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Am Heart J. 2000 Dec;140(6):917-27.

Elevated cardiac troponin levels predict the risk of adverse outcome in patients with acute coronary syndromes.

Author information

1
M.Z. Sacco Heart Foundation; the Cardiology Division, Bentivoglio Hospital, Bentivoglio, Forlì, Italy. ottanif@amf.dsnet.it

Abstract

BACKGROUND:

Elevations of cardiac troponin T or I are predictive of adverse outcomes in patients with acute coronary syndromes. However, odds ratios (ORs) vary substantially between studies. This investigation refines these values by means of a meta-analysis.

METHODS:

Twenty-one studies were suitable. ORs were calculated for short-term (30 days) and long-term (5 months to 3 years) follow-up in patients with ST-segment elevation (ST upward arrow), in those without ST-segment elevation (no ST upward arrow), and in patients with unstable angina. The primary end point was a composite of death or nonfatal myocardial infarction.

RESULTS:

A total of 18,982 patients were included. At 30 days, the OR for death or myocardial infarction was 3.44 (95% confidence interval [CI], 2.94-4.03; P <. 00001) for patients with positive troponin. In the ST upward arrow group, troponin elevations carried a 2.86-fold (95% CI, 2.35-3.47; P <.0001) higher risk during short-term follow-up, which was maintained long term. The no-ST upward arrow patients with troponin elevations manifested a 4.93-fold (95% CI, 3.77-6.45; P <.0001) increase of adverse outcomes. The OR for patients with unstable angina and positive troponin was 9.39 (95% CI, 6.46-13.67; P <.0001). For cardiac death alone, the results were similar.

CONCLUSIONS:

Patients with acute coronary syndromes who have troponin elevations show a substantial increase in risk during short and long-term follow-up.

PMID:
11099996
DOI:
10.1067/mhj.2000.111107
[Indexed for MEDLINE]

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