Nair, KKMNamboodiri, NBanavalikar, BValaparambil, AThajudeen, ATharakan, J2017-03-102017-03-10201639 ,11;1279-128010.1111/pace.12952https://dspace.sctimst.ac.in/handle/123456789/10112Cardiovascular System & Cardiology; EngineeringNarrow QRS Tachycardia with Varying Intervals: What Is the Mechanism?