congenital anomaly of superior vena cava right superior vena cava connecting to left-sided atrium https://www.malacards.org/card/right_superior_vena_cava_connecting_to_left_sided_atrium MEDGEN:576401 right SVC connecting to left-sided atrium Right superior vena cava connecting to the left-sided atrium is a rare, congenital vascular malformation of the major vessels characterized by the right SVC passing medially and dorsally to the aortic root and draining into the left atrium. Patients usually present a right-to-left systemic venous blood shunt which may manifest with arterial hypoxemia, cyanosis, exercise dyspnea, clubbing of the fingers, palpitations, murmurs and/or potentially fatal brain abscess. Association with other cardiac anomalies has been reported. Orphanet:99110 MONDO:0020441 GARD:0019653 right superior caval vein connecting to left-sided atrium UMLS:C0344658