Impact of central obesity on the estimation of carotid-femoral pulse wave velocity

Marco Canepa, Majd AlGhatrif, Gabriele Pestelli, Rohan Kankaria, Sokratis Makrogiannis, James B. Strait, Claudio Brunelli, Edward G. Lakatta, Luigi Ferrucci

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

BACKGROUND: Studies have found that central obesity is associated with higher carotid-femoral pulse wave velocity (PWV). However, traveled distance (TD) measured over the body surface can be substantially overestimated with wider waist circumference (WC). We sought to investigate whether central obesity biases the estimation of PWV and whether this bias explains the association between PWV and different measures of adiposity. METHODS: Seven hundred eleven participants (49.5% men) from the Baltimore Longitudinal Study of Aging with PWV, anthropometrics, and quantification of different fat depots by computed tomography and dual x-ray absorptiometry were included. TD and relative PWV were estimated with a tape measure over the body surface or linear distances taken from radiological images, unaffected by obesity. RESULTS: A significant association was found between wider WC and a greater difference between the 2 TD measurements and their respective PWV in both sexes (r ≥ 0.34; P < 0.001). This overestimation bias appeared to be generally higher in women than men (0.27 m/sec for each unit increase in WC; P < 0.0001). When TD estimated over the body surface was used to calculate PWV, greater WC, total body fat, subcutaneous fat, and visceral fat were all associated with higher PWV (P < 0.05 for all). However, when PWV was calculated using TD estimated from radiological images or body height, only the association with visceral fat held significant. CONCLUSIONS: When TD is measured over the body surface, the role of obesity on PWV is substantially overestimated. After accounting for this bias, PWV was still independently associated with visceral fat but not with other measures of adiposity, confirming its contribution to arterial stiffening.

Original languageEnglish (US)
Pages (from-to)1209-1217
Number of pages9
JournalAmerican Journal of Hypertension
Volume27
Issue number9
DOIs
StatePublished - Sep 2014

Keywords

  • Arterial stiffness
  • Blood pressure
  • Hypertension
  • Obesity
  • Pulse wave velocity
  • Travel distance
  • Visceral fat
  • Waist circumference

ASJC Scopus subject areas

  • Internal Medicine

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