Myocardium of the superior vena cava, coronary sinus, vein of marshall, and the pulmonary vein ostia: gross anatomic studies in 620 hearts
Journal of Cardiovascular Electrophysiology, 07/16/2012
Desimone CV et al. – Myocardial extensions into the pulmonary veins are usually circumferential at the ostia validating the necessity for wide area rather than segmental ablation to isolate these veins during atrial fibrillation (AF) ablation. Myocardial extensions into the superior vena cava (SVC) are common and less likely to be circumferential, whereas extensions into the inferior vena cava (IVC) are not present. The left atrial ridge is a reliable endocardial target for radiofrequency ablation of the vein of Marshall.