Endothelial dysfunction increases hypertension and systemic cardiovascular risk worldwide by impairing nitric oxide bioavailability and triggering vascular inflammation, according to a systematic review and meta-analysis published in Cureus.
How Endothelial Failure Raises Blood Pressure and Plaque
- The Endothelium’s Role: The delicate layer of cells lining your blood vessels regulates blood pressure, keeps inflammation in check, and prevents harmful clotting.
- The Breakdown: When this lining fails—often due to oxidative stress and reduced nitric oxide—vessels stiffen, blood pressure rises, and plaque accumulates.
Systematic Review Methodology and Database Search
Cureus reported that researchers executed a comprehensive literature search across PubMed, Google Scholar, and Web of Science. The search captured relevant literature published from database inception through January 15, 2025. Investigators applied Medical Subject Headings alongside free-text keywords like “endothelial dysfunction,” “flow-mediated dilation,” and “nitric oxide.” The formal database search was executed on January 15, 2025. The review process followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.
Eligibility criteria utilized the Population, Intervention, Comparator, Outcomes, and Study design framework. Included studies evaluated adult populations with diagnosed or incident hypertension, alongside high-risk groups such as individuals with diabetes, obesity, or chronic kidney disease. Eligible investigations assessed endothelial function via non-invasive vascular tests, biochemical assays, or imaging methods like flow-mediated dilation and peripheral arterial tonometry. The primary analysis tracked cardiovascular complications and surrogate markers of vascular damage.
| PICOS Component | Inclusion Criteria | Exclusion Criteria |
|---|---|---|
| Population | Adults with hypertension, normotensive individuals, and high-risk groups (diabetes, chronic kidney disease). | Non-hypertensive individuals, animal models, in vitro research. |
| Intervention | Non-invasive vascular tests, biochemical assays, imaging-based methods (FMD, PAT, PWV). | Studies lacking direct or indirect assessment of endothelial function. |
| Outcomes | Cardiovascular complications (myocardial infarction, stroke, heart failure) and subclinical target-organ damage. | Studies omitting cardiovascular endpoints or functional associations. |
Pathophysiological Mechanisms and Biomarkers
The endothelium preserves vascular health by regulating vascular tone and maintaining antithrombotic states. Endothelial dysfunction disrupts this equilibrium through impaired vasodilation and elevated oxidative stress. This pathological shift stems primarily from reduced bioavailability of nitric oxide. Hypertension places sustained mechanical stress on the vascular wall. This stress triggers neurohormonal activation and excessive production of reactive oxygen species. These reactive oxygen species degrade nitric oxide, driving vascular stiffness and chronic inflammation.
Inflammatory cascades further accelerate vascular pathology by prompting endothelial cells to express adhesion molecules and recruit immune cells. Evidence from cohorts like the Framingham Heart Study identified circulating biomarkers of endothelial dysfunction as independent predictors of incident hypertension and adverse events.
These markers include von Willebrand factor, soluble intercellular adhesion molecule-1, and asymmetric dimethylarginine. Despite extensive literature, important knowledge gaps persist regarding the consistency of these associations across diverse populations and the exact temporal relationship between endothelial dysfunction and elevated blood pressure.
Routine Clinical Measurement Is Not yet Universally Mandated
While assessing endothelial markers provides prognostic value, routine clinical measurement is not yet universally mandated for standard hypertension management.
Conclusion on Vascular Risk Stratification
Endothelial dysfunction functions as both an independent predictor of cardiovascular events and a key driver of hypertension pathogenesis. Synthesizing data across diverse assessment modalities clarifies its prognostic value for clinicians managing complex vascular disease. Future investigations must address remaining gaps regarding the temporal dynamics linking impaired vasodilation to sustained blood pressure elevations.
References
- Cureus: Endothelial Dysfunction as a Mediator of Hypertension and Cardiovascular Risk: A Systematic Review and Meta-Analysis.
- European Society of Cardiology: 2024 ESC Guidelines on the Management of Elevated Blood Pressure and Hypertension.
- Framingham Heart Study: Circulating Biomarkers of Endothelial Dysfunction and Incident Cardiovascular Events.
