Tricuspid regurgitation UMLS:C0040961 Failure of the tricuspid valve to close sufficiently upon contraction of the right ventricle, causing blood to regurgitate (flow backward) into the right atrium. Fyler:1161 This term should not be applied to Ebstein's anomaly of the tricuspid valve (see HP:0010316). SNOMEDCT_US:111287006 HP:0004753 HP:0005180 Tricuspid valve regurgitation Tricuspid insufficiency Abnormal cardiovascular system physiology