Intramural outflow tract ventricular tachycardia: anatomy, mapping, and ablation.

摘要

Idiopathic ventricular tachycardia (VT) originating from the outflow tract has been treated with a relatively high success rate by radiofrequency catheter ablation. However, a small percentage of failure in these patients may be because of an inaccessible site of origin from an intramural location. The region of the interventricular septum between the right (RVOT) and left ventricular outflow tracts (LVOT) can be mapped by using thinner multielectrode catheters advanced via the septal perforating venous tributaries of the great cardiac vein (GCV).1,2 The following case series is a description of these intramural VTs and the anatomic analysis in this region.