blood flow rate myocardium measurement myocardial flow rate 2013-03-15T17:29:25Z CMO:0001545 MBF The volume of fluid flowing into, out of or through the blood vessels and microvasculature of the myocardium, the thick contractile middle layer of uniquely constructed and arranged muscle cells that forms the bulk of the heart wall, per unit time. VT:2000004 clinical_measurement_ontology jsmith myocardial blood flow