Basket style cardiac mapping catheter having a flexible electrode assembly for sensing monophasic action potentials

摘要

A system for sensing monophasic action potentials from endocardial tissue of a heart, includes: a plurality of flexible splines; an anchor for securably affixing the proximal portions of the splines; a tip for securably affixing the distal portions of the splines; and a polymeric member including opposed a first open end and a second open end defining an open lumen therein between, where at least one of the plurality of flexible splines is at least partially disposed within the lumen of the polymeric member; a flexible electrode assembly strip with two or more exposed electrodes oppositely disposed on at least a portion of the outer surface of the polymeric member.

主权项

1. A system for sensing monophasic action potentials from endocardial tissue of a heart, comprising:
a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly comprising:
a plurality of flexible splines having proximal portions, distal portions and medial portions therein between, wherein the splines comprise an outer surface, an inner surface and two side surfaces;a proximal anchor for securably affixing the proximal portions of the splines, wherein the anchor is securably affixed within the lumen of the elongate tubular member at the distal end of the first elongate tubular member;a tip for securably affixing the distal portions of the splines; anda polymeric member comprising opposed first and second open ends defining an open lumen therein between and an inner member surface and an outer member surface, wherein at least one of the plurality of flexible splines is at least partially disposed within the lumen of said polymeric member;a flexible electrode assembly strip having a longitudinal length with two or more laterally extending and staggered wings, each of said wings having an exposed electrode, the flexible electrode assembly strip being directly disposed on at least a portion of the outer surface of said polymeric member; wherein the flexible electrode assembly strip comprises:
a polymeric substrate having an inner surface and an opposed outer surface;said two or more exposed electrodes directly disposed over at least part of the outer surface of the polymeric substrate; andtwo or more electrical traces directly disposed over at least a portion of the inner surface of the polymeric substrate or over at least a portion of the outer surface of the polymeric substrate, said two or more electrical traces being in electrical communication with said two or more exposed electrodes; wherein at least one of the two or more exposed electrodes is disposed over at least part of the outer surface of the polymeric member which is adjacent to the outer surface of the spline and the other of the two or more exposed electrodes is disposed over at least another part of the outer surface of the polymeric member which is adjacent to the inner surface of the spline; wherein the first opposed open end of the polymeric member is disposed at the distal spline portion of said at least one of the plurality of flexible splines at a position near to the distal tip and the second opposed open end of the polymeric member is secured to the proximal spline portion of said at least one of the plurality of flexible splines at a position near to the anchor; wherein medial portions of the polymeric member between said first opposed open end and said second opposed open end of the polymeric member are not secured to said medial portions of said at least one of the plurality of flexible splines; wherein the basket assembly has a radially expanded non-cylindrical shape; and wherein the splines comprise a superelastic material.