Method and apparatus for epicardial left atrial appendage isolation in patients with atrial fibrillation
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United States of America Patent
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Mar 18, 2008
Grant Date -
Feb 10, 2005
app pub date -
Jul 1, 2004
filing date -
Jul 1, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A catheter apparatus is provided for isolation of the left atrial appendage (LAA) having a catheter shaft, a probe disposed within the catheter shaft, and a control mechanism coupled to both the catheter shaft and the probe. The catheter shaft includes a main body with a distal tip section. The tip section can be deflected from the shaft's central axis in a controlled manner. The probe can be extended outward from the catheter shaft and has a distal end that is brought into contact with the LAA. The control mechanism controls the catheter shaft's rotational and longitudinal movement, the tip section's degree of deflection, and the probe's axial movement with respect to the catheter shaft. Preferably, the distal end is able to form a pre-stressed loop selected to have a size allowing it to substantially encircle the LAA's base. A method for epicardial isolation of the LAA is also provided.
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