Abstract
This study aimed to investigate whether coarctation of the aorta in infancy indicates an altered vascular reactivity in the peripheral and coronary arteries apart from the secondary effect of hypertension or other complications of the disease. Patients with repaired coarctation of the aorta have a high prevalence of premature cardiovascular complications. The etiology still is not fully understood, and the cause is most likely multifactorial. Endothelial function was assessed by peripheral flow mediated dilation (FMD) and coronary flow reserve (CFR) in a study of 10 control subjects and 10 patients with a successfully repaired coarctation of the aorta (mean age, 20.9 years; 20.5 years after repair). No one had re- or rest-coarctation of the aorta, hypertension, pathologic blood pressure response during exercise, or associated cardiac malformations such as bicuspid aortic valve. CFR was achieved by phase-contrast velocity encoding cine magnetic resonance imaging in the coronary sinus before and during infusion with adenosine (0.14 mg/kg/min). FMD was measured in the brachial artery before and after 5 min of arterial occlusion. A normal CFR and FMD was found in both groups. Most studies have been conducted with large, unselected groups. The current study group represented the best outcome of the coarctation spectrum (i.e., patients with no evidence of a residual gradient across the coarctation site or systemic hypertension). The findings reassuringly suggest that significant endothelial dysfunction and atherosclerotic changes were not present in this selected cohort.
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This project was supported by grants from the University of Bergen, the Grieg Foundation, and the Tordis and Fritz C Riebers’s Foundation.
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Cuypers, J., Leirgul, E., Larsen, T.H. et al. Assessment of Vascular Reactivity in the Peripheral and Coronary Arteries by Cine 3T-Magnetic Resonance Imaging in Young Normotensive Adults after Surgery for Coarctation of the Aorta. Pediatr Cardiol 34, 661–669 (2013). https://doi.org/10.1007/s00246-012-0522-2
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DOI: https://doi.org/10.1007/s00246-012-0522-2