remote devices. The communication channels include wired and wireless channels. The wired channels are the serial interface channels having the ubiquitous serial interface, USB, data link or modem. The wireless channels include GPRS, Voice, Bluetooth, Zigbee, Infrared and GSM/CDMA communication channels.
Further, the remote web server 102 includes a decision support system 118 having therapeutic plan generation means (not shown in the figures) to automatically generate a therapeutic plan based on the ECG readings and the ambulatory readings and further relay the plan to the wearable cardiac activity monitoring device 128 without the

intervention of the physician. The decision support system 118 also generates alarms for the concerned physicians on their remote communication devices 120 in case of an emergency based on the details available in the first repository 104. The emergency alarm includes the patient's current readings and the current course of treatment.
The remote communication devices 120 associated with the doctors and physicians are adapted to receive the ECG and ambulatory readings from the cardiac activity monitoring device 128 via receiving means 122. The remote communication devices 120 are adapted to include second intelligent reading means 124 to receive process and display ECG readings and ambulatory readings in a customized format, similar to first intelligent reading means 112. Additionally, remote communication devices 120 are adapted to include a transmission means 126 to transmit ECG readings and ambulatory readings to the remote web server 102. Also, the remote communication devices 120 are adapted to receive emergency notifications including patient details, treatment course advised to the patient and the like details to alert the physician of an emergency.
The remote communication devices 120 are adapted to act as intermediate devices between the cardiac activity monitoring devices 128 and the remote web server 102. In one embodiment of the present invention, the remote communication devices 120 are adapted to transmit the ECG readings and ambulatory readings to the remote web server 102 using wireless communication protocols selected from the group of protocols consisting of Bluetooth, GPRS and ZigBee.
The wearable cardiac activity monitoring devices 128 co-operate with both the remote web server 102 and predetermined remote communication devices 120, that is, the remote communication devices 120 associated with the physician/doctor treating or monitoring the cardiac status of the patient connected to a particular wearable cardiac activity monitoring device 128.
In accordance with the present invention, the wearable cardiac activity monitoring devices 128 are assigned an identifiable unique identification number. The cardiac activity monitoring device 128 comprise the following components:

• a plurality of leads 1301 to 130n which make contact at various predetermined points in a predetermined pattern on a user's body to measure physiological signals at those points and further adapted to provide an ECG reading;
• ambulatory monitoring means 132 to monitor and record a user's physical movement data and further provide ambulatory readings;
• a user interface 134 to enable a user to select at least one mode of operation for the wearable cardiac activity monitoring device from a set of predefined modes of operation, the user interface 134 includes display means 136 which is displays a set of predefined modes of operation in a predetermined format and further displays a status for a selected mode of operation. For instance, if the selected mode of operation is the monitoring mode, then while the ECG and ambulatory readings are being transmitted to the remote server 102 the status will be seen as, for example 'transmission in process' and a corresponding LED will be turned ON to indicate the same. Additionally, the user interface 134 includes first sensing means 138 to sense a selection of a mode of operation by a user and further provide a sensed signal. This sensed signal is sent to the processing means 140.
• The processing means 140 co-operates with the plurality of leads 1301 to 130n, the ambulatory monitoring means 132 and the user interface 134 and in turn includes the following components:
o a plurality of units 142 selected from the group of units consisting of: ■ a monitoring unit 144 having:
a) second sensing means 146 which senses the commands issued by the remote web server 102 or an external device and further provides a sensed command;
b) lead selection means 148 receives the sensed command and further selects at least three predetermined leads from the plurality of leads to obtain ECG readings and still further selects predetermined leads from the plurality of leads to obtain ECG readings, in the event that the sensed command includes specific lead selection instructions;

