Fractional Flow Reserve to Determine the Appropriateness of Angioplasty in Moderate Coronary Stenosis

Background —PTCA of a coronary stenosis without documented ischemia at noninvasive stress testing is often performed, but its benefit is unproven. Coronary pressure–derived fractional flow reserve (FFR) is an invasive index of stenosis severity that is a reliable substitute for noninvasive stress te... View More