Diastolic pressure ratio measurements equivalent to iFR | 合法醫療器材資訊網

2019年5月17日—...hyperaemia-freeratio[DFR])andalineartransformofPd/Pa(theratioofthedistalcoronarypressuretoproximalaorticpressure)againstiFR ...

Using the diastolic pressure ratio (dPR) to identify ischaemia-producing lesions in patients with coronary artery disease provides a similar diagnostic performance to the instantaneous wave-free ratio (iFR). A pooled analysis of pre-recorded pressure tracings from the diagnostic accuracy studies VERIFY 2 and CONTRAST compared dPR (using a commercially available algorithm of the diastolic hyperaemia-free ratio [DFR]) and a linear transform of Pd/Pa (the ratio of the distal coronary pressure to proximal aortic pressure) against iFR for numerical similarity and test/retest repeatability in 893 lesions from 833 patients.

Writing in the European Heart Journal, Nils P Johnson (University of Texas, Houston, USA) et al say: “Our dPR offers numerical equivalency to iFR. Despite different technical approaches for identifying the relevant period of diastole, the agreement between dPR and iF...