| CPC A61B 18/1492 (2013.01) [A61B 2018/00577 (2013.01); A61B 2018/00738 (2013.01); A61B 2018/00761 (2013.01); A61B 2018/00791 (2013.01)] | 6 Claims |
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1. A method of ablation comprising:
inserting a catheter into a subject, the catheter having an ablation electrode configured for tissue contact;
performing an ablation session on the tissue for a predetermined total duration of time less than about 18 seconds, including:
applying resistive heating to the tissue by radiofrequency (RF) power via the electrode within a range of about 75 W-95 W for a first duration of about 4 seconds to form a lesion with a depth of about 3.5 mm;
suspending application of RF power to the electrode for a second duration no greater than 10 seconds, during which a temperature of the lesion continues to increase, to allow tissue surrounding the lesion to heat by conduction from the lesion;
measuring temperature of the tissue at least every 33 ms at a depth of about 3 mm to determine dissipation of about 90% of heat of the tissue within about 4 seconds; and
while the tissue surrounding the lesion remains heated by conduction from the lesion, reapplying resistive heating by RF power via the electrode within the range of about 75 W-95 W for a third duration of about 4 seconds to the lesion to increase depth of the lesion to about 4.5 mm into the surrounding tissue.
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