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Original ResearchAvailable online 11 February 2022

JOURNAL：Atherosclerosis. Article Link

Active factor XI is associated with the risk of cardiovascular events in stable coronary artery disease patients

E Paszeka, E Pociask, A Undas et al. Keywords: CAD; Factor XIa; thromboembolism; tissue factor; mortality

ABSTRACT

BACKGROUND AND AIMS - Tissue factor (TF) and activated factor XI (FXIa) have been associated with acute coronary syndrome, ischemic stroke and venous thromboembolism. Their predictive value in stable coronary artery disease (CAD) is unclear. We investigated whether active TF and FXIa were associated with clinical outcomes in CAD patients in long-term observation.

METHODS - In 124 stable patients with multivessel CAD, we assessed the presence of circulating, active TF and FXIa by measuring a response of thrombin generation to respective inhibitory antibodies. We recorded the composite endpoint of myocardial infarction (MI), stroke, systemic thromboembolism and cardiovascular death during follow-up (median 106 months, interquartile range 95–119).

RESULTS - Circulating FXIa and active TF were detected in 40% and 20.8% of the 120 patients (aged 65.0 [57.0–70.3] years, men, 78.3%), who completed follow-up. The composite endpoint occurred more frequently in patients with detectable active TF and FXIa present at baseline (hazard ratio [HR] 4.02, 95% confidence interval [CI] 2.26–7.17, p < 0.001 and HR 6.21, 95% CI 3.40–11.40, p < 0.001, respectively). On multivariate analysis FXIa, but not active TF, was an independent predictor of the composite endpoint, as well as MI, stroke/systemic thromboembolism, and cardiovascular death, when analyzed separately.

CONCLUSIONS - To our knowledge, this study is the first to show that circulating FXIa predicts arterial thromboembolic events in advanced CAD, supporting a growing interest in FXIa inhibitors as novel antithrombotic agents.

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