Left Atrial Roof Vein

Catheter ablation therapy for persistent atrial fibrillation af typically includes pulmonary vein isolation pvi and may include additional ablation lesions that target patient specific anatomical electrical or structural features.

Left atrial roof vein.

However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. The ablation strategy consisted of liner ablations including the roof bottom and mitral isthmus as well as pulmonary vein isolation. In this case however the la roof vein had electrical activity and recorded local spontaneous firing suggesting that it can be the trigger of af. Isolation of the pulmonary veins pvs for the treatment of atrial fibrillation af is often supplemented with linear lesions within the left atrium la.

This vein ran from the right superior lobe of the lung to the left side of la roof. During cardiac development the oblique vein of the left atrium vein of marshall passes from a superior aspect onto the epicardial surface of the left atrium in between the left atrial appendage and the left superior pulmonary vein to descend along the posterolateral atrial wall to join the coronary sinus figure 2 b. Electrophysiological findings showed expansion of the myocardial sleeve and local firing in the la. Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein.

Pulmonary vein pv reconnection is mainly due to nontransmural ablation and is considered a major determinant of atrial fibrillation af recurrence after pulmonary vein isolation pvi several technologies have been developed in an attempt to improve radiofrequency rf lesion transmurality and pvi durability such as irrigated tip ablation catheters and real time contact. Addition of linear ablation lesions principally in the atrial roof between the left and right superior pulmonary veins and mitral isthmus between the left inferior pulmonary vein and the mitral annulus led to improved success rates especially in patients with paroxysmal af and coexistent la enlargement 3 and in patients with persistent af 4. Aberrant pulmonary vein draining to left atrial roof in a patient undergoing percutaneous circumferential pulmonary vein isolation pdf. Therefore it may have a myocardial sleeve as same as general pvs.

Roles of the left atrial roof and pulmonary veins in the anatomic substrate for persistent atrial fibrillation and ablation in a canine model. Ethanol infusion of 5 ml into the marshall vein was performed prior to pulmonary vein isolation while locating the advisortm hd grid mapping catheter abbott.