c) acquisition means 150 to acquire ECG readings from selected leads and ambulatory readings from the ambulatory monitoring means and further provide acquired readings; and
d) second transmission means 152 to transmit the acquired readings in the event that the sensed command is a initiate command and further halt the transmission in the event that the sensed command is a halt command;
■ a recording unit 154 co-operating with the monitoring unit 144
receives the acquired readings, the recording unit includes:
a) memory interfacing means 156 to provide an input port to receive a detachable memory device. The detachable memory device can be selected from the group of memory devices consisting of flash memory, or a standard computer memory adapted to be connected by means of a serial interface:
b) detection means 158 detects the presence of the detachable memory device on the input port and further raises a detection signal, wherein the detection signal confirms the presence of the detachable memory device; and
c) storage facilitation means 160 to facilitate storing of the acquired readings on to the detachable memory device on receiving the detection signal;
■ an external device communication unit 162 co-operating with the
monitoring unit 144 having:
a) interconnection means 164 to interconnect the wearable cardiac activity monitoring device with an external device;
b) relaying means 166 to relay acquired signals in real time to the external device using serial communication; and
c) a third intelligent reading means 168 to receive, process and display ECG readings and ambulatory readings in a customized format on the external device;

■ a desktop sharing unit 170 co-operating with the external device communication unit 162 to enable the external device to share a customized display of ECG readings and the ambulatory readings via a remote desktop sharing utility; o for selection of an appropriate unit the processing means 140 includes interpretation means 172 which receives and interprets the sensed signal from the user interface 134 and provides an interpreted signal; o selection means 174 included in the processing means 140 selects at least one or a combination of the units based on the interpreted signal and accordingly activates one of the aforementioned units; o the processing means 140 also incorporates a decision and alert generation unit 176 which co-operates with the monitoring unit 144 and analyzes the acquired signals and generates an alert in the event that premonitory and catastrophic arrhythmias are analyzed in the acquired signals. The decision and alert generation unit 176 includes analysis means (not shown in the Figure) to receive and analyze the acquired signals and alert generation means (not shown in the Figure) to generate an alert in the event that premonitory and catastrophic arrhythmias are analyzed in the acquired signals.
Additionally, the device 128 includes filtration means (not shown in the Figure) to remove motion artifact from the acquired ECG signal to ensure that the motion artifact present in the acquired ECG signal does not lead to false alarm and false detection of emergency situations.
The following steps describe a typical working scenario of the system of this invention and the various modes in which the cardiac activity monitoring device 128 can be operated:
1. The cardiac activity monitoring device 128, hereinafter referred to as the 'device' can be used to monitor real time ECG data and transmit the ECG readings using Bluetooth mode to a remote communication device 120 / remote web server 102 / remote computer 200 as seen in FIGURE 2:

• the remote web server 102 may have a Bluetooth synchronization software installed to establish a transparent serial connection with the device 128;
• a special application embedded on the remote web server 102 requests for online ECG data from the device 128 by issuing a start command;
• the serial command is interpreted by the device 128 and it continuously transmits the ECG to the remote web server 102 till a stop command is sent by the remote web server 102; and
• the data so obtained is plotted as ECG trace on the first intelligent reading means 112 specially designed for this purpose. The requests can also include lead selection commands to select specific leads for acquiring the ECG data.
2. The device 128 can be used in Recorder mode as seen in FIGURE 3:
• in this mode a Micro SD card is placed in the device 128;
• the device mode 128 is selected as the recorder mode and the status is updated accordingly;
• in recorder mode, the device acquires and stores typically the three lead ECG trace and three-axis accelerometer data on this memory card in a File Allocation Table (FAT 16) file format; and
• the files are later viewable on the intelligent reading means. Standard card readers which support Secure Digital/ Multimedia Memory Card (SD/MMC) can be used to transfer the ECG data to the computer.

