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    Predictors of mean arterial pressure morning rate of rise and power function in subjects undergoing ambulatory blood pressure recording

    Access Status
    Open access via publisher
    Authors
    Head, G.
    Andrianopoulos, N.
    McGrath, B.
    Martin, C.
    Carrington, M.
    Lukoshkova, E.
    Davern, P.
    Jennings, G.
    Reid, Christopher
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Head, G. and Andrianopoulos, N. and McGrath, B. and Martin, C. and Carrington, M. and Lukoshkova, E. and Davern, P. et al. 2014. Predictors of mean arterial pressure morning rate of rise and power function in subjects undergoing ambulatory blood pressure recording. PLoS ONE. 9 (3).
    Source Title
    PLoS ONE
    DOI
    10.1371/journal.pone.0093186
    School
    Department of Health Policy and Management
    URI
    http://hdl.handle.net/20.500.11937/6814
    Collection
    • Curtin Research Publications
    Abstract

    Background: We determined clinical predictors of the rate of rise (RoR) in blood pressure in the morning as well as a novel measure of the power of the BP surge (BPpower) derived from ambulatory blood pressure recordings. Methods: BPpower and RoR were calculated from 409 ambulatory blood pressure (ABP) recordings from subjects attending a cardiovascular risk clinic. Anthropometric data, blood biochemistry, and history were recorded. The 409 subjects were 20-82 years old (average 57, SD = 13), 46% male, 9% with hypertension but not on medication and 34% on antihypertensive medication. Results: Average RoR was 11.1 mmHg/hour (SD = 8) and BPpower was 273 mmHg2/hour (SD = 235). Only cholesterol, low density lipoprotein and body mass index (BMI) were associated with higher BPpower and RoR (P<0.05) from 25 variables assessed. BPpower was lower in those taking beta-blockers or diuretics. Multivariate analysis identified that only BMI was associated with RoR (4.2% increase/unit BMI, P = 0.020) while cholesterol was the only remaining associated variable with BPpower (17.5% increase/mmol/L cholesterol, P = 0.047). A follow up of 213 subjects with repeated ABP after an average 1.8 years identified that baseline cholesterol was the only predictor for an increasing RoR and BPpower (P<0.05). 37 patients who commenced statin subsequently had lower BPpower whereas 90 age and weight matched controls had similar BPpower on follow-up. Conclusions: Cholesterol is an independent predictor of a greater and more rapid rise in morning BP as well as of further increases over several years. Reduction of cholesterol with statin therapy is very effective in reducing the morning blood pressure surge. © 2014 Head et al.

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