Minor elevations in troponin I are associated with mortality and adverse cardiac events in patients with atrial fibrillation.

Abstract:

AIMS:In patients with atrial fibrillation, minor troponin I elevation is regularly detected; however, the prognostic significance of this finding is unknown. We therefore sought to examine the prognostic value of elevated troponin I in patients with atrial fibrillation. METHODS AND RESULTS:A prospective study was conducted analysing all consecutive patients admitted with atrial fibrillation in a 2-year period. Patients with an ST-elevation myocardial infarction (MI) were excluded. Minor troponin elevation was defined as a troponin I level between 0.15 and 0.65 ng/mL, which is still below the 99th percentile of the upper reference limit. A positive troponin I was defined as ≥ 0.65 ng/mL. Study outcomes were all-cause mortality (death), death and myocardial infarction (death/MI), or all major adverse cardiac events (MACE: death, MI, or revascularization). A total of 407 patients were eligible for inclusion. The median duration of follow-up was 688 days. A minor elevation occurred in 81 (20%) patients and 77 (19%) had a positive troponin I. In a multivariate model, minor troponin I elevation and a positive troponin I were independently associated with death [hazard ratio (HR): 2.36, 95% confidence interval (CI): 1.17-4.73 for minor elevation and HR: 3.77, 95% CI: 1.42-10.02 for positive troponin I]. Also, there was an independent correlation between the combined endpoints of death/MI and MACE and both a minor elevation and a positive troponin I. CONCLUSION:Minor elevations in troponin I on hospital admission are associated with mortality and cardiac events in patients with atrial fibrillation and might be useful for risk stratification.

journal_name

Eur Heart J

journal_title

European heart journal

authors

van den Bos EJ,Constantinescu AA,van Domburg RT,Akin S,Jordaens LJ,Kofflard MJ

doi

10.1093/eurheartj/ehq491

subject

Has Abstract

pub_date

2011-03-01 00:00:00

pages

611-7

issue

5

eissn

0195-668X

issn

1522-9645

pii

ehq491

journal_volume

32

pub_type

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