The Electrocardiogram (ECG) Signal is a graphical representation of the electromechanical activity of the cardiac system. It is one of the most important physiological parameter, which is being extensively used for knowing the state of cardiac patients. While taking ECG signals, the noises get introduced. It leads to the interference of these noises to important cardiac information. In order to get rid of these noises, an appropriate filter must be designed. This paper provides the design of cascading of IIR Bandpass Zero phase (BP-ZP) Elliptic filter, median filter and Elliptic notch filter. It helps to reduce Low frequency artifacts, High frequency artifacts, Baseline wander and Power line Interference to large extent. This reduction is shown by calculating Power Spectral Density (PSD) of signal before and after implementing above mentioned filters on ECG signal. The results have been concluded using Matlab and MIT-BIH Arrhythmia database.

Key words: ECG, Noises, IIR, PSD, bandpass