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Published on: April 13, 2015
A Novel Angiography-Derived Computational Coronary Flow Reserve to Evaluate Non-Obstructive Coronary Artery Disease
Jingpu Wang1, Yumeng Hu2, Xinyi Yang2
1Department of Cardiology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai, 200032, China.
Insights
A new angiography-based method (Angio-CFR) offers a cost-effective and reproducible way to measure coronary flow reserve (CFR). This technique shows promising diagnostic accuracy for assessing coronary artery disease risk.
Area of Science:
- Cardiovascular medicine
- Medical imaging
- Diagnostic techniques
Background:
- Coronary flow reserve (CFR) is crucial for risk stratification in coronary artery disease.
- Current CFR measurement methods are limited by high cost, long procedure times, and poor reproducibility.
Purpose of the Study:
- To introduce and evaluate a novel angiography-based method (Angio-CFR) for assessing coronary flow reserve.
- To determine the diagnostic performance of Angio-CFR compared to thermodilution-derived CFR.
Main Methods:
- 107 patients undergoing invasive coronary angiography were prospectively enrolled.
- Flow velocity at rest and hyperemia was estimated from angiographic images.
- Angio-CFR was calculated as the ratio of hyperemic to resting flow velocity.
Main Results:
- Angio-CFR demonstrated a strong correlation with thermodilution-derived CFR (r=0.72, p<0.001).
- Angio-CFR effectively discriminated CFR values below 2.5 (AUC=0.879, p<0.001).
- The method achieved high accuracy (81.71%), sensitivity (83.33%), and specificity (81.25%).
Conclusions:
- Angio-CFR provides a pressure-wire-free alternative for coronary function assessment.
- This novel method shows promising diagnostic accuracy and accessibility for clinical CFR measurement.
Abstract:
Coronary flow reserve (CFR) is a key parameter for risk stratification in coronary artery disease but is limited by high cost, prolonged procedure time, and suboptimal reproducibility. We proposed a novel angiography-based method (Angio-CFR) to overcome these challenges and assessed its diagnostic performance. 107 consecutive patients underwent invasive coronary angiography with thermodilution-derived CFR (CFRthermo) were prospectively enrolled. Flow velocity at hyperemia and rest was estimated from angiographic images, and Angio-CFR was calculated as their ratio. Angio-CFR correlated well with CFRthermo (r = 0.72, p < 0.001), and showed good discrimination of CFRthermo < 2.5 (AUC = 0.879, p < 0.001) with an optimal cut-off of 2.5. The accuracy, sensitivity, and specificity of Angio-CFR were 81.71%, 83.33%, and 81.25%, respectively. Angio-CFR provides a pressure-wire-free method for coronary function assessment, demonstrating promising diagnostic accuracy and offering a more accessible approach for CFR measurement in clinical practice.
