Patent ID: 8364235

Claim:
A system for sensing multiple local electric voltages from endocardial surface of a heart, comprising: a first elongate tubular member having a lumen, a proximal end and a distal end; and a basket assembly comprising: a plurality of flexible splines for guiding a plurality of exposed electrodes, the splines having proximal portions and distal portions; an anchor for securably affixing the proximal portions of the splines; said anchor being secured at the distal end of the first elongate tubular member; an encapsulated and filament-wrapped distal tip comprising an encapsulant and a filament for securably affixing the distal portions of the splines in a predetermined angular relationship at said distal tip; wherein the flexible splines further comprise alignment members at the distal portions of the splines; wherein the filament is laced, looped or wound between, over and under the alignment members of the splines to substantially align and secure the distal portions of the splines in said predetermined angular relationship; wherein the splines comprise a superelastic material; and wherein the basket assembly has a radially expanded non-cylindrical shape.