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Aortic Aging in ESRD: Structural, Hemodynamic, and Mortality Implications.

Gérard M London1, Michel E Safar2, Bruno Pannier3

  • 1Institut National de la Santé et de la Recherche Médicale U970, Hôpital Européen Georges-Pompidou, Paris, France; Department of Nephrology, Hopital Manhes, Fleury-Merogis, France; glondon@club-internet.fr.

Journal of the American Society of Nephrology : JASN
|October 18, 2015
PubMed
Summary
This summary is machine-generated.

Aging accelerates aortic stiffening and dilation, particularly in hemodialysis patients. Aortic geometry, not just stiffness, significantly predicts mortality risk in these individuals.

Keywords:
arteriescardiovascular diseasechronic kidney failuremortalitypulse wave velocityvascular calcification

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Area of Science:

  • Cardiovascular Physiology
  • Vascular Aging
  • Nephrology

Background:

  • Aging leads to aortic stiffening and dilation, creating pressure wave gradients.
  • End-stage renal disease (ESRD) is associated with premature arterial aging.

Purpose of the Study:

  • To determine the independent roles of aortic stiffness and geometry in mortality risk among hemodialysis patients.
  • To compare arterial aging patterns in controls versus hemodialysis patients.

Main Methods:

  • Measured aortic pulse wave velocity (PWV) and brachial PWV for stiffness gradient.
  • Assessed aortic taper using ascending aortic and bifurcation diameters.
  • Utilized Cox proportional hazard models to analyze mortality risk.

Main Results:

  • Hemodialysis patients showed a greater age-associated increase in aortic PWV compared to controls.
  • In hemodialysis patients, decreased aortic taper correlated with abdominal aortic calcifications and lower global reflection coefficient.
  • Age, aortic PWV, and aortic bifurcation diameter were significant predictors of all-cause and cardiovascular mortality.

Conclusions:

  • Aortic stiffness is a predictor of mortality in hemodialysis patients.
  • Aortic geometry, specifically aortic taper, is also crucial for evaluating mortality risk in this population.
  • Evaluating both aortic stiffness and geometry is important for risk stratification in hemodialysis patients.