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  • Title: Adding thiazide to a renin-angiotensin blocker improves left ventricular relaxation and improves heart failure in patients with hypertension.
    Author: Ito H, Ishii K, Kihara H, Kasayuki N, Nakamura F, Shimada K, Fukuda S, Iwakura K, Yoshikawa J, Effect of ARB/Diuretics on Diastolic Function in Patients with Hypertension (EDEN) trial investigators.
    Journal: Hypertens Res; 2012 Jan; 35(1):93-9. PubMed ID: 22011686.
    Abstract:
    Hypertension is associated with an increased risk of diastolic dysfunction. Angiotensin-converting enzyme inhibitors (ACEi) and angiotensin receptor blockers (ARB) have failed to show improvement in clinical outcomes for patients with diastolic dysfunction. In this study, we investigated the effect of changing an ACEi or ARB to a combination of losartan and hydrochlorothiazide (HCTZ) on left ventricular (LV) preload and relaxation in patients with hypertension and diastolic dysfunction. We enrolled 371 hypertensive patients with diastolic dysfunction who had not achieved their treatment goals with an ACEi or ARB. We switched the ACEi or ARB to losartan/HCTZ and followed the patients for 24 weeks. The primary end points were changes in septal mitral annular velocity during diastole (e') and in the ratio of mitral inflow velocity to e' velocity (E/e' ratio) from baseline to the end of follow-up. Mean systolic and diastolic blood pressures (BP) decreased by 22 and 11 mm Hg, respectively, after changing from an ACEi or ARB to losartan/HCTZ. The e' velocity increased, and the E/e' ratio and brain natriuretic peptide level decreased significantly. High-sensitivity C-reactive protein also decreased significantly (0.50 vs. 0.29 mg dl(-1), P<0.0001). There were only slight or no changes in glucose levels, homeostasis model assessment insulin resistance (HOMA-R), uric acid and electrolytes after the drug change. Changing from an ACEi or ARB to losartan/HCTZ is associated with a reduction in BP, improvement in LV relaxation, improvement in heart failure state and attenuation of systemic inflammation with few adverse effects in patients with hypertension and diastolic dysfunction.
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