right atrium weight 2010-09-01T08:30:45Z CMO:0000336 The weight of the right atrium, the upper right chamber of the heart which empties into the lower right chamber, i.e. the right ventricle. Weight is the heaviness or degree to which a body is drawn to the earth by gravity. VT:0007027 clinical_measurement_ontology mshimoyama heart right atrium morphological measurement