Prognostic Implications of Resistive Reserve Ratio in Patients With Coronary Artery Disease.

ABSTRACT: Background Resistive reserve ratio is a thermodilution-based index which integrates both coronary flow and pressure. Resistive reserve ratio represents the vasodilatory capacity of interrogated vessels including both epicardial coronary artery and microvascular circulation. We evaluated the prognostic potential of resistive reserve ratio compared with pressure-derived index (fractional flow reserve [FFR]) or flow-derived index (coronary flow reserve [CFR]). Methods and Results A total of 1245 patients underwent coronary pressure and flow measurement using pressure-temperature wire. Resistive reserve ratio was calculated by CFR adjusted using the ratio between resting and hyperemic distal coronary pressure ([resting mean transit time/hyperemic mean transit time]×[resting distal coronary pre

SUBMITTER: Lee SH 

PROVIDER: S-EPMC7428535 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature