System and method for delivery of energy to tissue while compensating for collateral tissue
First Claim
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1. A tissue ablation method for treating atrial fibrillation in a patient, said method comprising:
- locating an ostium of a pulmonary vein;
positioning an interventional catheter adjacent the ostium, the interventional catheter having an energy source;
identifying collateral tissue adjacent the ostium;
ablating tissue around the ostium with energy from the energy source so as to form a contiguous lesion circumscribing the ostium, the lesion blocking aberrant electrical pathways in the tissue so as to reduce or eliminate the atrial fibrillation; and
modifying the ablating so as to avoid ablating or otherwise damaging the collateral tissue, wherein modifying comprises changing the continuous lesion circumscribing the ostium to a new lesion path that continuously circumscribes the ostium.
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Abstract
A tissue ablation method for treating atrial fibrillation in a patient comprises locating an ostium of a pulmonary vein and positioning an interventional catheter adjacent the ostium. The interventional catheter has an energy source. Collateral tissue adjacent the ostium is located and tissue around the ostium is ablated with energy from the energy source so as to form a contiguous lesion circumscribing the ostium. The lesion blocks aberrant electrical pathways in the tissue so as to reduce or eliminate the atrial fibrillation. The ablating is modified so as to avoid ablating or otherwise damaging the collateral tissue.
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Citations
26 Claims
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1. A tissue ablation method for treating atrial fibrillation in a patient, said method comprising:
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locating an ostium of a pulmonary vein; positioning an interventional catheter adjacent the ostium, the interventional catheter having an energy source; identifying collateral tissue adjacent the ostium; ablating tissue around the ostium with energy from the energy source so as to form a contiguous lesion circumscribing the ostium, the lesion blocking aberrant electrical pathways in the tissue so as to reduce or eliminate the atrial fibrillation; and modifying the ablating so as to avoid ablating or otherwise damaging the collateral tissue, wherein modifying comprises changing the continuous lesion circumscribing the ostium to a new lesion path that continuously circumscribes the ostium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A tissue ablation system for treating atrial fibrillation in a patient, said system comprising:
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an interventional catheter having an energy source and a sensor, wherein the energy source is adapted to deliver a beam of energy to tissue thereby ablating tissue around an ostium of a pulmonary vein to form a contiguous lesion circumscribing the ostium, the lesion blocking aberrant electrical pathways in the tissue so as to reduce or eliminate the atrial fibrillation; and an esophageal detection device positionable in the esophagus, the detection device having a transponder detectable by the sensor through one or more layers of tissue, and wherein the sensor provides feedback to the interventional catheter based on the detection of the esophageal detection device so as to modify the continuous lesion circumscribing the ostium to a new lesion path that continuously circumscribes the ostium. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification