Coronary Artery Disease Clinical Trial
Official title:
SPECT Myocardial Blood Flow Quantification for Diagnosis of Ischemic Heart Disease Determined by Fraction Flow Reserve
Recent evidences have demonstrated improved diagnostic accuracy for detecting coronary artery disease (CAD) when myocardial blood flow (MBF) is quantified in absolute terms using single photon emission tomography (SPECT) compared to conventional myocardial perfusion imaging (MPI). However, there are no uniformly accepted cutoff values of MBF and MFR derived from SPECT for diagnosing hemodynamically significant CAD. Particularly, the diagnostic performance for quantitative SPECT has not been validated using fractional flow reserve (FFR). The aim of this prospective study is to determine optimal cutoff values of absolute MBF and MFR derived from NaI (Tl)-based SPECT and to evaluate the diagnostic efficacy of this quantitative technology utilizing invasive coronary angiography (ICA) in combination with FFR results as the reference standard in patients with suspected or known CAD.
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