ABLATION DEVICES, SYSTEMS AND METHODS OF USING A HIGH-RESOLUTION ELECTRODE ASSEMBLY

摘要

According to some embodiments, an ablation device comprises an elongate body (e.g., a catheter) having a proximal end and a distal end, a first electrode (e.g., a radiofrequency electrode) positioned at the distal end of the elongate body, at least a second electrode (e.g., a radiofrequency electrode) positioned at a location proximal to the first electrode, the first electrode and the second electrode being configured to contact tissue of a subject and deliver radiofrequency energy sufficient to at least partially ablate the tissue, at least one electrically insulating gap positioned between the first electrode and the second electrode and a filtering element configured to present a low impedance at a frequency used for delivering ablation energy via the first and second electrodes.

主权项

1. A device for mapping and ablating tissue, comprising:
an elongate body comprising a proximal end and a distal end; a first electrode portion positioned on the elongate body; at least a second electrode portion positioned adjacent the first electrode portion, the first electrode portion and the second electrode portion being configured to at least partially contact tissue of a subject and to deliver radiofrequency energy sufficient to at least partially ablate the tissue; at least one electrically insulating gap positioned between the first electrode portion and the second electrode portion, the at least one electrically insulating gap comprising a gap width separating the first and second electrode portions; and wherein the first electrode portion is electrically coupled to the second electrode portion using a filtering element, wherein the filtering element is configured to present a low impedance at a frequency used for delivering ablative energy via the first and second electrode portions.