Endocardial Right and Left Ventricular Cryo Balloon Ablation as a
Bailout Strategy for Refractory Ventricular Tachycardia
Abstract
We report seven patients who underwent bail out cryoballoon ablation of
ventricular arrhythmias refractory to conventional endocardial
radiofrequency ablation. Ablated arrhythmia substrates included right
ventricular moderator band (n=2), left ventricular (LV) papillary muscle
(n=2), left fascicular (n=1) and deep LV myocardial (n=2). Cryoballoon
ablation was successful in 5/7 patients. Advantages of cryoballon
ablation include adhesive stability on endocavitary structures and
creation deep homogeneous myocardial lesionds. Newer balloon
technologies designed to improve myocardial contact that incorporate
high density mapping on the balloon surface may expand utility of this
technology for ablation of ventricular arrhythmias.