Left Atrial Roof Vien

The left phrenic nerve takes an anterior 18 lateral 59 or posteroinferior 23 course on the fibrous pericardium overlying the left heart.

Left atrial roof vien.

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. Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein. Pre operative three dimensional computed tomography revealed a unique left atrial la roof vein. Isolation of the pulmonary veins pvs for the treatment of atrial fibrillation af is often supplemented with linear lesions within the left atrium la.

Research in cardiovascular medicine. 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. 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. Electrophysiological findings showed expansion of the myocardial sleeve and local firing in the la.

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. However detailed repeated analyses of changes in electrophysiological properties and atrial activation after each step are difficult to obtain during clinical. Surface electrocardiographic criteria to differentiate it from mitral annular ma flutters are lacking. Aberrant pulmonary vein draining to left atrial roof in a patient undergoing percutaneous circumferential pulmonary vein isolation pdf.

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. However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. Studies of the stepwise ablation approach have provided insights into some aspects of the contribution of ablating various regions in human af 10 11.