LAUSR

Using the 0.014 inch wire advanced into the left coronary arteries, unipolar mapping can be performed from the left coronary artery. Introduction Despite the advances in mapping and ablation technique, catheter ablation for ventricular arrhythmias (VA) originating from the left ventricular (LV) summit remains challenging. Intracoronary artery mapping with a guidewire has been reported to be useful as a guide of radiofrequency catheter ablation and intracoronary ethanol ablation of LV summit VAs. Three-dimensional (3D) visualization of the coronary arteries by merging 3D images of computed tomography (CT) and magnetic resonance imaging (MRI) into 3D electroanatomic maps has been used for mapping of LV summit VAs. However, the utility and feasibility of coronary artery visualization by 3D mapping system with a guidewire has not been reported. We present a case in which intracoronary artery mapping and visualization of the coronary arteries by 3D mapping system with a guidewire was useful for catheter ablation of premature ventricular contractions (PVCs) triggering recurrent ventricular fibrillation (VF).