This practical guide to the diagnosis and ablation of cardiac arrhythmias in the electrophysiology laboratory is an indispensable resource for electrophysiologists and general cardiologists. It contains an extensive, unmatched collection of intracardiac recordings, fluoroscopic and ICE images, and 3D color-coded electroanatomic maps (EAMs), making it the premier electrophysiology reference for gaining a better understanding of cardiac arrhythmias. Each chapter focuses on a specific arrhythmia and presents a systematic discussion of diagnostic and ablation criteria, followed by an atlas of electrophysiologic recordings. These illustrations demonstrate all key aspects of the arrhythmia: electrophysiologic features, mode of induction and termination, response to diagnostic pacing maneuvers, classic presentations, unusual manifestations, mapping techniques, and target site criteria for ablation.