Anatomic Relationships Between the Coronary Venous System, Surrounding Structures, and the Site of Origin of Epicardial Ventricular Arrhythmias

Abstract

The CVS is closer to the SOO of epicardial idiopathic VAs than the pericardial space, the ventricular endocardium, and the aortic cusps. Given the proximity to coronary arteries at the SOO, radiofrequency energy often cannot be safely delivered to eliminate a VA and ablation may also need to be performed from adjacent structures. A subxyphoid pericardial ablation procedure has a low probability of success in patients with idiopathic epicardial VAs.