Fractional Flow Reserve | 合法醫療器材資訊網

FFRisdefinedasaratioofthemaximalmyocardialbloodflowinthepresenceofastenosistothetheoreticalnormalmaximalflowinthesamedistribution.

Fractional flow reserve (FFR) is a diagnostic cardiac catheterization technique used to measure blood flow and pressure in an isolated segment of the coronary artery. FFR is the current standard of care for the evaluation of lesions in intermediate-grade stenosis. It is more precise than non-invasive techniques in determining the functional significance and ischemic potential of the observed lesion.1,2

FFR is defined as ratio of pressure measured in coronary segment distal to stenosis (Pd) and pressure measured proximal to stenosis, usually aortic pressure (Pa) or pressure measured in healthy proximal coronary segment. Fractional flow reserve formula is FFR = Pd/Pa.3 FFR is measured using guidewires equipped with micromanometer pressure sensors.2 The coronary guidewires are inserted via transradial or transfemoral catheterization.4[1]

FFR was originally defined as the ratio of proximal and distal blood flow ac...