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Published on: February 2, 2021

Significance of acute versus chronic troponin T elevation in dialysis patients

Eric H Y Ie1, Peter J Klootwijk, Willem Weimar

  • 1Department of Medicine, Erasmus MC, Rotterdam, The Netherlands. e.ie@erasmusmc.nl

Nephron. Clinical Practice
|November 6, 2004
PubMed

Insights

Elevated cardiac troponin T (cTnT) in asymptomatic hemodialysis patients predicts mortality. This elevation is not due to dialysis but may indicate chronic damage, while a rise during symptoms diagnoses acute coronary syndrome.

Area of Science:

  • Cardiology
  • Nephrology
  • Biomarkers

Background:

  • Cardiac troponin T (cTnT) is frequently elevated in hemodialysis (HD) patients without acute coronary syndrome (ACS).
  • The prognostic significance of pre-dialysis cTnT in asymptomatic HD patients requires clarification.
  • Understanding cTnT dynamics during ACS in this population is crucial.

Purpose of the Study:

  • To evaluate the predictive value of pre-dialysis cTnT for mortality in asymptomatic HD patients.
  • To assess the diagnostic utility of cTnT changes during symptomatic events, particularly ACS.
  • To differentiate causes of elevated cTnT in HD patients.

Main Methods:

  • A cohort of 49 asymptomatic HD patients (30 cardiovascular disease positive, 19 negative) was studied over 2 years.
  • Serial cTnT, myoglobin, and creatine kinase (CK) measurements were performed before, during, and after HD in a subset.
  • cTnT levels were monitored during symptomatic episodes to diagnose ACS.

Main Results:

  • Elevated cTnT (> or =0.03 mug/l) was observed in 82% of patients, more common in those with cardiovascular disease history.
  • No significant changes in cTnT, myoglobin, or CK occurred during the HD procedure.
  • Elevated pre-dialysis cTnT was associated with significantly higher 2-year mortality (33% vs. 0%; p=0.02).

Conclusions:

  • Elevated cTnT in asymptomatic HD patients likely reflects chronic myocardial damage and/or reduced clearance, not acute injury or HD effects.
  • Pre-dialysis cTnT is a valuable prognostic marker for mortality in this cohort.
  • A rise in cTnT above an individual's baseline is diagnostic for acute myocardial injury during ACS events.
Abstract

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