To view the full text, please login as a subscribed user or purchase a subscription. Click here to view the full text on ScienceDirect. FiguresFig. 1a: 1- Single Truncated APM arises from Middle ⅓ of ventricular wall; 2, 3 - Double Conical interconnected PPM arise from Lower ⅓ of wall. No SPM.b: 1- Single Trifurcated APM,2- Single Flattop PPM,3- Single tiny Conical SPM.All muscles arise from Middle ⅓ of ventricular wall.L – Length, B - Breadth.Fig.