Drainage of coronary sinus and vena cava superior sinistra into the left atrium and other congenital anomalies of the heart's venous system.
D003330:Coronary Vessel Anomalies / Q000175:diagnosis; D006325:Heart Atria / Q000002:abnormalities*; D006801:Humans; D014680:Veins / Q000002:abnormalities*; D014683:Vena Cava, Superior / Q000002:abnormalities*