1. Junjie Zhang et al. JACEP 2017;3:894-904
The EP Substrate in Relation to PVCs (A) Epicardial J-wave magnitude and (B) ARI maps during SR. (C) Premature ventricular contraction (PVC) activation map and 12-lead electrocardiogram (ECG). Each panel shows maps for 2 patients, ER-1 (left, PVC coupling interval = 635 ms) and ER-11 (right, PVC coupling interval = 520 ms). The hearts are displayed in anterior and lateral views. White arrows in B point to regions with steep ARI gradients. In C, J-wave EGMs from the PVC site of origin are shown (black arrow); 12-lead ECG depicting the PVC is shown to the right of the map. The PVC initiation sites are indicated by plus signs (+). Note that an electrophysiological (EP) substrate with abnormal EGMs, shortened ARIs, and steep ARI gradients correlated with the PVC site of origin in both cases. Abbreviations as in Figures 1, 2, 3, and 4.
Junjie Zhang et al. JACEP 2017;3:
2017 American College of Cardiology Foundation