Abstract 16712: Cardio-Ankle Vascular Index as an Independent Predictor of Cardiovascular Events in Patients With and Without Previous Cardiovascular Disease: A Systematic Review and Meta-Analysis

Background: Large artery stiffness predicts the risk of major adverse cardiovascular events (MACE). However, most data to date are related to carotid-femoral pulse wave velocity. Data about the prognostic value of cardio-ankle vascular index (CAVI), a less blood pressure-dependent marker, are limited, especially among individuals without prior cardiovascular disease (primary prevention).

Hypothesis: Higher baseline CAVI is associated with incident MACE and all-cause death.

Methods: PubMed, Scopus, and Web of Science were searched up to 29 April 2023 for longitudinal studies reporting the association of CAVI with incident fatal and nonfatal cardiovascular events. Risk of bias was assessed using the MINORS tool. Pooled hazard ratios were calculated separately based on use of CAVI as a categorical or continuous variable. Subgroup analysis focused on studies of patients without prior cardiovascular disease.

Results: We included 21 studies (37,658 participants; mean age range 52-75 years; 53.9% males). Median study follow-up duration was 5 years (IQR 4.4-6; range 2-12.4). Despite variations in multivariable models, studies reported adjustments for conventional risk factors. Higher CAVI was associated with risk of MACE among all studies (categorical HR=1.45 [1.23-1.70], I ² =51%; continuous HR=1.24 [1.15-1.33], I ² =18%) and in primary prevention studies (categorical HR=1.48 [1.12-1.96], I ² =67%; continuous HR=1.22 [1.12-.33], I ² =25%). While CAVI was associated with all-cause mortality in the overall analysis (HR=1.34; 95% CI: 1.09-1.63, I ² =41%), primary prevention studies did not show a significant association (HR=1.09; 95% CI: 0.9-1.32 I ² =15%).

Conclusion: CAVI holds promise as an independent predictor for MACE, including individuals without established cardiovascular disease. Further epidemiological studies are needed to better understand its prognostic role, normative values in different groups, and its role in primary prevention strategies.