Cardiac arrhythmias can be life threatening at times. This book discusses the pathophysiology of cardiac arrhythmias. The close mechanisms of cardiac arrhythmias remain unidentified to experts. Genetic researches on ionic modifications, the electrocardiographic characteristics of cardiac rhythm and multiple diagnostic tests have achieved more in the last few years than in the history of cardiology. Similarly, treatments to avoid or cure such disorders are rising speedily. The book elucidates cardiac ion channels and the influence of genetics on cardiac arrhythmias. It is a compilation of several well conducted researches accomplished by experts all over the world and will provide valuable insights to its readers.