395. What is parasystole? / What is pseudotachycardia? / Ddx irregularly irregular rhythm July 6th, 2008 by reuben in arrhythmia Back Top Tags: card 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? 396. Describe the P waves in sinus tachycardia / When a beta blocker is indicated in sinus tach / Ddx sinus tach Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.