Modification of the daily blood pressure profile in hypertensive patients with type 2 diabetes mellitus

Abstract

Objective. To evaluate the effect of combinations azilsartan medoxomil / chlorthalidone (Az-M/Chl) vs. perindopril / indapamide (Pr / Yn) regarding the modification of the daily blood pressure profile (BP) and augmentation index level in hypertensive patients (hypertension 2 nd degree, HTN), the blood pressure profile “nondipper” or “night-peaker” and type 2 diabetes mellitus (DM). Design and methods . The study included 51 HTN (mean age 73 ± 11,7 years) patients (25 patients in the group Az-M / Chl and 26 patients in the group Pr / Yn, the groups were comparable by the main clinical parameters) with blood pressure profile “non-dipper” or “night-peaker”, DM (compensation stage). All patients have been receiving stable but ineffective antihypertensive therapy for at least 3 months before inclusion. The level of salt consumption was defined by the questionnaire “Charlton: SaltScreener”. Ambulatory 24-hour blood pressure monitoring (ABPM) was performed using BPLab® device (software Vasotens, Russia) which enables analysis of central hemodynamics. Statistica 10.0 software and software R using readxl, psych, ggplot2, ggpubr, gridExtra packages were used for statistical data processing. Results. Twenty-seven (53 %) patients reported consumption of more than 6 g of salt per day: 14 (56 %) patients in the Az-M / Chl group, and 13 (50 %) patients in the Pr / Yn group. Mean daily BP was 161,2 / 102 ± 8,77 / 9,31 mm Hg in the Az-M / Chl group, and 158,3 / 96,7 ± 10,4 / 7,21 mm Hg in the group Pr / In (p > 0,05); mean daily systolic BP (MAP) was 161,2/102,0 ± 8,8 / 9,3 mm Hg and 158,3 / 96,7 ± 10,4 / 7,2 mm Hg, respectively (p > 0,05); aortic augmentation index — 4,88 ± 15,9 % and 2,7 ± 10,9 %, respectively (p > 0,05). At randomization (baseline), the non-dipping BP profile was found in 86,3 % (n = 44) patients, and the night-peaker profile — in 13,7 % (n = 7) patients. At the final visit, all patients achieved target BP level; mean daily systolic BP was 130,2 ± 8,8 and 139,9 ± 8,2 mm Hg in the Az-M/Chl and Pr / In groups, respectively (W = 140, p-value = 0.000497). The Az-M / Chl group demonstrated a more significant reduction in arterial stiffness. In addition, in the AZ-M / Chl group, 18 (72 %) patients showed change to a dipping BP profile, while only 5 (19 %) patients demonstrated the change in the Pr / Yin group. Conclusion . The combination of azilsartan medoxomil/chlorthalidone showed a more significant compared with the combination of perindopril/indapamide: (1) a decrease in mean blood pressure per day; (2) the effect on the modification of the daily profile of blood pressure; (3) alteration of GI in aorta.