Mechanisms underlying elevated SBP differ with adiposity in young adults: the Enigma study

Jessica E. Middlemiss*, Karen L. Miles, Barry J. McDonnell, Yasmin, Kaisa M. Maki-Petaja, John R. Cockcroft, Ian B. Wilkinson, Carmel M. McEniery

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)
5 Downloads (Pure)

Abstract

Objectives: The positive association between adiposity and hypertension is well recognized. However, not all overweight individuals have elevated blood pressure (BP). Moreover, different factors may be associated with high BP in normal-weight versus overweight individuals. The aim of the current study was to examine the influence of adiposity on the relationship between SBP and underlying haemodynamic mechanisms in young adults. 

Method: Data from 2502 patients were available from the Enigma study. Detailed demographic, biochemical, and haemodynamic data were obtained in all individuals. Data were analysed between lower and upper tertiles of BMI and SBP, separately for each sex. 

Results: In normal-weight individuals, cardiac output (CO) was elevated in those with higher SBP, independently of body size. Moreover, higher CO was associated with an increased stroke volume in men (P < 0.001), but an increased heart rate in women (P = 0.002). In contrast, in overweight individuals, peripheral vascular resistance (PVR) was elevated in men with higher SBP (P = 0.02) and those with lower SBP had the lowest PVR of all groups. In linear regression analyses, there was a stronger association between SBP and CO in normal-weight individuals, but a stronger association between SBP and PVR in overweight individuals. 

Conclusion: Different haemodynamic mechanisms are associated with elevated SBP in young adults, depending on body size and sex. These data suggest the need for differential approaches to the identification and management of young adults with elevated BP.

Original languageEnglish
Pages (from-to)290-297
Number of pages8
JournalJournal of Hypertension
Volume34
Issue number2
DOIs
Publication statusPublished - 1 Feb 2016
Externally publishedYes

Bibliographical note

Copyright the Publisher 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • adiposity
  • BMI
  • cardiac output
  • peripheral vascular resistance
  • SBP

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