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  • Title: Effect of telmisartan vs. ramipril on 'dipping' status and blood pressure variability: pooled analysis of the PRISMA studies.
    Author: Gosse P, Schumacher H.
    Journal: Hypertens Res; 2014 Feb; 37(2):151-7. PubMed ID: 24048485.
    Abstract:
    A retrospective pooled analysis of the 'Prospective, Randomized Investigation of the Safety and Efficacy of MICARDIS vs. Ramipril Using ABPM' studies conducted in Europe and South Africa (PRISMA I) and in the United States of America and Canada (PRISMA II) was carried out to investigate the effects of telmisartan and ramipril on dipper status (extreme dippers, dippers, non-dippers, risers/reverse dippers), and blood pressure (BP) variability in 1279 patients (with normal sleeping patterns and valid 24-h ambulatory BP monitoring recordings at baseline and end point). After 14 weeks' treatment, telmisartan had a greater systolic BP (SBP) reduction and higher smoothness index in all four dipper groups compared with ramipril. In addition, the tendency toward dipping was significantly higher in patients treated with) telmisartan than ramipril (P=0.032; odds ratio for telmisartan vs. ramipril: 1.27 (95% confidence interval: 1.102-1.58)). In patients with an early morning SBP surge 35 mm Hg, telmisartan treatment was associated with significantly greater reductions from baseline in the night-time low mean, early morning mean and early morning SBP surge compared with ramipril (P=0.026, P<0.0001 and P=0.0006, respectively). In this retrospective analysis, telmisartan was shown to normalize the circadian BP pattern to a dipper profile in a larger proportion of patients than ramipril, and reduce early-morning SBP surge in high-risk patients, indicative of a cardioprotective effect. These findings need to be confirmed in long-term prospective trials and observational studies.
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