Left Atrial Roof Line

Of the several proposed linear lesions only mitral isthmus and roof line ablation remain commonly performed as an adjunct to pulmonary vein isolation in the treatment of atrial fibrillation 2 3.

Left atrial roof line.

Hocini m jais p sanders p takahashi y rotter m rostock t hsu lf sacher f reuter s clementy j haissaguerre m. The left atrial line is a single lumen catheter unlike the right atrial line which is double lumen. It is sometimes called sequential ablation because the additional ablation lines are performed in a specified order. These lines include the la roof the posterior line and the mitral isthmus 6 12 still the role of additional lines remains controversial.

Surface electrocardiographic criteria to differentiate it from mitral annular ma flutters are lacking. That is doctors may make a lesion line along the roof of the left atrium and then pace or use a mapping catheter to determine whether conduction has been stopped. The left atrial line enters from the left superior pulmonary vein and exits the far side of the chest. An irrigated ablation catheter is introduced with its tip oriented toward the la roof.

If there continues to be afib activity the doctor will ablate the next area in the sequence. They described the phenomenon of intra atrial conduction block in a subset of patients undergoing ablation for left lateral accessory pathways. 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. Techniques evaluation and consequences of linear block at the left atrial roof in paroxysmal atrial fibrillation.

A left atrial la line monitors left atrial pressures acting as a surrogate for left ventricular function preload and afterload. Technique for ablation of the left atrial roof the la roofline is a line of lesions joining the left and right superior pvs. However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. Isolation of the pulmonary veins pvs for the treatment of atrial fibrillation af is often supplemented with linear lesions within the left atrium la.

Another at with a tachycardia cycle length tcl of 240 ms was then induced. A prospective randomized study. 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.