Diagnostic Accuracy of Nonhyperemic Pressure Ratios Using a Pressure Sensing Microcatheter: The ACIST-FFR Study.

Fractional flow reserve (FFR) measurement can identify coronary lesions responsible for myocardial ischemia that will benefit most from percutaneous coronary intervention. Measuring FFR remains underused in clinical practice in part because of issues related to the pressure wire (e.g., crossing of