Evaluation of fractional flow reserve in patients with stable angina: can CT compete with angiography?
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We aimed to compare the performance of FFRCT and FFRQCA in assessing the functional significance of coronary artery stenosis in patients suffering from coronary artery disease with stable angina.
A total of 101 stable coronary heart disease (CAD) patients with 181 lesions were recruited. FFRCT and FFRQCA were compared using invasive fractional flow reserve (FFR) as a reference standard. Comparisons between FFRCT and FFRQCA were conducted based on strategies of the geometric reconstruction, boundary conditions, and geometric characteristics. The performance of FFRCT and FFRQCA in detecting hemodynamic significance was also investigated.
The performance of FFRCT and FFRQCA in discriminating hemodynamically significant lesions was compared. Good correlation and agreement with invasive FFR was found using FFRCT and FFRQCA (r = 0.809, p < 0.001 and r = 0.755, p < 0.001). A significant difference was observed in the complex coronary artery tree, in which relatively better prediction was observed using FFRCT than FFRQCA when analyzing the stenosis distributed in the middle segment of a stenotic branch (p = 0.036). Moreover, FFRCT was found to be better at predicting hemodynamically insignificant stenosis than FFRQCA (p = 0.007), while the performance of the two parameters was similar in discriminating functional significant lesions using an FFR threshold of ≤ 0.8 as a reference standard.
FFRCT and FFRQCA could both accurately rule out functional insignificant lesions in stable CAD patients. FFRCT was found to be better for the noninvasive screening of CAD patients with stable angina than FFRQCA.
• FFR CT and FFR QCA were both in good correlation and agreement with invasive FFR measurements.
• FFR CT is superior in accuracy and consistency compared to FFR QCA in patients with stenoses distributed in left coronary artery.
• The noninvasive nature of FFR CT could provide potential benefit for stable CAD patients on disease management.
KeywordsMyocardial fractional flow reserve Computed tomography angiography Coronary artery disease Hemodynamics Myocardial ischemia
Analysis of variance
Area under the receiver operating characteristic curve
Coronary artery disease
Coronary CT angiography
The fractional flow reserve versus angiography for guiding PCI in patients with multivessel coronary artery disease
Fractional flow reserve
Computed tomography–derived FFR
Quantitative coronary angiography-derived FFR
Invasive coronary angiography
Left anterior descending branches
Left coronary artery
Left circumflex branches
Stenosis distribution in LCA and RCA
Negative predictive value
Obtuse marginal artery
Percutaneous coronary intervention
Positive predictive value
Quantitative coronary angiography
Right coronary artery
Stratification according to FFR
Number of lesions in a single branch
This work was supported by grants from Shenzhen–Hong Kong Innovation Circle Program (SGLH20161212104605195), National Key Research and Development Program of China (2016YFC1300300, 2017YFC1103403, 2016YFA0100900), Shenzhen Science and Technology Program (JCYJ20170413114916687, JCYJ20170306092258717), National Natural Science Foundation of China (61771464, U1801265, 81500360, 81227901, 81530058, and 81570272), the Science and Technology Project of Guangdong Province (2016B090925001, 2017B090912006), and China Postdoctoral Science Foundation (2016T90990 and 2016M603026).
Compliance with ethical standards
The scientific guarantor of this publication is Feng Cao.
Conflict of interest
The authors report no relationships that could be construed as a conflict of interest.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Written informed consent was obtained.
Institutional Review Board approved the present study.
• performed at one institution
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