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Am Heart J. 2011 Jun;161(6):1031-7. doi: 10.1016/j.ahj.2010.09.021. Epub 2011 May 11.

Prognostic value of cardiac troponin T in patients with moderate to severe heart failure scheduled for cardiac resynchronization therapy.

Author information

1
University of Oslo, Faculty of Medicine, Department of Cardiology, Oslo University Hospital, Oslo, Norway. marit.aarones@oslo-universitetssykehus.no

Abstract

BACKGROUND:

Predicting response to cardiac resynchronization therapy (CRT) is challenging. Highly sensitive cardiac troponin T (hsTnT) might predict response to CRT and identify patients at a high risk of experiencing severe cardiovascular events. We investigated whether baseline levels of hsTnT were associated with response to CRT and with severe cardiovascular events after long-term follow-up.

METHODS:

Eighty-one consecutive patients were included according to the current guidelines for CRT. Biochemical, functional, and clinical parameters were assessed at baseline and at 3, 6, and 12 months of follow-up; and mortality/cardiac transplantation after 46 ± 6 months of follow-up was investigated. Cardiac magnetic resonance imaging and echocardiography were used to assess left ventricular function including viability and remodeling.

RESULTS:

Seventy-five patients completed 12 months of follow-up; and after a follow-up of 46 ± 6 months, a total of 15 patients died, 13 of these from cardiovascular causes, and 7 underwent heart transplantation. Baseline hsTnT <15 ng/L predicted response to CRT and was associated with a more favorable outcome with regard to severe cardiovascular events. Multivariate analysis found that presence of transmural scar tissue/fibrosis on magnetic resonance imaging and use of statins were independently associated with higher concentrations of hsTnT at baseline. There was a strong correlation between hsTnT and N-terminal pro-B-type natriuretic peptide levels.

CONCLUSIONS:

Highly sensitive TnT levels were elevated in the majority of heart failure patients who were scheduled for CRT. The HsTnT levels predicted response to CRT as well as long-time survival.

PMID:
21641347
DOI:
10.1016/j.ahj.2010.09.021
[Indexed for MEDLINE]

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