COVID-19 Accelerates Vascular Aging by Years, Major Study Finds
The CARTESIAN study reveals COVID-19 infection stiffens arteries equivalent to years of biological aging, raising long-term cardiovascular risk.
Summary
The CARTESIAN study, a large international multicenter investigation, found that adults previously infected with COVID-19 showed significantly greater arterial stiffness compared to uninfected controls, even months after recovery. Using pulse wave velocity as the primary marker of vascular aging, researchers determined that post-COVID individuals had arteries biologically older than their chronological age would predict. The effect was dose-dependent: those with more severe COVID-19 illness showed worse vascular outcomes. These findings suggest COVID-19 may permanently accelerate vascular aging, increasing long-term risk for heart attack, stroke, and other cardiovascular events — with implications for monitoring and preventive strategies in the hundreds of millions who have been infected worldwide.
Detailed Summary
Cardiovascular complications are among the most serious long-term consequences of COVID-19, yet the mechanisms driving persistent risk have remained incompletely understood. Arterial stiffness — a well-validated marker of vascular aging and a strong independent predictor of cardiovascular events — offered a promising window into whether COVID-19 accelerates the biological aging of blood vessels beyond what chronological age alone would predict.
The CARTESIAN (Carotid ARTErial Stiffness In COVID-19 And Long COVID) study enrolled participants across multiple countries in Europe, Canada, Brazil, Mexico, and beyond, comparing adults with documented prior COVID-19 infection against age- and sex-matched controls without prior infection. The primary outcome was carotid-femoral pulse wave velocity (cfPWV), the gold-standard measure of aortic stiffness. Secondary measures included central blood pressure, augmentation index, and other vascular parameters. Assessments were performed months after acute infection to capture persistent vascular effects rather than acute inflammatory responses.
Post-COVID participants demonstrated significantly higher cfPWV compared to controls after adjustment for traditional cardiovascular risk factors including age, sex, blood pressure, and body mass index. The magnitude of vascular aging acceleration was clinically meaningful — equivalent to several additional years of biological vascular aging. Importantly, the degree of arterial stiffening correlated with COVID-19 severity: those who had been hospitalized showed greater vascular aging than those with mild outpatient illness, suggesting a dose-response relationship between inflammatory burden and vascular damage.
Additionally, individuals with long COVID symptoms exhibited particularly pronounced arterial stiffness, hinting that ongoing viral or immune-mediated injury may perpetuate vascular dysfunction beyond the initial infection. Central blood pressure and wave reflection indices were also elevated in post-COVID groups, compounding the hemodynamic burden on the heart and large vessels.
These results carry substantial public health implications. With over a billion people having contracted COVID-19 globally, even a modest acceleration of vascular aging at the population level could translate into a significant increase in myocardial infarctions, strokes, and heart failure over coming decades. The findings argue for active cardiovascular surveillance in COVID-19 survivors, particularly those who experienced severe disease or persistent symptoms, and underscore the urgency of research into therapies that might reverse or mitigate post-infectious vascular injury.
Key Findings
- COVID-19 survivors showed significantly higher arterial stiffness (pulse wave velocity) vs. matched controls after adjusting for traditional risk factors.
- The degree of vascular aging acceleration correlated with COVID-19 severity, suggesting a dose-response relationship.
- Long COVID patients exhibited the most pronounced arterial stiffness, implying ongoing vascular injury beyond acute illness.
- Post-COVID vascular aging was equivalent to several additional years of biological aging above chronological age.
- Central blood pressure and wave reflection indices were also elevated, compounding cardiovascular hemodynamic burden.
Methodology
CARTESIAN was an international multicenter observational study comparing carotid-femoral pulse wave velocity and other vascular parameters in adults with prior COVID-19 infection versus age- and sex-matched uninfected controls across multiple countries. Measurements were taken months post-infection to capture persistent effects, with multivariable adjustment for classical cardiovascular risk factors. Severity subgroup analyses and long COVID subgroups were pre-specified.
Study Limitations
As an observational study, CARTESIAN cannot definitively establish causality, and residual confounding from pre-existing subclinical vascular disease before COVID-19 infection cannot be excluded. Baseline (pre-infection) vascular measurements were not available for most participants, limiting the ability to quantify individual change. Heterogeneity in COVID-19 strains, vaccination status, and time since infection across centers may also influence results.
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