ECG is a simple, useful and practical diagnostic test for cardiac diseases. ECG helps physicians to make the correct diagnosis, evaluate myocardial function and monitor the efficacy of treatment.   Now-a-days, a proper clinical diagnosis is impossible without ECG. So, this is a widespread application not only in cardiology but also in other branches of medical sciences.   This book, in short, describes most of the available changes in ECG pattern in different heart ailments along with possible interpretations which are helpful for medical students and practicing physicians.