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.

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. 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. Isolation of the pulmonary veins pvs for the treatment of atrial fibrillation af is often supplemented with linear lesions within the left atrium la. 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.

Electrophysiological findings showed expansion of the myocardial sleeve and local firing in the la roof vein. Aberrant pulmonary vein draining to left atrial roof in a patient undergoing percutaneous circumferential pulmonary vein isolation pdf. However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. The left phrenic nerve takes an anterior 18 lateral 59 or posteroinferior 23 course on the fibrous pericardium overlying the left heart.

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. 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. Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein.

Electrophysiological findings showed expansion of the myocardial sleeve and local firing in the la. Studies of the stepwise ablation approach have provided insights into some aspects of the contribution of ablating various regions in human af 10 11. 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.