E wave deceleration time E wave deceleration rate 2014-07-01T11:26:09Z CMO:0002505 EDR JSmith Measurement of the decrease in transmitral blood flow velocity per unit time or the rate at which the velocity of passive blood flow from the atrium to the ventricle decreases over time as the ventricle fills and the atrium empties, calculated as the slope of transmitral velocity vs time. clinical_measurement_ontology calculated heart blood flow measurement