Article Text

PDF
Differing effect of modifiable cardiovascular risk factors on intima-media thickening and plaque formation at different sites of the arterial vasculature
  1. Sanjay Chaubey1,
  2. Dorothea Nitsch2,
  3. Daniel Altmann2,
  4. Shah Ebrahim2
  1. 1Department of Cardiology, The James Black Centre, Kings College London, London, UK
  2. 2Department of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
  1. Correspondence to Mr Sanjay Chaubey, Department of Cardiology, The James Black Centre, Kings College London, 125 Coldharbour Lane, London SE5 9NU, UK; sanjaychaubey110674{at}gmail.com

Abstract

Objective The effects of cardiovascular risk factors on the vascular anatomy at differing sites of the arterial vasculature have not been well described. The aim of this study was to compare the effect of cardiovascular risk factors on the intima media thickness (IMT) of the wall of the right and left common carotid artery (CCA) at their bifurcation and proximal from their bifurcation, and the effects on the presence of plaque at carotid and femoral arteries.

Design Cross-sectional population-based study.

Setting/participants Random samples of men (n=425) and women (n=367) aged 56–77 years were recruited from two general practices participating in the British Regional Heart Study.

Main outcome measures Ultrasound examination ascertained IMT and the presence of atheromatous plaque. A model for correlated outcomes was used to simultaneously model all risk factor on all measured vascular sites.

Results All cardiovascular risk factors (HbA1c, waist-to-hip ratio, hypertension, LDL and smoking) showed a larger association with IMT thickening at the wall of the CCA at its bifurcation than proximal to its bifurcation. The IMT was greater on the left wall of the CCA than on the right. The association between hypertension with the wall of the CCA depended on age. Smoking was the only risk factor that demonstrated an increased odds (45%, 95% CI 14% to 65%) of the presence of plaque at the femoral arteries when compared with the CCA.

Conclusions The associations of cardiovascular risk factors with the vascular anatomy are not uniform for IMT thickening or the presence of plaque. These differences in local arterial anatomy may result in differences between trial outcomes that investigate surrogate endpoints such as IMT.

  • Atherosclerosis
  • IMT
  • multivariate
  • risk
  • cardiovascular
  • risk stratification

Statistics from Altmetric.com

Footnotes

  • Funding Stroke Association.

  • Competing interests None.

  • Ethics approval This study was conducted with the approval of the university.

  • Provenance and peer review Not commissioned; externally peer reviewed.

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.