Communication between coronary sinus and left atrium.
D000328:Adult; D001344:Autopsy; D003330:Coronary Vessel Anomalies; D003331:Coronary Vessels / Q000473:pathology; D005260:Female; D006325:Heart Atria / Q000002:abnormalities; D006330:Heart Defects, Congenital / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007223:Infant; D008297:Male; D008943:Mitral Valve / Q000002:abnormalities; D014261:Tricuspid Valve / Q000002:abnormalities