intercalated disc physical junction between adjacent cardiac muscle cells
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isovolumic contraction initial phase of ventricular contraction in which tension and pressure in the ventricle increase, but no blood is pumped or ejected from the heart
mesothelium simple squamous epithelial portion of serous membranes, such as the superficial portion of the epicardium
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middle cardiac vein vessel that parallels and drains the areas supplied by the posterior interventricular artery
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mitral valve valve located between the left atrium and ventricle
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moderator band band of myocardium covered by endocardium that arises from the inferior portion of the interventricular septum in the right ventricle and crosses to the anterior papillary muscle
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murmur unusual heart sound detected by auscultation
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pericardial sac membrane that separates the heart from other mediastinal structures
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pericardium membrane that separates the heart from other mediastinal structures
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posterior cardiac vein vessel that parallels and drains the areas supplied by the marginal artery branch of the circumflex artery
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posterior interventricular artery branch of the right coronary artery that runs along the posterior portion of the interventricular sulcus toward the apex of the heart and gives rise to branches that supply the interventricular septum and portions of both ventricles