ECG Acquisition With Labview Interface

Erny Syahida , Md Shafii (2006) ECG Acquisition With Labview Interface. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The electrocardiogram (ECG) is a recording of the electrical activity of the heart which serves in diagnostic application. The ECG records the electrical activity that results when the heart muscle cells in the atria and ventricles contract. The ECG waveform is analyzed by the cardiologist in diagnosis various disease and condition associated with the heart. The purpose of this project is to develop an ECG amplifier using Instrumentation Amplifier (IA) which have the value gain of at least 1000 (Gain = 1 000). The function of this lA is to amplify the bioelectric signal. The output of the circuit is displayed and recorded on a PC using LABVIEW interface card. Three electrodes are connected to the human body, one on the right arm, one on the left arm and other on the right leg as reference or ground to extract ECG signal from human body. The electrical signal appeared at the ECG input is typically less than lmV and it is essential to amplify the signal amplitude at least 1000 times to have significant voltages for use with the display devices. Normally, the problem of amplification is the signal has a lot of noise interferences which appears at the input from ac power line, arrangement of component and others sources. These interferences have to be overcome. The output signal from ECG amplifier then is interfaced with LABVIEW software for the purpose of display and enabling for further signal processing.

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