E wave deceleration time E wave deceleration rate clinical_measurement_ontology jsmith 2014-07-01T11:26:09Z EDR 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. CMO:0002505 calculated heart blood flow measurement