Cardiology is a part of medical sciences which deals with the disorders related to heart. There are two sub-divisions of cardiology, namely, adult cardiology which incorporates cardiac electrophysiology, echocardiography, interventional cardiology, nuclear cardiology, etc. and paediatric cardiology which is the study of heart diseases in children and infants. Cardiologists use techniques like electrocardiography (ECG), cardiac stress testing, coronary catheterization, echocardiogram, intravascular ultrasound, etc. to diagnose and treat the diseases. This book provides comprehensive insights into this field and highlights some of its key concepts. It discusses the fundamental and modern approaches of this area. Coherent flow of topics, reader-friendly language and extensive use of case studies from across the globe make this book an invaluable source of knowledge. It will serve as a beneficial guide of reference for students and researchers alike.