Abstract
The purpose of the Evaluating ECG capturing using sound-card of PC/Laptop is provided portable and low cost ECG monitoring system using laptop and mobile phones. There is no need to interface microcontroller or any other device to transmit ECG data. This research is based on hardware design, implementation, signal capturing and Evaluation of an ECG processing and analyzing system which attend the physicians in heart disease diagnosis. Some important modification is given in design part to avoid all definitive ECG instrument problems faced in previous designs. Moreover, attenuate power frequency noise and noise that produces from patient's body have required additional developments. The hardware design has basically three units: transduction and conditioning Unit, interfacing unit and data processing unit. The most focusing factor is the ECG signal/data transmits in laptop/PC via microphone pin. The live simulation is possible using SOUNDSCOPE software in PC/Laptop. The software program that is written in MATLAB and LAB-View performs data acquisition (record, stored, filtration) and several tasks such as QRS detection, calculate heart rate.
Highlights
What is an ECG?The Heart is a muscle formed that allows it to act as a pump for blood circulation in a body
Introductory Description of Circuit Design The aim is to design a sensitive amplifier circuit that can detect ECG (Electrocardiogram) signals found from electrodes applied at the left arm (LA), Right arm (RA) and right leg (RL)
The transformations of ECG signal from circuit to laptop via micro-phone jack which is already connected with inbuilt soundcard
Summary
The Heart is a muscle formed that allows it to act as a pump for blood circulation in a body. The heart pumps blood when the muscle cells making up the heart wall contract, generating their action potential. This potential creates electrical currents that spread from the heart throughout a body.The electrical potential between various locations shows differences due to spreading electrical currents in the body. The action potentials generated in SA node stimulates the muscle fibres of the myocardium, causing them to contract. The shortening or tensing of so many muscles at one time creates a mass electrical signal that can be detected by electrodes place on the surface of the patient’s chest This electrical dispatch can be plotted as a function of time and the resultant waveform is known as Electrocardiogram (ECG). Different Methods of ECG Capturing There are various Methods available of ECG capturing and evaluating. 1) ECG Machine 2) Portable ECG Monitor 3) ECG Readout Device 4) PC based ECG system 5) Using sound card of PC
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