Detection of early postoperative internal mammary artery atherosclerosis using Tc-99m myocardial perfusion SPECT imaging

Myocardial perfusion single photon emission computed tomography (SPECT) is a useful noninvasive test to detect the recurrence of myocardial ischemia after coronary artery bypass grafting (CABG). However, the role of myocardial SPECT imaging to detect early recurrence of ischemia after surgery is limited, and its utility in asymptomatic CABG patients remains poorly established.