3. In one configuration, the wearable ECG device 128 can be configured to use as a twelve lead ECG recorder.
4. In yet another mode the device 128 can itself function as general storage media, which can store all data format onto a detachable flash memory.
5. In still another mode, serial connectivity to a local computer can be achieved as seen in FIGURE 5:
• the device 128 is selected in the record mode;

• the device 128 is connected to the computer using the USB (Universal Serial Bus) connection or a ubiquitous serial connection (RS232);
• special desktop sharing application/utility for viewing the ECG readings is embedded on the computer which requests for an online ECG data from the device 128 by issuing a start command;
• the serial command is interpreted by the device 128 and continuously transmits the ECG on the serial port till a stop command is sent by the user from the host computer or base station or mobile phone; and
• the data so obtained is plotted as ECG trace on first intelligent reading means 112.
6. In an additional mode, once the ECG traces are received by remote
communication device 120, it will send the ECG trace to a remote server 102/
external device 700 via Bluetooth as seen in FIGURE 7
• special means designed for this purpose are installed on the remote computer which requests for an online ECG data from the device 128 by issuing a start command:
• In one application the device 128 uploads ECG data to a central web server 102. Alternatively, the readings are communicated to a remote communication device 120 via Bluetooth and which relays it to central web server 102 via GPRS or the like.

7. In one application the device 128 communicates to a personal computer which has a desktop sharing utility and ECG intelligent reading means installed on it. A remote PC can then connect to the server using the desktop sharing utility and view the ECG trace using an intelligent reading means.
8. In still another mode the device 128 can transmit the detected rhythm abnormalities to said web server 102:
• in this mode, the device 128 is set in Hotter mode;

• Once a rhythm abnormality is detected, the device uploads the ECG data to a remote communication device 120. Data is transmitted to the remote web server 102 from the remote communication device 120;
• The traces are stored in the second repository 110 on this server 102 for later retrieval
• As the events are stored in the second repository 110 they can be viewed by the cardiologist without the need for further Holter analysis.
FIGURE 4 illustrates a circuit diagram of the analog section of the cardiac activity device. The blocks are explained below:
Signal acquisition node 400: A node 400 to acquire a plurality of physiological signals using measuring devices selected from the group of measuring devices consisting of ECG (Electrocardiogram) electrodes/leads and temperature sensors. The acquired physiological signals are given to the input amplifier 402.
Input Amplifier 402: Physiological signals are of low signal amplitudes. Low noise and low-power analog amplifiers are used to enhance the strengths of bio-potentials picked by electrode wires for post-processing purposes.
Calibration Pulse Generator 404: This is used to generate a rectangular voltage pulse of lmV; which is passed through the analog amplifiers and filters. Calibration pulses are useful as reference waveform for comparison of patient ECG's duration and amplitude.
Lead Selector Switch 406-1 and 406-2: The precision analog switches are used to select the required leads, to reconfigure the cardiac activity monitoring device. The cardiac activity monitoring device shall acquire three ECG leads simultaneously. Lead selection switch reconfigure the cardiac activity monitoring device to measure up to 121eads
3Axis Accelerometer 414: It is used for detecting human movement or motion. Hence it helps in processing ECG readings reliably to avoid false alarms such as due to arrhythmia, event detection, detecting motion artifacts and the like scenarios.

Programmable Amplifiers 412: The gain of the amplifiers can be programmed as required. Full gain (gain=900) and half gain (gain=500) are possible.
Programmable Filters 410: The bandpass filters are used for out-of-band noise rejection from the acquired bio-potentials where the corner frequencies are programmable. 0.5Hz-35Hz and 0.05Hz-106Hz are two possible bandwidth options useful as holter mode and bed-side operation of the device.
FIGURE 6 illustrates a circuit diagram of the digital section of the cardiac activity monitoring device. The blocks are explained below:
Microcontroller 600: Microcontroller embedded with an application adapted to control the operations of the analog operation unit and digital operation unit. The microcontroller 600 issues the lead selection signals as well as controls the programmable amplifier and filter. Additionally, the microcontroller 600 receives and processes the amplified and filtered acquired signals.
User Switches 602: Switches are used to select device modes and operations, such as for online transmission, SD record, stop, and system reset functions.
LED Indicators 604: Light-emitting-diode (LED) based indicators are used to display the operating mode for easy operators' interface.
Voltage Regulator 608: This is an electronic circuit which maintains a constant voltage level at power pins. Low Drop Out (LDO) and low quiescent current voltage regulators are utilized for analog, digital and communication sections. The microcontroller has the ON/OFF control over regulators separately for hardware power management.
Power Switches 610: A miniature and sliding toggle switch is placed to control the battery power of the system by the user.
Battery charger 606: This is used to charge the lithium ion/polymer batteries. The battery charger automatically receives the power from USB when a USB is connected and uses dynamic power path management to recharge batteries.

