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Acute effects of renin-angiotensin system blockade on arterial function in hypertensive patients

Journal of Human Hypertension volume 21, pages 654–663 (2007)Cite this article

Abstract

The acute effects of the renin-angiotensin system (RAS) blockers may be important in some clinical settings. To assess the acute impact of such drugs on arterial function, we studied the effects of captopril 25 mg, quinapril 20 mg and telmisartan 80 mg on 100 hypertensive patients, according to a randomized, double-blind, placebo-controlled study. Central (aortic) blood pressure (BP) and augmentation index (AIx, a measure of wave reflections), as well as flow-mediated dilatation (FMD) of the brachial artery and forearm blood flow (FBF) (measures of conduit and resistance artery endothelial function, respectively), were evaluated before and 2 h after oral drug administration. Compared to placebo, captopril and quinapril decreased central systolic (by 7.5 mm Hg, P<0.05 and by 12.3 mm Hg, P<0.001) and diastolic BP (by 4.9 mm Hg, P<0.01 and by 8.4 mm Hg, P<0.001), whereas telmisartan had no significant effect (P=NS). Additionally, AIx was reduced after quinapril (absolute decrease of 7.2%, P<0.01) and marginally after captopril (decrease of 4.7%, P=0.07). Only quinapril led to a beneficial change of FMD (absolute increase of 2.7%, P<0.001). No treatment was related to significant changes of peak hyperaemic or 3-min hyperaemic FBF. In adjusted analyses, all the favourable alterations induced by quinapril were independent of potential confounding haemodynamic factors. Our data show that acute RAS inhibition with quinapril (20 mg) may be more beneficial in terms of arterial function and central haemodynamics compared to captopril (25 mg) or telmisartan (80 mg). Further studies are needed to investigate whether these acute arterial effects of quinapril are clinically significant.

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Authors and Affiliations

  1. Department of Clinical Therapeutics, Vascular Laboratory, Athens Medical School, Alexandra Hospital, Athens, Greece

    K A Aznaouridis, K S Stamatelopoulos, E N Karatzis, A D Protogerou, C M Papamichael & J P Lekakis

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  1. K A Aznaouridis
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Correspondence to K A Aznaouridis.

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Aznaouridis, K., Stamatelopoulos, K., Karatzis, E. et al. Acute effects of renin-angiotensin system blockade on arterial function in hypertensive patients. J Hum Hypertens 21, 654–663 (2007). https://doi.org/10.1038/sj.jhh.1002211

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