Related Experiment Video
Updated: Apr 26, 2026
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
Published on: October 22, 2014
Endothelial function in contemporary patients with repaired coarctation of aorta
R M Radke1, G-P Diller1, M Duck1
1Division of Adult Congenital and Valvular Heart Disease, University Hospital Muenster, Muenster, Germany.
Insights
Endothelial dysfunction was not found in adults after aortic coarctation repair, contrary to previous studies. Further research is needed to understand arterial hypertension mechanisms in these patients.
Area of Science:
- Cardiovascular Research
- Vascular Biology
- Pediatric Cardiology
Background:
- Previous studies suggested endothelial dysfunction in adult patients post-aortic coarctation (CoA) repair, potentially contributing to arterial hypertension.
- Endothelial dysfunction is a risk factor for cardiovascular events and is implicated in the pathogenesis of hypertension.
- Assessing endothelial function and related markers in contemporary CoA repair patients is crucial for understanding long-term cardiovascular health.
Purpose of the Study:
- To evaluate endothelial function in adult patients following aortic coarctation repair.
- To quantify endothelial progenitor cells (EPCs) in these patients.
- To measure levels of proinflammatory cytokines associated with endothelial injury.
Main Methods:
- Prospective observational study involving 20 CoA repair patients and 22 healthy controls.
- Digital reactive hyperaemia assessed using peripheral arterial tonometry.
- Flow cytometry used for EPC quantification; comprehensive laboratory markers measured for endothelial dysfunction.
Main Results:
- No significant difference in reactive hyperaemia indices between CoA patients and controls.
- Circulating EPC levels were not significantly different between the groups.
- Plasma levels of inflammatory mediators (IL-6, IL-8, ICAM1, VCAM1) and vascular endothelial growth factor showed no significant differences.
Conclusions:
- Contrary to earlier reports, no significant endothelial dysfunction was detected in adult patients after CoA repair compared to controls.
- Endothelial dysfunction may not be a universal complication in this patient population.
- Further studies are necessary to elucidate mechanisms of arterial hypertension and develop preventative strategies.
Objective:
Previous studies have suggested endothelial dysfunction in adult patients after repair of aortic coarctation (CoA). It has been proposed to play a key role in the pathogenesis of arterial hypertension in the absence of re-coarctation. We aimed to assess the presence of endothelial dysfunction, the number of endothelial progenitor cells (EPC), and the levels of proinflammatory cytokines associated with endothelial injury in contemporary patients after CoA repair.
Methods:
For this prospective observational study, 20 CoA patients and 22 healthy controls were recruited. Digital reactive hyperaemia was measured by peripheral arterial tonometry. Flow cytometry was used to quantify EPCs, and a comprehensive panel of laboratory markers of endothelial dysfunction was measured.
Results:
Half the patients had known arterial hypertension requiring medical treatment. Indices of reactive hyperaemia showed no significant difference between CoA patients (1.96±0.32) and controlss (1.765±0.48) (p=0.82). Circulating EPCs, defined by the number of CD34(+), CD34(+)/KDR(+), CD34(+)/AC133(+), CD34(+)/AC133(+)/KDR(+) or CD34(+)/CD45(-) labelled cells were equally not significantly different between the groups. Furthermore, plasma levels of inflammatory mediators and markers of endothelial function (IL-6, IL-8, ICAM1 and VCAM1) were not significantly different between the groups, as were vascular endothelial growth factor levels (p>0.05, for all).
Conclusions:
By contrast with earlier reports, no clinically significant difference in endothelial function between adult patients with coarctation repair and healthy controls could be demonstrated. Therefore, endothelial dysfunction may not necessarily be present in this population. Further studies are required to identify mechanisms and to develop strategies to avoid arterial hypertension in these patients.
