Graphic interface for multi-spine probe

A method of mapping cardiac electrical activity comprising the steps of:

• inserting into a heart a distal portion of a catheter comprising an elongated body having a distal end, and a plurality of spines mounted at the distal end, each of the spines having a proximal end attached at the distal end of the body, a free end, and a plurality of electrodes;
• obtaining electrical signal data from the heart via the electrodes;
• sensing respective intracardiac locations and orientations of the spines;
• deriving an electroanatomic map of the heart from the signal data, wherein the electroanatomic map comprises a graphic representation comprising a circle having a center representing a location of a distal end of the body of the catheter and a plurality of radii representing intracardiac locations and orientations of the spines, and further comprises distinctive graphical indicia of the spines, wherein the graphic representation shows a non-equiangular distribution of the radii about the center corresponding to a non-symmetrical arrangement of the spines within the heart;
• displaying the electroanatomic map;
• and
• responsively to the displayed electroanatomic map, adjusting at least one of the locations and orientations of at least one of the spines so as to bring the arrangement of the spines more nearly into symmetry.