SD Card Driver 612: SD card driver provides standard programming functions, typically for FAT16 and FAT32 formatted cards, which adds USB based SD card interface to applications.
Micro SD Card 6l4: These are SD Cards that have a smaller physical size as compared to normal SD card and supports standard SD format of data access.
FIGURE 8 illustrates a schematic block diagram of the communication unit of the cardiac activity monitoring device. The blocks are explained below:
Bluetooth Transceiver 800: This is used to transmit data to the personal computer, base station or mobile phone. The Serial Port Profile (SPP) is used to transfer data over the wireless Bluetooth link.
IrDA Encoder-Decoder & Transceiver 802: This block encodes and decodes the IrDA where Infrared Data Association (IrDA) defines physical specifications communications protocol standards for the short-range exchange of data over infrared light
Voice Codec 804: A voice codec is an audio codec optimized for voice recordings. They are usually lossy as an exact recording is usually not necessary.
In accordance with this invention, the mode of operation of the device 128 or ON/OFF status can be selected / controlled by tapping and or shaking the device. The accelerometer 414 incorporated in the device captures the mechanical vibration and motion generated by the above user actions and passes it to the microcontroller 600 to perform the intended operation.
In accordance with the present invention, there is provided a method for monitoring cardiac activity for users, the method comprising the following steps as seen in FIGURE 9:

o creating a first repository to store user details including user credentials,
unique device identification number, physician details and course of
treatment, 1000; o providing a remote web server for issuing commands including a lead
selection command and a initiate command to receive ECG
(electrocardiograph) reading and ambulatory readings from a wearable cardiac
monitoring device, 1002; o sensing issued commands and initiating a lead selection and signal monitoring
process, 1004; o measuring physiological signals and motion data at the wearable cardiac
monitoring device. 1006; o transmitting the physiological signals in the form of ECG readings and motion
data in the form of ambulatory readings from the wearable cardiac monitoring
device, 1008; o receiving the ECG readings and the ambulatory readings corresponding to a
user and a unique device identification number at the remote web server,
1010; o issuing a halt command to the wearable cardiac monitoring device to stop the
reception of the ECG readings and the ambulatory readings, 1012; o storing the ECG readings and the ambulatory readings in a second repository
for the user and the unique device identification number, 1014; o viewing the ECG readings and the ambulatory readings in a customized
format, 1016; o analyzing the ECG readings and the ambulatory readings, 1018; and o generating an alert in the event that premonitory and catastrophic arrhythmias
are analyzed, 1020,
Additionally, the method comprising the following steps:
o selecting an operative mode on the wearable cardiac activity monitoring
device; o sensing the selected operative mode; and

