Nocturnal blood pressure dipping: a consequence of diurnal physical activity blipping?
Open Access
- 1 June 2000
- journal article
- research article
- Published by Oxford University Press (OUP) in American Journal of Hypertension
- Vol. 13 (6), 601-606
- https://doi.org/10.1016/S0895-7061(99)00263-0
Abstract
This study was designed to describe the interaction between physical activity (PA), quantified objectively by electronic activity monitors, and ambulatory blood pressure (ABP), and to test the hypothesis that modifying daily PA can effect significant changes in the diurnal variation in blood pressure and may result in altered dipping/nondipping status of an individual. Initially, 70 individuals underwent simultaneous ABP and electronic activity monitoring (actigraph devices manufactured by Gaewihler Electronics, Switzerland) over a 24-h period. Then, in a prospective study, the dipping/nondipping status of 43 subjects was assessed using ABP recorded over two 24-h periods of differing activity levels. Of the 70 subjects (age 49 11 years, 42 male) the diurnal variation in systolic blood pressure (20 ± 12%, step-up from night [120 ± 12 mm Hg] to day [144 ± 13 mm Hg]) and diurnal variation in PA score (increment from sleep, 44 ± 17 units) correlated significantly (R2= 0.29; P< .05). Of the 43 subjects who underwent ABP monitoring on a more active day, four had a nondipping BP profile; 12 of these same 43 subjects had a nondipping BP profile when monitored on a less active day (χ2= 4.9; P< .05). These results provide a quantitative description of the contribution of PA, including the sleep/awake status, to blood pressure variation in a group of normotensive and hypertensive individuals. The magnitude of this effect underscores the importance of interpreting 24-h ABP data only in the presence of adequately quantified activity data.Keywords
This publication has 14 references indexed in Scilit:
- Factors confounding assessment of ambulatory blood pressure monitors, studied during formal evaluation of the tycos Quiet-TrakAmerican Journal of Hypertension, 1997
- Multicenter Assessment of the QuietTrak Ambulatory Blood Pressure Recorder According to the 1992 AAMI GuidelinesAmerican Journal of Hypertension, 1994
- A comparison of ambulatory blood pressure and heart rate at home and work on work and non-work daysJournal Of Hypertension, 1993
- Ambulatory blood pressure monitoring: Assessing the diurnal variation of blood pressureAmerican Journal of Physical Anthropology, 1991
- Circadian blood pressure changes and left ventricular hypertrophy in essential hypertension.Circulation, 1990
- A Computer-assisted Diary (CAD) for Ambulatory Blood Pressure MonitoringAmerican Journal of Hypertension, 1988
- A quantitative analysis of the effects of activity and time of day on the diurnal variations of blood pressureJournal of Chronic Diseases, 1987
- The influence of happiness, anger, and anxiety on the blood pressure of borderline hypertensives.Psychosomatic Medicine, 1986
- Real time Detection of Significant Blood Pressure Events in Ambulant SubjectsClinical and Experimental Hypertension. Part A: Theory and Practice, 1985
- Portable blood pressure recorder Accuracy and preliminary use in evaluating intradaily variations in pressureAmerican Heart Journal, 1962