Understanding Electrocardiography is both the title and the goal of this book. It is designed for beginners who must start with the fundamentals as well as experienced clinicians who seek a deeper comprehension of the 12-lead ECG and complex arrhythmias. The book presents a thorough explanation of normal heart function and electrophysiology, the genesis, types, and classifications of arrhythmias, interpretation of ECG tracings, utilizing the ECG as a valuable diagnostic tool, electrical safety, anti-arrhythmic therapy, and pacemakers.