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Fractional Flow Reserve (FFR) Versus Instant Wave-Free Ratio (iFR)
Comparison of Fractional Flow Reserve versus instant Wave-Free Ratio for assessment of coronary artery stenosis severity in routine practice * To compare FFR to iFR in arbitrary consecutive patients referred for percutaneous coronary intervention (PCI). * To investigate the influence of hyperemia on iFR. * To test reproducibility of iFR and FFR.
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