[A study of the patency of sequential bypass grafting for small coronary arteries].
D017023:Coronary Angiography; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000601:surgery*; D003331:Coronary Vessels / Q000473:pathology; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D011877:Radionuclide Imaging; D014654:Vascular Patency