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Elevated troponin T concentrations in critically ill patients.

Jacqueline M T Klein Gunnewiek1, Joris J J P M van de Leur2

  • 1Department of Clinical Chemistry, Canisius-Wilhelmina Hospital, P.O. Box 9015, 6500 GS, Nijmegen, The Netherlands. j.kleingunnewiek@akc.umcn.nl.

Intensive Care Medicine
|October 8, 2003
PubMed
Summary

Elevated troponin T levels were common in critically ill patients, often indicating underlying coronary artery disease (CAD) rather than acute myocardial infarction. This suggests frequent, unrecognized minor heart damage in this population.

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Area of Science:

  • Cardiology
  • Critical Care Medicine
  • Biomarkers

Background:

  • Troponin T is a key biomarker for myocardial injury.
  • Critically ill patients often have complex medical conditions.
  • Assessing cardiac damage in this population is clinically important.

Purpose of the Study:

  • Determine troponin T elevation incidence in critically ill patients.
  • Correlate troponin T levels with electrocardiograph findings.
  • Compare clinical parameters between troponin T-positive and negative patients.

Main Methods:

  • Prospective study in a mixed ICU.
  • Included 34 mechanically ventilated or post-surgery patients.
  • Collected blood for troponin T measurement and performed ECGs when levels were high.

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Main Results:

  • 32% of patients had elevated troponin T, often on admission.
  • Troponin T-positive patients more frequently underwent acute surgery and experienced hypotension.
  • Only 4/11 troponin T-positive patients had ECG-confirmed myocardial infarction; all had coronary artery disease (CAD).

Conclusions:

  • High incidence of troponin T elevations observed in critically ill patients.
  • Elevations frequently indicate underlying, potentially unrecognized, minor myocardial damage in patients with CAD.
  • ECG alone may underestimate myocardial injury in this cohort.