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Cardiac biomarkers are influenced by dialysis characteristics

C Sommerer1, S Heckele, V Schwenger

  • 1Department of Nephrology, University Department of Cardiology, University Hospital of Heidelberg, Germany. Claudia.Sommerer@med.uni-heidelberg.de

Clinical Nephrology
|January 11, 2008
PubMed

Insights

Hemodialysis patients show elevated cardiac biomarkers, cardiac Troponin T (cTNT) and NT-proBNP. High-flux dialyzers maintain stable levels, while low-flux dialyzers increase them, impacting cardiovascular risk assessment.

Area of Science:

  • Nephrology
  • Cardiology
  • Biomarker Research

Background:

  • Cardiac biomarkers cardiac Troponin T (cTNT) and NT-proBNP are frequently elevated in hemodialysis patients.
  • Elevated biomarker levels correlate with increased cardiovascular morbidity and mortality in this population.
  • The influence of the hemodialysis procedure itself on these cardiac biomarkers requires investigation.

Purpose of the Study:

  • To investigate the impact of the hemodialysis procedure on cardiac biomarkers cTNT and NT-proBNP.
  • To compare the effects of high-flux versus low-flux dialyzers on biomarker levels.
  • To assess the prognostic value of these biomarkers in hemodialysis patients.

Main Methods:

  • Measured cTNT and NT-proBNP levels in 49 chronic hemodialysis patients before and after sessions.
  • Utilized standard hemodialysis with polysulfone dialyzers (high-flux and low-flux).
  • Assessed cardiovascular events and mortality over a 42-month follow-up period.

Main Results:

  • cTNT and NT-proBNP levels increased significantly post-hemodialysis with low-flux dialyzers but remained unchanged with high-flux dialyzers.
  • Oligoanuric patients and those with non-native fistulas exhibited higher baseline biomarker levels.
  • Higher baseline cTNT and NT-proBNP levels were associated with cardiovascular events.

Conclusions:

  • Hemodialysis modalities, specifically dialyzer type, significantly influence cTNT and NT-proBNP levels.
  • Elevations post-hemodialysis with low-flux dialyzers are partly due to hemoconcentration.
  • cTNT and NT-proBNP are valuable prognostic indicators for cardiovascular events and mortality in hemodialysis patients.
Abstract

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