1 Introduction 2 Molecular Mechanisms of Cardiac Electrical Activity 3 Cardiac Ion Channels 4 Electrophysiological Mechanisms of Cardiac Arrhythmias 5 Electrophysiological Testing: Tools and Techniques 6 Conventional Intracardiac Mapping Techniques 7 Advanced Mapping and Navigation Modalities 8 Ablation Energy Sources 9 Sinus Node Dysfunction 10 Atrioventricular Conduction Abnormalities 11 Intraventricular Conduction Abnormalities 12 Focal Atrial Tachycardia 13 Typical Atrial Flutter 14 Macroreentrant Atrial Tachycardia 15 Atrial Tachyarrhythmias in Adults With Congenital Heart Disease 16 Atrial Fibrillation: Pathophysiology and Epidemiology 17 Atrial Fibrillation: Clinical Presentation and Evaluation 18 Atrial Fibrillation: Management 19 Atrial Fibrillation: Stroke Prevention Strategies 20 Inappropriate Sinus Tachycardia 21 Atrioventricular Nodal Reentrant Tachycardia 22 Typical Atrioventricular Bypass Tracts 23 Atypical Bypass Tracts 24 Paroxysmal Supraventricular Tachycardias 25 Wide Complex Tachycardias 26 Ventricular Arrhythmias in Ischemic Heart Disease 27 Idiopathic Focal Ventricular Tachycardia 28 Idiopathic Fascicular Reentrant Ventricular Tachycardia 29 Ventricular Tachycardia in Nonischemic Dilated Cardiomyopathy 30 Bundle Branch Reentrant Ventricular Tachycardia 31 Epicardial Ventricular Tachycardia 32 Arrhythmias in Hypertrophic Cardiomyopathy 33 Ventricular Tachycardia in Inherited Arrhythmogenic Cardiomyopathy 34 Ventricular Arrhythmias in Adults With Congenital Heart Disease 35 Ventricular Arrhythmias in Inherited Channelopathies 36 Complications of Catheter Ablation of Cardiac Arrhythmias Index