Predictors for Vulnerable Plaque in Functionally Significant Lesions.

Background: Vulnerable plaque presents prognostic implications in addition to functional significance.
Objectives: The aim of this study was to identify relevant features of vulnerable plaque in functionally significant lesions.
Methods: In this multicenter, prospective study conducted across 5 countries, including patients who had invasive fractional flow reserve (FFR) ≤0.80, a total of 95 patients with available pullback pressure gradient (PPG) and plaque analysis on coronary computed tomographic angiography and optical coherence tomography were analyzed. Vulnerable plaque was defined as the presence of plaque rupture or thin-cap fibroatheroma on optical coherence tomography. Among the 25 clinical characteristics, invasive angiographic findings, physiological indexes, and coronary computed tomographic angiographic findings, significant predictors of vulnerable plaque were identified.
Results: Mean percentage diameter stenosis, FFR, and PPG were 77.8% ± 14.6%, 0.66 ± 0.13, and 0.65 ± 0.13, respectively. Vulnerable plaque was present in 53 lesions (55.8%). PPG and FFR were identified as significant predictors of vulnerable plaque (P < 0.05 for all). PPG >0.65 and FFR ≤0.70 were significantly related to a higher probability of vulnerable plaque after adjustment for each other (OR: 6.75 [95% CI: 2.39-19.1]; P < 0.001] for PPG >0.65; OR: 4.61 [95% CI: 1.66-12.8]; P = 0.003 for FFR ≤0.70). When categorizing lesions according to combined PPG >0.65 and FFR ≤0.70, the prevalence of vulnerable plaque was 20.0%, 57.1%, 66.7%, and 88.2% in the order of PPG ≤0.65 and FFR >0.70, PPG ≤0.65 and FFR ≤0.70, PPG >0.65 and FFR >0.70, and PPG >0.65 and FFR ≤0.70 (P for trend < 0.001), respectively.
Conclusions: Among low-FFR lesions, the presence of vulnerable plaque can be predicted by PPG combined with FFR without additional anatomical or plaque characteristics. (Precise Percutaneous Coronary Intervention Plan [P3] Study; NCT03782688).
Competing Interests: Funding Support and Author Disclosures This study received funding from HeartFlow and was also supported by grants from the Patient-Centered Clinical Research Coordinating Center (HI19C0481 and HC19C0305) funded by the Ministry of Health and Welfare and from the Ministry of Food and Drug Safety (RS-2023-00215667), Republic of Korea. Dr Mizukami has received consulting fees from Zeon Medical and HeartFlow; and has received speaker fees from Abbott Vascular. Dr Leipsic is a consultant for and holds stock options in Circle CVI and HeartFlow; has received a research grant from GE; and has received modest speaker fees from GE and Philips. Drs Sonck and Munhoz have received research grants provided by the Cardiopath PhD program. Dr Nørgaard has received unrestricted institutional research grants from Siemens and HeartFlow. Dr Otake has received research grants from Abbott Vascular; and has received speaker fees from HeartFlow and Abbott Vascular. Dr Ko has received consulting fees from Canon Medical, Abbott, and Medtronic. Dr Koo has received institutional research grants from HeartFlow. Dr Maeng has received advisory board and lecture fees from AstraZeneca, Bayer, Boehringer Ingelheim, Bristol Myers Squibb, Boston Scientific, and Novo Nordics; and has received institutional research grants from Bayer, Philips Healthcare, and Novo Nordisk. Dr Jensen has received unrestricted institutional research grants from Siemens and HeartFlow. Dr Andreini has received research grants from GE Healthcare and Bracco. Dr Shinke has received research grants from Boston Scientific and Abbott Vascular. Dr Barbato has received speaker fees from Boston Scientific, Abbott Vascular, and GE. Dr De Bruyne has received consulting fees from Boston Scientific and Abbott Vascular; has received research grants from Coroventis Research, Pie Medical Imaging, CathWorks, Boston Scientific, Siemens, HeartFlow, and Abbott Vascular; and owns equity in Siemens, GE, Philips, HeartFlow, Edwards Lifesciences, Bayer, Sanofi, and Celyad. Dr Collet has received research grants from Biosensor, Coroventis Research, Medis Medical Imaging, Pie Medical Imaging, CathWorks, Boston Scientific, Siemens, HeartFlow, and Abbott Vascular; and has received consulting fees from HeartFlow, OpSens, Abbott Vascular, and Philips Volcano. All other authors have reported that they have no relationships relevant to the contents of this paper to disclose.
(Copyright © 2024 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.)