o performing a predetermined operation based on the selected operative mode.
TECHNICAL ADVANTAGES
The technical advantages of the present invention include in providing a cardiac activity monitoring with individuals ambulatory status monitoring system.
The cardiac activity monitoring device proposed by the present invention can be easily worn by a user. The cardiac activity monitoring device is a self contained device which includes components for measuring of cardiac signals and motion, processing of the measured signals followed by display of the signals along with a therapeutic plan based on the measured signals and a communication unit, all in a single device. Additionally, the device can record, store and transmit the captured processed signals. The device provides varied ways of communication. In accordance with one aspect of the present invention, the device can communicate directly with a web server, or communicate with a web server through a mobile communication device. Alternatively, the device can communicate with an external communication device using serial connectivity.
The key advantage of the device is that despite the high speed of operation, real-time processing and communication capabilities, the device comes in a portable size. Also, due to its portability the device can be continuously worn with ease.
The device can record both cardiac signals and motion status of the user and processes the signals before sending it to either a physician's communication device or a remote computer for prognosis. The processing enables the captured signals to be transmitted and further displayed in a customized format.
The client device includes leads which are connected to the device and placed at predetermined positions on the user. The leads can be selectively activated by the proposed system by means of lead selectors, thus making the client device reconfigurable. Due to the reconfiguration capability, the client device can be adapted to work as a conventional twelve lead ECG (ElectroCardioGraph) to read three lead ECG clinical recorders and monitor.

In accordance with this invention, the physician's mobile communication device is embedded with an intelligent display reading means. The intelligent display reading means subjects the received cardiac and motion signals to various signal processing functions to perform analysis on the signals for easy inference of the physician. Also, the physician can print the ECG trace for further analysis by means of suitable printing device.
The cardiac activity monitoring device can be operated in multiple modes. In one of the modes the cardiac activity monitoring device can work as general storage media, which can store all data format onto a detachable flash memory
In another mode, the cardiac activity monitoring device can be connected to a personal computer or mobile phone or external device and the ECG traces can be viewed online on a personal computer through serial communication through wireless means.
In yet another mode, the system proposes a desktop sharing application which can be activated on the web server and connects to a personal computer which has a desktop sharing utility and ECG viewer software installed on it. A remote personal computer can then connect to the server using the desktop sharing tool and view the ECG trace using the ECG viewer software.
Additionally, the proposed system includes a Decision Support System which enables it to detect and alert premonitory and catastrophic arrhythmias. Also, the wearable cardiac activity monitoring device includes a filtering means which uses the detected motion signals and filters the measured cardiac signals to remove noise and eliminate the false alarms which may be generated coz the motion component in the measured cardiac signals.
Also, the mode of operation of the device or ON/OFF status can be selected / controlled if movement generated by tapping or shaking the device is detected.

Thus, the system for cardiac monitoring along with its components provides an efficient device which can be used for accurately detecting and alarming of premonitory and catastrophic arrhythmias while the user is mobile or performing his/her daily chores.
The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the invention unless there is a statement in the specification to the contrary.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the invention. These and other changes in the preferred embodiment as well as other embodiments of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

WE CLAIM:
1. A system for cardiac activity monitoring comprising: o a remote web server having:
■ a first repository to store user details including user credentials, unique device identification number, physician details and course of treatment;
■ command issuance means adapted to issue commands including a lead selection command, a initiate command and a halt command;
■ receiving means adapted to receive ECG (electrocardiograph) readings and ambulatory readings corresponding to a user and a unique device identification number;
■ a second repository adapted to store said ECG and ambulatory readings for said user and said unique device identification number;
■ a first intelligent reading means adapted to receive, process and display ECG readings and ambulatory readings in a customized format; and
■ interfacing means adapted to provide a plurality of diverse communication channels to interface with remote devices;
o remote communication devices co-operating with said remote web server having:
■ receiving means to receive ECG readings, ambulatory readings and notifications;
■ a second intelligent reading means adapted to receive, process and display ECG readings and ambulatory readings in a customized format; and
■ transmission means adapted to transmit ECG readings and ambulatory readings to said remote web server;
o wearable cardiac activity monitoring devices co-operating with said remote web server and predetermined remote communication devices, said wearable

cardiac activity monitoring devices being assigned an identifiable unique identification number, said cardiac activity monitoring device having:
■ a plurality of leads adapted to make contact at various predetermined points on a user's body to measure physiological signals at those points and further adapted to provide an ECG reading;
■ ambulatory monitoring means adapted to monitor and record a user's physical movement data and further adapted to provide ambulatory readings;
■ a user interface adapted to enable a user to select at least one mode of operation for said wearable cardiac activity monitoring device from a set of predefined modes of operation, said user interface having:

