title: Myocardial perfusion as an indicator of graft patency after coronary artery bypass surgery.
abstract: Stress and resting myocardial perfusion were assessed in 38 patients who received 96 grafts. Stress perfusion was evaluated with thallium-201 and resting myocardial blood flow distribution with radiolabeled particles. When both stress and rest perfusion were normal, graft patency was 82% (51 of 62 grafts). Graft patency was also high (81%, 13 of 16) in areas where stress perfusion abnormalities resolved or become less apparent at rest. However, when stress perfusion defects remained unchanged at rest, the graft was likely to be occluded (73%, 11 of 15). Maintenance of normal rest perfusion or improvement of rest perfusion postoperatively was also associated with a high graft patency rate (80%, 35 of 44), whereas the development of new rest perfusion defects postoperatively implied graft occlusion (86%, six of seven).
mesh_terms: D001026:Coronary Artery Bypass; D003326:Coronary Circulation; D005080:Exercise Test; D006801:Humans; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012501:Saphenous Vein / Q000637:transplantation; D013667:Technetium; D014182:Transplantation, Autologous
chemical_list: D013667:Technetium