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Am J Clin Pathol. 2014 Apr;141(4):488-93. doi: 10.1309/AJCPLVQQY35XTFVN.

Measurement of high-sensitivity troponin T in noncardiac medical intensive care unit patients. Correlation to mortality and length of stay.

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1
Bigelow Building, Room 504, 55 Fruit St, Boston, MA 02114; klewandrowski@partners.org.

Abstract

OBJECTIVES:

To assess the frequency, magnitude, and prognostic significance of elevations in cardiac troponin T in noncardiac critically ill patients, including elevations at levels below the limit of detection of traditional assays.

METHODS:

Using a high-sensitivity assay, we measured troponin T (high-sensitivity troponin T [hsTnT]) in 451 unique patients within 12 hours of their admission to a noncardiac medical intensive care unit. Outcomes of patients, grouped by hsTnT level, were compared.

RESULTS:

Overall, 98% of the study patients had detectable levels of hsTnT (>3 ng/L), and 33% had levels above the diagnostic cutoff of a traditional fourth-generation cardiac troponin T assay. Patient groups with higher hsTnT levels had markedly higher rates of in-hospital mortality (P < .001) and longer stays in the hospital and intensive care unit (P < .01).

CONCLUSIONS:

In noncardiac critically ill patients, cardiac troponin T elevations are common but often at levels undetectable by traditional assays. hsTnT elevations predict a more complex clinical course and an increased risk of death.

KEYWORDS:

Medical intensive care unit; Troponin; hsTnT

PMID:
24619748
DOI:
10.1309/AJCPLVQQY35XTFVN
[Indexed for MEDLINE]
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