Book excerpt: This issue of Cardiac Electrophysiology Clinics, Guest Edited by Drs. Fermin C. Garcia, Luis C. Saenz, and Pasquale Santangeli, is dedicated to Intracardiac Echo Imaging in Atrial and Ventricular Arrhythmia Ablation. This is one of four issues selected each year by the series Consulting Editors, Ranjan K. Thakur and Andrea Natale. Topics include, but are not limited to: How to use intracardiac echography to recognize normal cardiac anatomy, Intracardiac echography to guide catheter ablation of ventricular arrhythmias in ischemic cardiomyopathy, Intracardiac echography to guide ablation of parahisian arrhythmias, Utility of ICE to guide transseptal catheterization for different EP procedures, Intracardiac echography to guide catheter ablation of atrial fibrillation, Role of intracardiac echography for transcatheter occlusion of left atrial appendage, Intracardiac echography to guide catheter ablation of idiopathic ventricular arrythmias, Intracardiac echography to guide catheter ablation of ventricular arrhythmias in non-ischemic cardiomyopathy, Intracardiac echography to guide mapping and ablation of arrhythmias in congenital heart disease patients, Prevention and early recognition of complications during catheter ablation by Intracardiac echography, Intracardiac echography to evaluate radiofrequency lesion creation and Image integration using intracardiac echography and 3-D reconstruction for mapping and ablation of atrial and ventricular arrhythmias.