Atrial chambers: gross anatomy and intracardiac phased-array echocardiography imaging -- Interatrial septum -- Role of intracardiac echocardiography for ablation of ventricular tachycardia -- Abnormal anatomy: left atrial structures -- Intracardiac echocardiography during catheter ablation for atrial fibrillation -- Transcatheter occlusion of left atrial appendage for stroke prevention in atrial fibrillation -- potential role for intracardiac echocardiography -- Intracardiac echocardiography: transseptal catheterization -- Right atrium: ICE in anatomic definition, mapping and ablation -- Intracardiac echocardiography in the congenital catheterization laboratory -- Intrapericardial echocardiography: a novel catheter-based approach to cardiac imaging -- Three-dimensional echocardiography -- future applications in interventional cardiology -- Future of image-guided therapies in interventional electrophysiology.