[Surgical treatment of left main trunk severe stenosis].
D000328:Adult; D000368:Aged; D003251:Constriction, Pathologic; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000601:surgery*; D005260:Female; D006801:Humans; D007423:Intra-Aortic Balloon Pumping; D008297:Male; D008875:Middle Aged; D012770:Shock, Cardiogenic / Q000517:prevention & control