Ablation catheter having a virtual electrode comprising portholes and a porous conductor
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United States of America Patent
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-
Nov 1, 2005
Grant Date -
Jul 22, 2004
app pub date -
Jun 27, 2003
filing date -
Jan 21, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An ablation catheter used for treatment of, for example, atrial fibrillation by electrically isolating a vessel, such as a pulmonary vein, from a chamber, such as the left atrium. The ablation catheter has a virtual electrode and a catheter shaft. The virtual electrode comprises a porous conductor. 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 and, upon energization, the virtual electrode creates a continuous lesion at or near the ostium of the pulmonary vein, thereby electrically isolating the pulmonary vein from the left atrium.
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