Cardiac electrophysiology is referred to as the science of describing, identifying and managing the electrical processes of the heart. The electrical system of the heart generates impulses that regulate the frequency of heartbeats. Electrophysiology studies are conducted to assess various arrhythmias, evaluate irregular electrocardiograms, and design treatments based on the assessment. There are several risks and complications associated with these diagnostic procedures such as heart attack, infection or bleeding, stroke, blood clots in the lungs or legs, and damage to the blood vessels or heart valves. Cardiac electrophysiology is occasionally carried out to estimate the risk of sudden cardiac death. There are various treatments of these conditions, which includes cardioverter-defibrillators, medicines, catheter ablation, pacemakers and other interventions. This book provides comprehensive insights on cardiac electrophysiology. It explores all the important aspects of computational modeling of the heart in the modern day. The readers would gain knowledge that would broaden their perspective in this area of study.