Catheter with Fibonacci distributed electrodes

A method comprising the steps of:

• introducing a catheter into a heart to be mapped, wherein the catheter comprises:
• an elongated catheter body having a distal portion and at least one lumen extending longitudinally therethrough;
• and
• a mapping assembly mounted at the distal portion of the catheter body and comprising a plurality of splines, each of the splines having a proximal end disposed at the distal portion of the catheter body and a distal end and configured as a Fibonacci spiral arm that follows a portion of a Fibonacci sequence so as to diverge outwardly from the proximal end, wherein each of the splines comprises:
• a support arm having shape memory;
• a non-conductive covering in surrounding relation to the support arm;
• at least one location sensor mounted at or near the distal end;
• a plurality of electrodes mounted in surrounding relation to the non-conductive covering;
• and
• a plurality of electrode lead wires extending within the non-conductive covering, each electrode lead wire being attached to a corresponding one of the electrodes, the method further comprising:
• positioning the mapping assembly so that at least one electrode from each spine is in contact with a respective location in the heart;
• and
• recording respective electrical data from the at least one electrode of each spline.