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Multicenter Study
. 2018 Mar-Apr;12(2):95-100.
doi: 10.1016/j.jcct.2018.01.008. Epub 2018 Feb 2.

Incidence and predictors of lesion-specific ischemia by FFRCT: Learnings from the international ADVANCE registry

Hironori Kitabata  1 , Jonathon Leipsic  2 , Manesh R Patel  3 , Koen Nieman  4 , Bernard De Bruyne  5 , Campbell Rogers  6 , Gianluca Pontone  7 , Bjarne L Nørgaard  8 , Jeroen J Bax  9 , Gilbert Raff  10 , Kavitha M Chinnaiyan  10 , Mark Rabbat  11 , Niels Peter Rønnow Sand  12 , Philipp Blanke  13 , Timothy A Fairbairn  14 , Hitoshi Matsuo  15 , Tetsuya Amano  16 , Tomohiro Kawasaki  17 , Yoshihiro Morino  18 , Takashi Akasaka  1
Affiliations
Multicenter Study

Incidence and predictors of lesion-specific ischemia by FFRCT: Learnings from the international ADVANCE registry

Hironori Kitabata et al. J Cardiovasc Comput Tomogr. 2018 Mar-Apr.

Abstract

Background: To date, the clinical utility of coronary computed tomography angiography (CTA)-derived fractional flow reserve (FFRCT) has been limited to trials and single center experiences. We herein report the incidence of abnormal FFRCT (≤0.80) and the relationship of lesion-specific ischemia to subject demographics, symptoms, and degree of stenosis in the multicenter, prospective ADVANCE registry.

Methods: One thousand patients with suspected angina having documented coronary artery disease on coronary CTA and clinically referred for FFRCT were prospectively enrolled in the registry. Patient demographics, symptom status, coronary CTA and FFRCT findings were recorded. Univariate and multivariate analyses were performed to investigate the predictors related to abnormal FFRCT.

Results: FFRCT data were analyzed in 952 patients (95.2%). Overall, 51.1% patients had a positive FFRCT value (≤0.80). Patients with ≥3 risk factors had a significantly higher rate of abnormal FFRCT than those with <3 risk factors (60.2% vs. 43.9%, p = 0.0001). On multivariate analysis, baseline diabetes (odds ratio [OR] 1.52, 95% confidence interval [CI] 1.04-2.21, p = 0.030) and hypertension (OR 1.56, 95%CI 1.14-2.14, p = 0.005) were both predictive of abnormal FFRCT. In addition, >70% stenosis was significantly associated with low FFRCT (OR 31.16, 95%CI 12.25-79.22, p < 0.0001) vs. <30% stenosis. Notably, stenosis 30-49% vs. <30% had an increased likelihood of ischemia (OR 3.74, 95%CI 1.52-9.17, p < 0.0001).

Conclusions: In this real-world registry, CT angiographic stenosis severity in addition to baseline cardiovascular risk factors conferred an increased likelihood of an abnormal FFRCT. Importantly, however, mild CT angiographic stenoses were noted to have an increased hazard for ischemia and the converse holding true for more severe stenoses as well.

Keywords: Coronary artery disease; FFR(CT); Ischemia; NCT02499679; https://clinicaltrials.gov.

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