Loop configuration for cardiac catheter end effector

A catheter for electrophysiology applications, comprising:

• (a) a shaft extending along a longitudinal axis to a distal end;
• and
• (b) an end effector coupled to the distal end of the shaft, the end effector being configured to transition between an expanded state and a collapsed state, the end effector being resiliently biased to assume the expanded state, the end effector including:
• (i) a pair of inner loop members each including a respective plurality of electrodes, a first one of the inner loop members comprising first and second spine members both disposed on a first side of the longitudinal axis of the shaft, and a second one of the inner loop members comprising third and fourth spine members both disposed on a second side of the longitudinal axis of the shaft, and
• (ii) an outer loop member including a respective plurality of electrodes, the outer loop member being positioned radially outwardly of each of the inner loop members relative to the longitudinal axis.

A catheter for electrophysiology applications comprising:

• (a) a main loop extending along a longitudinal axis on a first plane;
• (b) a second loop extending generally parallel to the longitudinal axis and comprising first and second spine members both positioned on one side of the longitudinal axis on a second plane generally parallel to the first plane, the second loop being coupled to the main loop proximate a distal portion of the main loop;
• and
• (c) a third loop extending generally parallel to the longitudinal axis and comprising third and fourth spine members both positioned on another side of the longitudinal axis on the second plane, the third loop being coupled to the main loop proximate the distal portion of the main loop.