[Evaluation of the graft flow reserve after coronary artery bypass grafting by stress 201T1 myocardial SPECT: comparison between arterial grafts and venous grafts].
We performed stress 201T1 myocardial SPECT to evaluate ischemia and perfusion reserve after coronary artery bypass grafting (CABG). A total of 103 patients was performed stress 201T1 myocardial SPECT one month after CABG. Each patient's myocardium was divided into 9 segments and visually evaluated using five grade scoring system (0 = defect, 1 = severe decrease, 2 = moderate decrease, 3 = mild decrease, 4 = normal uptake). Eleven of 133 (8.27%) segments covered by patent venous grafts showed reversible 201T1 defect, however, 36 of 117 (30.8%) segments which covered by patent arterial grafts showed reversible 201T1 defect. This finding was observed more significantly in arterial grafts than in venous grafts (p < 0.001). These finding suggests that arterial grafts have lower flow capacity than venous grafts at peak exercise.
Ichikawa
A
A
Department of Nuclear Medicine, Kanazawa University School of Medicine.
Taki
J
J
Nakajima
K
K
Kawasuji
M
M
Tonami
N
N
D000368:Aged; D000787:Angina Pectoris / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D001026:Coronary Artery Bypass; D003326:Coronary Circulation; D019074:Epigastric Arteries / Q000637:transplantation*; D005260:Female; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012501:Saphenous Vein / Q000637:transplantation*; D013794:Thallium Radioisotopes; D013895:Thoracic Arteries / Q000637:transplantation*; D015899:Tomography, Emission-Computed, Single-Photon; D014654:Vascular Patency
D013794:Thallium Radioisotopes