BASKET STYLE CARDIAC MAPPING CATHETER HAVING SPLINE BENDS FOR DETECTION OF CARDIAC RHYTHM DISORDERS

摘要

A system (10) for sensing multiple local electric voltages from endocardial surface of a heart, may comprise: a first elongate tubular member (20); a basket assembly (12) comprising: a plurality of flexible splines (14); a proximal anchor (18) for securably affixing the proximal portions (62) of the splines (14); said proximal anchor (18) being secured at the distal end (20B) of the first elongate tubular member (20); a distal tip (16) for securably affixing the distal portions (66) of the splines (14), said proximal anchor (18) and said distal tip (16) defining a longitudinal axis therein between about which the splines (14) are disposed; wherein the splines (14) approach the distal tip (18) at an angle (a) of about 90° or less; wherein the splines (14) in the radially expanded non - spherical shape contain a distal excurvate outward bend (80) disposed at the distal portion (66) of the spline (14) to bend the splines (14) back towards the proximal anchor (18).