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  • Title: Spironolactone and chlorthalidone in uncontrolled elderly hypertensive patients treated with calcium antagonists and angiotensin II receptor-blocker: effects on endothelial function, inflammation, and oxidative stress.
    Author: Yamanari H, Nakamura K, Miura D, Yamanari S, Ohe T.
    Journal: Clin Exp Hypertens; 2009 Oct; 31(7):585-94. PubMed ID: 19886856.
    Abstract:
    The side effects of thiazide-type diuretics include metabolic abnormality and increased oxidative stress, which might cause endothelial dysfunction despite blood pressure reduction. In hypertensive patients with heart failure, treatment with an aldosterone antagonist resulted in improvements in endothelial function and significant blood pressure reduction. The purpose of the present study was to evaluate the differences between spironolactone and chlorthalidone in hypertensive elderly patients treated with calcium antagonists and angiotensin II receptor blockers. Fourteen uncontrolled hypertensive patients treated with amlodipine and candesartan were included in this study. The study was an open-label randomized crossover comparison of 16 weeks treatment with spironolactone against chlorthalidone added to amlodipine and candesartan. Blood pressure significantly decreased in patients treated with both spironolactone and chlorthalidone. Chlorthalidone reduced flow mediated dilation significantly compared to the baseline condition and spironolactone. Serum high sensitively C-reactive protein and uric acid increased significantly in chlorthalidone-treated patients compared to spironolactone treated patients. We conclude that spironolactone may be a more useful add-on therapy than chlorthalidone in hypertensive patients inadequately controlled on candesartan and amlodipine, because spironolactone preserves endothelial function and reduces inflammation compared to chlorthalidone.
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