Assessment of Ventricular Tachycardia Scar Substrate by Intracardiac Echocardiography

抄録

We assessed whether signal intensity units (SIUs) on intracardiac echocardiography (ICE) images can be used to identify scar tissue in the left ventricle (LV) and, thus, guide ablation of substrate-based ventricular tachycardia. Two-dimensional ICE images were obtained from 12 patients undergoing catheter ablation and were used for 3D reconstruction of the LV. Electroanatomic maps were also obtained. Contrast-enhanced cardiac magnetic resonance imaging (CE-CMR) was performed in 8 of these patients. The SIUs for the ICE images, low-voltage zones on the electroanatomic maps, and late gadolinium-enhancement areas on the CE-CMR images corresponded. Thus, ICE may be useful for identifying LV scar substrate.