394. An RV source for a PVC results in what morphology QRS? / What is a fusion beat? / What is an interpolated PVC? / What is the treatment for PVCs? / What is the Lown classification of PVCs? July 6th, 2008 by reuben in arrhythmia Back Top Tags: card 393. What does the ECG show for a PJC? Causes of PVCs and ventricular tachycardia / When does a PVC appear narrow? 395. What is parasystole? / What is pseudotachycardia? / Ddx irregularly irregular rhythm Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.