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Measuring the Carotid to Femoral Pulse Wave Velocity (Cf-PWV) to Evaluate Arterial Stiffness
Published on: May 3, 2018
Carotid artery plaque burden, stiffness, and mortality risk in elderly men: a prospective, population-based cohort
Stefan Störk1, Annewieke W van den Beld, Clemens von Schacky
1Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.
Insights
In elderly men, the number of carotid plaques strongly predicts all-cause and cardiovascular mortality. Carotid artery stiffness measurements did not consistently add prognostic value for mortality risk in this population.
Area of Science:
- Cardiovascular epidemiology
- Geriatric medicine
- Vascular imaging
Background:
- Carotid atherosclerosis indicators may enhance cardiovascular risk assessment.
- Evaluating carotid artery morphology (plaque burden) and function (stiffness) as mortality predictors in elderly men.
Purpose of the Study:
- To prospectively evaluate carotid artery plaque burden and stiffness as predictors of all-cause and cardiovascular mortality in elderly men.
Main Methods:
- Prospective study of 367 independently living elderly men (mean age 78 years).
- Carotid plaque number assessed by B-mode ultrasound; arterial stiffness quantified using a wall tracker system.
- Follow-up for 48 months, recording all-cause and cardiovascular deaths.
Main Results:
- The number of carotid plaques was the strongest predictor of prognosis.
- Increased plaque number independently predicted all-cause mortality (HR 1.35) and cardiovascular mortality (HR 1.18).
- Young's elastic modulus predicted cardiovascular mortality (HR 1.68), but plaque number provided consistent additive prognostic value, unlike stiffness indexes.
Conclusions:
- Carotid artery plaque burden is a significant independent predictor of mortality in elderly men.
- Carotid artery stiffness measurements have limited additional prognostic value for mortality risk in this age group.
Background:
Indicators of carotid atherosclerosis may confer additional prognostic value and guide clinicians in cardiovascular risk assessment. Carotid artery morphology (plaque burden) and function (stiffness indexes) as predictors of all-cause and cardiovascular mortality were prospectively evaluated in elderly men.
Methods And Results:
Cardiovascular risk profile was measured in 367 independently living men (mean+/- SD age, 78+/-4 years). The number of carotid plaques was assessed by B-mode ultrasound, and arterial stiffness was quantified with a wall tracker system. During 48 months of follow-up, 70 deaths (28 cardiovascular) occurred. The total number of carotid plaques was the parameter most closely related to prognosis. In the age-adjusted multivariate Cox model, all-cause mortality was predicted by number of plaques (hazard ratio [HR] per 1-unit increase, 1.35; 95% confidence interval [CI], 1.12 to 1.64). Predictors of cardiovascular mortality in the respective model were number of plaques (HR, 1.18; 95% CI, 1.04 to 1.33) and Young's elastic modulus (HR, 1.68; 95% CI, 1.26 to 2.26). Number of plaques improved the prognostic utility in any prognosis model when added to commonly available cardiovascular risk information. In contrast, stiffness indexes offered no consistent additive value.
Conclusions:
In elderly men, carotid artery plaque burden is a strong independent predictor of all-cause and cardiovascular mortality in the years to come. The additional value of carotid artery stiffness measurements as a pathophysiologically related entity appears to be limited in this age group and, if anything, confined to cardiovascular mortality risk.
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