a) display means adapted to display said set of predefined modes of operation in a predetermined format and further adapted to display a status for a selected mode of operation; and
b) first sensing means adapted to sense a selection of a mode of operation by a user and further adapted to provide a sensed signal;
■ processing means co-operating with said plurality of leads, said
ambulatory monitoring means and said user interface having:
a) a plurality of units selected from the group of units consisting of:
i. second sensing means adapted to sense commands and further adapted to provide a sensed command; ii. lead selection means adapted to receive said sensed command and further select at least three predetermined leads from said plurality of leads to obtain ECG readings and still further adapted to select predetermined leads from said plurality

of leads to obtain ECG readings, in the event that said sensed command includes specific lead selection instructions;
iii. acquisition means adapted to acquire ECG readings from selected leads and ambulatory readings from said ambulatory monitoring means and further adapted to provide acquired readings; and
iv. second transmission means adapted to transmit said acquired readings in the event that the sensed command is a initiate command and further adapted to halt the transmission in the event that the sensed command is a halt command;
b. a recording unit co-operating with said monitoring unit
adapted to receive said acquired readings, said
recording unit having:
i. memory interfacing means adapted to provide an input port to receive a detachable memory device; ii. detection means adapted to detect the presence of said detachable memory device on said input port and further adapted to raise a detection signal, wherein the detection signal confirms the presence of the detachable memory device; and iii. storage facilitation means adapted to facilitate storing of said acquired readings on to said detachable memory device on receiving said detection signal;
c. an external device communication unit co-operating
with said monitoring unit having:

i. interconnection means adapted to interconnect said wearable cardiac activity monitoring device with an external device; ii. relaying means adapted to relay acquired signals in real time to said external device using serial communication; and iii. a third intelligent reading means adapted to receive, process and display ECG readings and ambulatory readings in a customized format; d. a desktop sharing unit co-operating with said external device communication unit adapted to enable said external device to share a customized display of ECG readings and said ambulatory readings via a remote desktop sharing utility;
b) interpretation means adapted to receive and interpret said sensed signal and further adapted to provide an interpreted signal;
c) selection means adapted to select at least one or a combination of said units based on said interpreted signal; and
d) a decision and alert generation unit co-operating with said monitoring unit adapted to analyze said acquired signals and generate an alert in the event that premonitory and catastrophic arrhythmias are analyzed in said acquired signals.

2. The system as claimed in claim 1, wherein said transmission means transmits the readings to said remote web server using wireless communication protocols selected from the group of protocols consisting of Bluetooth, GPRS and ZigBee.
3. The system as claimed in claimed in claim 1, wherein said remote communication device can be selected from the group of communication devices consisting of a mobile phone, a personal digital assistant, a laptop, a desktop and a palmtop.

4. The system as claimed in claim 1. wherein said second transmission means is adapted to transmit said acquired signals to said remote communication device using communication protocols selected from the group of protocols consisting of Bluetooth, Infrared and Voice Codec.
5. The, system. as, claimed in. claim. I, whstein said second transmission. means is adapted to transmit said acquired signal to said remote web server using communication modes selected from the group of modes consisting of Bluetooth, data link mode, via a modem, serial communication interface and via a remote communication device.
6. The system as claimed in claim 1, wherein said serial communication includes ubiquitous serial connection and universal serial bus connection,
7. The system as claimed in claim 1, wherein said ambulatory monitoring means includes a three axis accelerometer to monitor the physical status of a user.
8. The system as claimed in claim 1, wherein said storage facilitation means is further adapted to facilitate storage of other data in any data format on to said detachable memory device.
9. The system as claimed in claim 1, wherein said detachable memory device can be selected from the group of memory devices consisting of flash memory, or a standard computer memory adapted to be connected by means of a serial interface.
10. The system as claimed in claim 1, wherein said first intelligent reading means. said second intelligent reading means and said third intelligent reading means are adapted to display said ECG readings and said ambulatory readings in segments or in a comparative mode with previous or pre-defined modes.
11. The system as claimed in claim 1, wherein said first intelligent reading means,
said second intelligent reading means and said third intelligent reading means are

