Cryoablation of arrhythmias from the interventricular septum: initial experience with a new biventricular approach.

The use of cryothermy in addition to other newer surgical techniques has improved the outcome for patients undergoing operation for ventricular tachycardia. However, the depth to which the cryothermic lesions penetrate the myocardium may be a limiting factor in some situations. In an attempt to overcome this problem, we applied cryothermia from both sides using a new biventricular approach in five patients with documented interventricular septal foci. The advantages, disadvantages, and possible indications for the use of this approach are discussed, as are methods for avoiding potential complications.