Unmasking Myocardial Bridge–Related Ischemia by Intracoronary Functional Evaluation

BACKGROUND—Invasive physiological assessment of myocardial bridges (MBs) is largely unsettled. Unlike fractional flow reserve (FFR), instantaneous wave–free ratio (iFR) is a diastole-specific index. As such, its value might not be hampered by systolic pressure overshooting and negative systolic pres...

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