Alternating RBBB with Left anterior hemiblock is seen in: (A) 1' degree hea block, (B) Complete hea block, (C) Mobitz type II block, (D) Bi-fascicular block
Answer is D. Ans. is 'd' i.e., Bi-fascicular block Bifascicular block - combination of RBBB with either left anterior hemiblock or left posterior hemiblock. Tri fascicular block - RBBB plus either LAHB/LPHB+ first degree AV block. Complete hea block destruction of - AV node leading to AV dissociation