Calibration of septal defect following atrial septectomy.
D006328:Cardiac Catheterization; D006344:Heart Septal Defects, Atrial; D006346:Heart Septum / Q000601:surgery*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008722:Methods; D010166:Palliative Care; D014188:Transposition of Great Vessels / Q000601:surgery*