Design and Implementation of Ecg Monitoring System

The goal of electrocardiographic (ECG) monitoring in hospital settings have expanded from simple heart rate and basic rhythm determination to the diagnosis of complex arrhythmias, myocardial ischemia, and prolonged QT interval. In this paper a simple 3-lead Electrocardiogram (ECG) monitoring and heart rate measurement system are designed. The proposed system takes the physical pulse input using Bio potential electrodes disposable electrodes of type Ag/AgC1 (silver to silver chloride) because easiness of usage and to eliminate poor connection noise. In the second stage a patient's cable is used to carry the ECG signal from human body to instrumentation amplifier (IA) to reduce the interference. The amplification stage is followed by an analog active filtering stage. Finally, for more simplicity use microphone input of PC sound card has been successfully used as an interfacing card rather than conventional obsolete parallel or serial ports.