Most of the current treatment modalities in cardiology relieve symptoms but not result a real cure,however,interruption of a reentrant pathway or elimination of an arrhythmic focus can result in a permanent cure.this book make the challenging and exciting topic of cardiac electrophysiology accessible to all interested individuals,furthermore it instructs our readers on the concepts and practices taught at our institution.I understand that elctrophysiology is a rapidly evolving field and that it is impossible to comprehensievely and definitively cover such a dynamic topic but i believe that the ideas and the techniques presented within this book will help make electrophysiology accessible to those individuals who have a desire to learn it.