Papillary Muscle Hypothesis of Idiopathic Left Ventricular Tachycardia

Papillary Muscle Ventricular Tachycardia: Another Zigsaw Puzzle to Be Solved

Idiopathic ventricular arrhythmias (VAs) with diverse mechanisms have been described in the left ventricle (LV). The predilection sites for these VAs are LV outflow tract, aortic cusps, mitral annulus, or epicardium (LV summit) and epicardial venous tissue (LV crux). Recently, idiopathic ventricular tachycardias (VT) or premature ventricular contractions (PVC) originating from the papillary mus...

Successful catheter ablation of idiopathic ventricular tachycardia originating from the top of the left ventricular posterior papillary muscle near the chordae tendineae: Usefulness of intracardiac three-dimensional echocardiography

Hiroshi Kawakami, MD, Takashi Noda, MD, PhD, Koji Miyamoto, MD, Kazuhiro Satomi, MD, PhD, Wataru Shimizu, MD, PhD, Kengo F Kusano, MD, PhD From the Division of Arrhythmia and Electrophysiology, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Japan, Department of Cardiology, Tokyo Medical University Hachioji Medical Center, Tokyo, Japan, and Department ...

Ablation of ventricular tachycardia originating from the papillary muscle of the left ventricle early after heart transplantation.

Cryoablation for Ventricular Tachycardia Originating from Anterior Papillary Muscle of Left Ventricle Guided by Intracardiac Echocardiography

Papillary muscles (PMs) were reported to be origin of ventricular arrhythmia (VA). Radiofrequency (RF) ablation was reported to be acutely effective in eliminating VA. However, the recurrence rate is high. Recently, cryoablation guided by intracardiac echocardiography, 3-dimensional mapping system, and image integration was introduced as alternative strategy for this challenging ablation. We pr...

Multiple monomorphic ventricular tachycardias in a structurally normal heart: A case report

Catheter ablation has curative potential in patients with idiopathic ventricular tachycardia (VT). Different endocavitary structures, such as papillary muscles, moderator band, and false tendon, have been described as the substrate for idiopathic VT. Although single-morphology VT arising from a false tendon is a well-known entity, multiple monomorphic VTs requiring ablation of a false tendon have

Electroanatomical Characteristics of Idiopathic Left Ventricular Tachycardia and Optimal Ablation Target during Sinus Rhythm: Significance of Preferential Conduction through Purkinje Fibers

PURPOSE We hypothesized that Purkinje potential and their preferential conduction to the left ventricle (LV) posteroseptum during sinus rhythm (SR) are part of reentrant circuits of idiopathic left ventricular tachycardia (ILVT) and reentry anchors to papillary muscle. MATERIALS AND METHODS In 14 patients with ILVT (11 men, mean age 31.5±11.1 years), we compared Purkinje potential and prefere...