2-Year Outcomes of Angiographic Quantitative Flow Ratio-Guided Coronary Interventions

J Am Coll Cardiol. 2022 Nov 29;80(22):2089-2101. doi: 10.1016/j.jacc.2022.09.007. Epub 2022 Sep 19.


Background: In the multicenter, randomized, sham-controlled FAVOR (Comparison of Quantitative Flow Ratio Guided and Angiography Guided Percutaneous Intervention in Patients with Coronary Artery Disease) III China trial, quantitative flow ratio (QFR)-based lesion selection improved 1-year clinical outcomes compared with conventional angiographic guidance for percutaneous coronary intervention (PCI).

Objectives: The purpose of this study was to determine whether the benefits of QFR guidance persist at 2 years, particularly for patients in whom QFR changed the revascularization strategy.

Methods: Eligible patients were randomized to a QFR-guided strategy (PCI performed only if QFR ≤0.80) or a standard angiography-guided strategy. Major adverse cardiac events (MACE), a composite of all-cause death, myocardial infarction (MI), or ischemia-driven revascularization occurring within 2 years were analyzed in the intention-to-treat population.

Results: Among 3,825 randomized participants, 2-year MACE occurred in 161 of 1,913 (8.5%) patients in the QFR-guided group and in 237 of 1,912 (12.5%) patients in the angiography-guided group (HR: 0.66; 95% CI: 0.54-0.81; P < 0.0001), driven by fewer MIs (4.0% vs 6.8%; HR: 0.58; 95% CI: 0.44-0.77; P = 0.0002) and ischemia-driven revascularizations (4.2% vs 5.8%; HR: 0.71; 95% CI: 0.53-0.95; P = 0.02) in the QFR-guided group. Landmark analysis showed consistent results within the first year and between 1-2 years (Pint = 0.99). Although the 2-year MACE rate was lower in the QFR-guided group in both patients with and without revascularization strategy changes, the extent of outcome improvement was greater (Pint = 0.009) among those patients in whom the preplanned PCI strategy was modified by QFR.

Conclusions: QFR-guided lesion selection improved 2-year clinical outcomes compared with standard angiography guidance. The benefits were most pronounced among patients in whom QFR assessment altered the planned revascularization strategy. (FAVOR III China Study [The Comparison of Quantitative Flow Ratio Guided and Angiography Guided Percutaneous Intervention in Patients with Coronary Artery Disease] NCT03656848).

Keywords: angiography; coronary artery disease; percutaneous coronary intervention; quantitative flow ratio.

Publication types

  • Randomized Controlled Trial
  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Angiography
  • Coronary Artery Disease* / diagnostic imaging
  • Coronary Artery Disease* / surgery
  • Heart
  • Humans
  • Myocardial Infarction*
  • Percutaneous Coronary Intervention*

Associated data

  • ClinicalTrials.gov/NCT03656848