Non-dipping blood pressure variations in adult Kazakhs are derived from decreased daytime physical activity and increased nighttime sympathetic activity

Clinical and Experimental Hypertension : CHE
Hiroshi KawamuraYuhei Ichimaru

Abstract

Many of the elderly Kazakhs have been found to exhibit non-dipping blood pressure variations (BPV). Such variations are seen in both normotensive and hypertensive Kazakhs. The purpose of this study was (1) to determine whether middle-aged Kazakhs also include large numbers of non-dippers, (2) to compare the characteristics of non-dipping and dipping, and (3) to clarify the mechanisms responsible for non-dipping type BPV by examining the autonomic nervous activity and physical activity. We performed ambulatory blood pressure (BP) monitoring. The subjects were divided into two groups (dipping and non-dipping type). We monitored the subjects' physical activity with accelerometry and assessed their autonomic nerve activity by performing a frequency domain analysis of their heart rate variability (HRV). The power spectral density (PSD) of the HRV was calculated using fast Fourier transformation. We analyzed the systolic blood pressure (SBP) variations with the maximum entropy method (MEM). The dippers and non-dippers accounted for 48% and 52% of the subjects, respectively. MEM analysis revealed that the SBP variations of the non-dippers exhibited a 24 hour periodicity with a very weak PSD as well as an ultradian periodicity. The non...Continue Reading

References

Jun 1, 1995·Hypertension Research : Official Journal of the Japanese Society of Hypertension·H EbataK Shimada
Nov 10, 1995·International Journal of Cardiology·X WuD Fan
Sep 1, 1996·Hypertension Research : Official Journal of the Japanese Society of Hypertension·M AritaY Masuyama
Apr 19, 2000·Hypertension Research : Official Journal of the Japanese Society of Hypertension·H KawamuraS Z Wang
Apr 27, 2000·Japanese Circulation Journal·Y M MuK Kanmatsuse
Dec 20, 2007·American Journal of Hypertension·Daniel J BrotmanDonald G Vidt

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Citations

Jun 7, 2016·Journal of Pineal Research·Fedor SimkoRussel J Reiter

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