The normalized smoothness index and parametric population RDH index of losartan in patients with newly diagnosed hypertension and metabolic syndrome

Czech version

Authors: I. Řiháček ¹; P. Fráňa ¹; D. Schwarz ²; M. Plachý ¹; M. Souček ¹
Authors‘ workplace: II. interní klinika Lékařské fakulty MU a FN u sv. Anny Brno, přednosta prof. MU Dr. Miroslav Souček, CSc. ¹; Institut biostatistiky a analýz Lékařské fakulty MU Brno, přednosta doc. RNDr. Ladislav Dušek, Ph. D. ²
Published in: Vnitř Lék 2010; 56(9): 901-909
Category: Original Contributions

Overview

Introduction:
Ambulatory blood pressure monitoring provides an opportunity to evaluate 24-hour efficacy of once daily preparations.

Aims of the study:
To evaluate 24-hour efficacy of losartan in patients with newly diagnosed hypertension and metabolic syndrome using the parametric population RDH index and normalized smoothness index.

Patient sample and methodology:
Twenty seven patients with newly diagnosed hypertension and with metabolic syndrome, sufficiently responding to blood pressure therapy with losartan, assessed using sphygmomanometer. 18 men, 9 women, mean age of 48 years, body mass index of 32.6 kg.m–2, before and after 1 year of therapy with losartan in the mean dose of 69 mg once a day. Blood pressure measured with sphygmomanometer and 24-hour ambulatory monitoring (SpaceLabs 90207) according to the European Society of Hypertension criteria. Hypertension was defined as sphygmomanometer-measured blood pressure values of more than or equal to 130 and/or 85 mm Hg. Fulfilment of at least 3 criteria of metabolic syndrome according to the definition by The Adult Treatment Panel III.

Results:
The population normalized smoothness index of losartan (± standard error of the mean) was 1.10 ± 0.13 for systolic pressure, 0.81 ± 0.11 for diastolic pressure and 1.00 ± 0.14 for mean arterial blood pressure. The parametric population RDH index of 24, 24, 0 for systolic pressure and 24, 24, 0 for diastolic pressure.

Conclusion:
Losartan at a mean dose of 69 mg once daily showed an adequate 24-hour efficacy in patients with newly diagnosed hypertension and metabolic syndrome responding to treatment when blood pressure was measured using sphygmomanometer and the effect expressed as the parametric population RDH index for systolic as well as diastolic pressure and when evaluating normalized smoothness index based on systolic blood pressure value and mean arterial pressure.

Key words:
hypertension – metabolic syndrome – normalized smoothness index – RDH index – losartan

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