It was done using PYTHON Programming Language using the required libraries. The wavelet transform has emerged over recent years as a powerful time– frequency analysis and signal coding tool favoured for the interrogation of complex non stationary signals. Its application to bio signal processing has been at the forefront of these developments where it has been found particularly useful in the study of these, often problematic, signals: none more so than the ECG. In this review, the emerging role of the wavelet transform in the interrogation of the ECG was discussed in detail.