Left Atrial Roof Line

A left atrial isthmus was first described by luria et al.

Left atrial roof line.

As a result of greater extension of atrial fibrosis 5 for this reason the creation of additional linear lesions in the left atrium la has been proposed. However there are conflicting data on the effects of creating a roof line rl joining the superior pvs in paroxysmal atrial fibrillation paf. It is sometimes called sequential ablation because the additional ablation lines are performed in a specified order. A prospective randomized study.

An irrigated ablation catheter is introduced with its tip oriented toward the la roof. The left atrial line enters from the left superior pulmonary vein and exits the far side of the chest. 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. The left atrial line is a single lumen catheter unlike the right atrial line which is double lumen.

Hocini m jais p sanders p takahashi y rotter m rostock t hsu lf sacher f reuter s clementy j haissaguerre m. A left atrial la line monitors left atrial pressures acting as a surrogate for left ventricular function preload and afterload. These lines include the la roof the posterior line and the mitral isthmus 6 12 still the role of additional lines remains controversial. Another at with a tachycardia cycle length tcl of 240 ms was then induced.

If there continues to be afib activity the doctor will ablate the next area in the sequence. 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. Technique for ablation of the left atrial roof the la roofline is a line of lesions joining the left and right superior 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.

Techniques evaluation and consequences of linear block at the left atrial roof in paroxysmal atrial fibrillation. 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 and in patients with persistent af. They described the phenomenon of intra atrial conduction block in a subset of patients undergoing ablation for left lateral accessory pathways.