FFR in 2017 | 合法醫療器材資訊網

2017年5月25日—Fractionalflowreserve(FFR)utilizesaspecializedguidewiretomeasurebloodpressurewithinacoronaryartery.

Fractional flow reserve (FFR) utilizes a specialized guide wire to measure blood pressure within a coronary artery. The original description of FFR required the induction of maximal hyperemia to achieve near linear correlation between coronary pressure and blood flow.1 The most commonly used pharmacological agent is adenosine as an intravenous infusion, although recent evidence suggests that high-dose intracoronary bolus injection may have similar efficacy (200 mcg into the left coronary artery and 100 mcg in the right coronary artery).2 FFR is defined as the ratio of mean distal coronary pressure to mean aortic pressure. Incorporating stenosis severity, myocardial territory and viability, and collateral perfusion, FFR is able to fully assess the functional significance of a coronary stenosis. Multiple studies have compared FFR with noninvasive functional testing and found an acceptable overall correlation.3 Translesional functional assessment with FFR initially used a cutoff val...