Nair, KKMNamboodiri, NThajudeen, APatel, NValaparambil, ATharakan, J2017-03-102017-03-10201627 ,7;872-87310.1111/jce.12927https://dspace.sctimst.ac.in/handle/123456789/10108Cardiovascular System & CardiologyNarrow QRS Tachycardia With RR Alternans and 2:1 VA Relation