Ablation catheter assembly having a virtual electrode...

Details Ablation catheter assembly having a virtual electrode... Ablation catheter assembly having a virtual electrode...

2006-01-10

2006-01-10

Rollins, Rosiland (Department: 3739)

Surgery

Instruments

Electrical application

C606S049000, C607S104000, C607S105000, C607S113000

Reexamination Certificate

active

06984232

ABSTRACT:
An ablation catheter having a catheter shaft and a virtual electrode, the virtual electrode comprising portholes through an outer peripheral wall of the catheter shaft and a metal electrode, the catheter being used for treatment of cardiac arrhythmia, for example, atrial fibrillation, by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The catheter shaft includes a proximal portion and a distal portion. The distal portion includes an active region, which is either a looped structure transverse to the longitudinal axis of the catheter shaft, or a linear structure that extends parallel to the longitudinal axis of the catheter shaft. During use, the active region is directed into contact with, for example, the wall of a pulmonary vein. Upon energization, the virtual electrode creates a continuous lesion on an inner wall of the pulmonary vein, thereby electrically isolating the pulmonary vein from the left atrium.

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