has part has part has_part characteristic of characteristic of part of has modifier cardiac muscle contraction abnormal cardiovascular system physiology abnormal cardiac muscle contractility MPheno.ontology altered ability of the heart muscle to shorten or to develop increased tension, often measured by dP/dT max, fractional shortening (FS), velocity of circumferential fiber shortening (Vcfc), peak of aortic outflow velocity (PAV), and ventricular ejection fraction volume abnormal fractional shortening (FS) abnormal peak of aortic outflow velocity (PAV) abnormal velocity of circumferential fibre shortening (Vcfc) MP:0002972 abnormal ventricular ejection fraction volume abnormal velocity of circumferential fiber shortening (Vcfc) abnormal muscle contractility quality abnormal cardiac muscle tissue