Regional differences in capillary density and myocyte size in the normal human heart

Abstract
Significant regional morphometric differences are reported for the normal human left ventricle. Epimyocardial capillary density (2,439 capillaries/mm2) is 21% greater than endomyocardial capillary density (2,014 capillaries/mm2). The minimum intercapillary distance is, therefore, increased in the inner region. Endocardial myocytes (617 μm2) have a 53% greater cross-sectional area than epicardial myocytes (403 μm2).