The superior approach for operative decompression of the left side of the heart.
D006328:Cardiac Catheterization; D001026:Coronary Artery Bypass; D005112:Extracorporeal Circulation; D006321:Heart; D006325:Heart Atria; D006330:Heart Defects, Congenital / Q000601:surgery; D006801:Humans; D008722:Methods; D008943:Mitral Valve; D011312:Pressure; D013536:Suture Techniques