Abstract
Myocardial blood flow (MBF) and flow reserve (MFR) measurements by PET/computed tomography provide incremental diagnostic and prognostic information over traditional quantification of ischemia and scar by myocardial perfusion imaging. A normal stress MBF and MFR (>2.0) have a very high negative predictive value for excluding high-risk obstructive coronary artery disease (CAD). These flow measurements are also used for surveillance of coronary allograft vasculopathy after heart transplantation. A global normal MFR (>2.0) identifies patients at lower clinical risk, whereas a severely reduced MFR (<1.5) identifies patients at high risk for adverse events, even among patients without regional perfusion abnormalities.
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