Source:http://linkedlifedata.com/resource/umls/id/C1516294
GO: Muscle contraction of cardiac muscle tissue. [GOC:dph],NCI: Driven primarily by voltage-gated Ca+2 action potentials originating in sinoatrial pace-maker cells, Cardiac Muscle Contraction involves shortening of the gap junction-linked nonsyncytial striated heart myocytes in the atrial and ventricular chambers that forces movement of the blood through the circulatory system.