Congenital levoposition of the right atrial appendage. Its relevance to balloon septostomy.
D006328:Cardiac Catheterization; D006325:Heart Atria; D006330:Heart Defects, Congenital / Q000601:surgery*; D006346:Heart Septum / Q000601:surgery*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D014188:Transposition of Great Vessels / Q000601:surgery