Double-outlet right ventricle with supravalvular mitral ring and parachute mitral valve

A 3-year-old female presented with double-outlet right ventricle associated with supravalvular mitral ring, parachute mitral valve, left persistent superior vena cava, and atrial septal defect. The supra-annular mitral valve ring was resected. Only one papillary muscle of the mitral valve could be detected and this was minimally divided to achieve adequate valve opening. An intraventricular tunnel repair technique using a polytetrafluoroethylene patch was carried out to repair the double-outlet right ventricle, which had a subaortic ventricular septal defect. The follow-up results at 2 years are excellent.