Left Atrial Roof Vien

However detailed repeated analyses of changes in electrophysiological properties and atrial activation after each step are difficult to obtain during clinical.

Left atrial roof vien.

However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. Conventional ablation plus left atrial roof ablation pulmonary vein encircling by performing continuous radiofrequency lesions surrounding each ipsilateral pulmonary vein antrum plus creation of a radiofrequency line joining contralateral superior pulmonary veins throughout the left atrial roof. Aberrant pulmonary vein draining to left atrial roof in a patient undergoing percutaneous circumferential pulmonary vein isolation pdf. 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.

Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein. Additional ablation lines often involving left atrial roof ablation lara as a second step improve procedural outcomes 7 8 and are effective in managing persistent af. Surface electrocardiographic criteria to differentiate it from mitral annular ma flutters are lacking. Left atrial la roof dependent flutter is a common macroreentrant la tachycardia that involves the la roof and typically spins around ipsilateral pulmonary veins pvs.

The left phrenic nerve takes an anterior 18 lateral 59 or posteroinferior 23 course on the fibrous pericardium overlying the left heart. Research in cardiovascular medicine. 53 the lateral course passes over the tip of the left atrial appendage whereas the posteroinferior course passes over the roof of the appendage os. Electrophysiological findings showed expansion of the myocardial sleeve and local firing in the la.

A 77 year old woman who had previously undergone pulmonary vein pv isolation for persistent atrial fibrillation underwent a second procedure for a recurrent atrial tachycardia at. The clinical at was a dual loop at with left atrial la roof dependent and anterior macro re entrant circuits and terminated by an la roof and left superior pv mitral annulus linear ablation. Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein.