1. Pablo Ávila et al. JACEP 2015;1:353-365
Patient With Multiple Appropriate Discharges After Complete Endocardial Ablation The electrocardiographic ventricular tachycardia (VT) morphology (A) suggested an epicardial origin: presence of delta wave in lead V2 >35 ms, interval to R-wave peak >85 ms. The electroanatomic epicardial voltage map (B) illustrates the scar and a channel in segment 1, the catheter tip shows where the electrogram with late potential (right superior corner) was recorded. Pace mapping from this site reproduced the VT morphology (C). This site corresponded to a heterogeneous tissue channel (black arrow) in the signal intensity (SI) epicardial map (D). Although the scar seems much larger in the SI than in the electroanatomic map, this mismatch could be due to the fact that epicardial voltage mapping is recording the normal right ventricular wall, which was removed from the SI map. Dense scar, heterogeneous tissue, and healthy tissue areas in the epicardial SI map are presented.
Pablo Ávila et al. JACEP 2015;1:
American College of Cardiology Foundation