Patent ID: 8308719

Claim:
A method of ablating cardiac tissue, the method comprising: providing a tissue ablation device including a plurality of ablating elements and at least one adjustment structure coupled to at least one of the plurality of ablating elements; placing the tissue ablation device in a first position on an epicardial surface; activating the at least one of the plurality of ablating elements at least once to emit ultrasonic energy focused in at least one dimension towards tissue to be ablated; and adjusting the at least one adjustment structure, wherein movement of the adjustment structure physically moves at least one of the plurality of ablating elements relative to the tissue, and wherein movement of the at least one of the plurality of ablating elements moves a focus of the ultrasonic energy emitted by the at least one of the plurality of ablating elements into at least one preset position relative to the tissue to be ablated without relocating the device from the first position on the epicardial surface.