further adapted to subject the readings to various signal processing functions selected from the group of signal processing functions consisting of waveform transform functions. Fourier transform functions, delay functions, noise filtering functions, spectrum plotting functions, high-pass filtering functions, low-pass filtering functions, notch filter functions and state space representation functions.
12. The system as claimed in claim 1, wherein said decision and alert generation unit
includes:
o analysis means adapted to receive and analyze said acquired signals; and
o alert generation means co-operating with said analysis means adapted to
generate an alert in the event that premonitory and catastrophic arrhythmias
are analyzed in said acquired signals.
13. The system as claimed in claim 1, wherein said remote web server includes a decision support system having therapeutic plan generation means adapted to automatically generate a therapeutic plan based on said ECG readings and said ambulatory readings and further adapted to relay said plan to said wearable cardiac activity monitoring device.
14. The system as claimed in claim 1, wherein said wearable cardiac activity monitoring device includes filtration means adapted to remove motion artifact from said acquired ECG signal.
15. A wearable cardiac activity monitoring device as claimed in claim 1 comprising: o an analog operation unit having:

■ a signal acquisition node adapted to acquire a plurality of physiological signals using measuring devices selected from the group of measuring devices consisting of ECG (Electrocardiogram) electrodes and temperature sensors and further adapted to provide acquired physiological signals:
■ a set of input amplifiers adapted to receive and enhance the strengths of said acquired physiological signals;

■ a Calibration Pulse Generator adapted to generate reference waveform for selection of said ECG electrodes;
■ at least two Lead Selector Switches adapted to simultaneously select required ECG electrodes;
■ an accelerometer adapted to detect three axis human movement or motion;
■ programmable amplifiers adapted to program the gain of an amplifier to enhance strength of the acquired physiological signals selected by said lead selector switches; and
■ programmable filters adapted to filter out-of-band noise rejection from the acquired physiological signals;
o a digital operation unit co-operating with said analog operation unit having:
■ a set of user switches adapted to select a mode of operation for said wearable cardiac activity monitoring device;
■ LED Indicators adapted to indicate the current mode of operation;
■ a voltage regulator adapted to maintain constant voltage level in said digital operation unit and said analog operation unit;
■ a set of power switches adapted control the supply of power to said wearable cardiac activity monitoring device;
■ at least one rechargeable battery to power said wearable cardiac activity monitoring device:
■ a battery charger adapted to charge said batteries;
■ a SD Card Driver adapted to provide SD card interface;
■ Micro SD Card adapted to receive and support Micro SD card;
■ at least one microcontroller embedded with an application adapted to control the operations of said analog operation unit and digital operation unit;
o a communication unit co-operating with said microcontroller having:
■ a Bluetooth transceiver adapted to transmit data to external devices;

■ a IrDA encoder decoder and transceiver adapted to encode, decode and transmit data over infrared light using (IrDA) based Infrared Data Association communications protocol standard; and
■ a voice codec adapted to record and transmit voice recordings.

