cardiac muscle fiber morphological measurement cardiac myocyte cross-sectional area 2021-09-09T18:12:17Z A measurement of the extent of a plane through, that is, perpendicular to the axis of, a cardiac myocyte, striated muscle cells that are responsible for heart contraction. In mammals, the contractile fiber resembles those of skeletal muscle but are only one third as large in diameter, are richer in sarcoplasm, and contain centrally located instead of peripheral nuclei. CMO:0003840 PMID:22258067 cardiac fiber cross-sectional area cardiac muscle fiber cross-sectional area cardiomyocyte cross-sectional area clinical_measurement_ontology heart muscle cell cross-sectional area slaulede striated cardiac muscle cell cross-sectional area