[On extracardial by-pass in cardiac valve stenoses].
D006348:Cardiac Surgical Procedures; D003251:Constriction, Pathologic; D006349:Heart Valve Diseases; D006351:Heart Valves; D006801:Humans; D008946:Mitral Valve Stenosis; D013903:Thoracic Surgery
HEART SURGERY/experimental; MITRAL STENOSIS/experimental