16. The wearable cardiac activity monitoring device as claimed in claim 15, wherein said mode of operation and/or ON/OFF status of said device is selected by said human movement detected by said accelerometer.
17. The wearable cardiac activity monitoring device as claimed in claim 15, wherein said input amplifiers are low noise and low-power analog amplifiers.
18. The wearable cardiac activity monitoring device as claimed in claim 15, wherein said SD card driver is further adapted to provide standard programming functions for FAT 16 and FAT32 formatted memory cards.
19. The wearable cardiac activity monitoring device as claimed in claim 15, wherein said battery charger is further adapted to receive power automatically on detection of a USB connection and still further adapted to use dynamic power path management to recharge batteries.
20. A method for monitoring cardiac activity for users, said method comprising the following steps:
o creating a first repository to store user details including user credentials, unique device identification number, physician details and course of treatment;
o providing a remote web server for issuing commands including a lead selection command and a initiate command to receive ECG (electrocardiograph) reading and ambulatory readings from a wearable cardiac monitoring device;
o sensing issued commands and initiating a lead selection and signal monitoring process;

o measuring physiological signals and motion data at said wearable cardiac
monitoring device;
o transmitting said physiological signals in the form of ECG readings and
motion data in the form of ambulatory readings from said wearable cardiac
monitoring device;
o receiving said ECG readings and said ambulatory readings corresponding to a
user and a unique device identification number at said remote web server;
o issuing a halt command to said wearable cardiac monitoring device to stop the
reception of said ECG readings and said ambulatory readings;
o storing said ECG readings and said ambulatory readings in a second
repository for said user and said unique device identification number;
o viewing said ECG readings and said ambulatory readings in a customized
format; o analyzing said ECG readings and said ambulatory readings; and
o generating an alert in the event that premonitory and catastrophic arrhythmias
are analyzed.
21. The method as claimed in claim 20, wherein the step of sensing issued commands
includes the steps of:
o interpreting the issued command; and
o selecting required number of ECG electrodes for measuring physiological signals.
22. The method as claimed in claim 20, wherein the step of measuring physiological
signals and motion data includes the steps of:
o acquiring measured physiological signals from selected ECG electrodes; o amplifying strength of the acquired physiological signals; and o filtering said acquired physiological signals to remove noise and motion artifact.
23. The method as claimed in claim 20, wherein the step of transmitting said
physiological signals includes the step of transmitting said physiological signal to

a remote communication device via Bluetooth communication protocol / Voice Codec / Infrared.
24. The method as claimed in claim 20, wherein the step of transmitting said physiological signals includes the step of transmitting said physiological signal from said remote communication device to said remote web server using communication protocols including Bluetooth, ZigBee and GPRS.
25. The method as claimed in claim 20, wherein the step of transmitting said physiological signals includes the step of transmitting said physiological signal to said remote web server using communication interfaces including serial communication interface, Bluetooth, USB interface, data link interface and data modem.
26. The method as claimed in claim 20, wherein the step of viewing said ECG readings and said ambulatory readings in a customized format includes the step of displaying the readings in segments / displaying the readings in comparative mode with previous or pre-defined modes.
27. The method as claimed in claim 20, wherein said method further includes the following steps:
o selecting an operative mode on said wearable cardiac activity monitoring
device;
o sensing the selected operative mode; and
o performing a predetermined operation based on said selected operative mode.
28. The method as claimed in claim 27, wherein said step of performing a predetermined operation includes the steps of acquiring and recording said ECG readings and said ambulatory readings on to a detachable memory device.
29. The method as claimed in claim 27, wherein said step of performing a predetermined operation includes the steps of storing other data of any data format on to a detachable memory device.

30. The method as claimed in claim 27, wherein said step of performing a predetermined operation includes the steps of interfacing said wearable cardiac activity monitoring device with an external device using serial communication interface, acquiring said ECG readings and said ambulatory readings and displaying said ECG readings and said ambulatory readings in a customized format on said external device.
31. The method as claimed in claim 27, wherein said step of performing a predetermined operation includes the steps of interfacing said wearable cardiac activity monitoring device with an external device using serial communication interface, acquiring said ECG readings and said ambulatory readings, displaying said ECG readings and said ambulatory readings in a customized format on said external device, activating a desktop sharing application on said external device and a remote desktop / computer to connect to said external device and. displaying said ECG readings and said ambulator)' readings in a customized format on said remote desktop / computer.