Format

Send to

Choose Destination
Eur Heart J. 2014 Sep 7;35(34):2312-21. doi: 10.1093/eurheartj/ehu189. Epub 2014 May 14.

High-sensitivity troponin I concentrations are a marker of an advanced hypertrophic response and adverse outcomes in patients with aortic stenosis.

Author information

1
BHF/Centre for Cardiovascular Science, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB, UK National Heart Center Singapore, Singapore cchin03m@gmail.com.
2
BHF/Centre for Cardiovascular Science, University of Edinburgh, 49 Little France Crescent, Edinburgh EH16 4SB, UK.
3
Centre of Population Health Sciences, University of Edinburgh, UK.
4
Division of Cardiovascular and Diabetes Medicine, Ninewells Hospital and Medical School, UK.
5
Department of Clinical Biochemistry, Royal Infirmary of Edinburgh, UK.

Abstract

AIMS:

High-sensitivity cardiac troponin I (cTnI) assays hold promise in detecting the transition from hypertrophy to heart failure in aortic stenosis. We sought to investigate the mechanism for troponin release in patients with aortic stenosis and whether plasma cTnI concentrations are associated with long-term outcome.

METHODS AND RESULTS:

Plasma cTnI concentrations were measured in two patient cohorts using a high-sensitivity assay. First, in the Mechanism Cohort, 122 patients with aortic stenosis (median age 71, 67% male, aortic valve area 1.0 ± 0.4 cm(2)) underwent cardiovascular magnetic resonance and echocardiography to assess left ventricular (LV) myocardial mass, function, and fibrosis. The indexed LV mass and measures of replacement fibrosis (late gadolinium enhancement) were associated with cTnI concentrations independent of age, sex, coronary artery disease, aortic stenosis severity, and diastolic function. In the separate Outcome Cohort, 131 patients originally recruited into the Scottish Aortic Stenosis and Lipid Lowering Trial, Impact of REgression (SALTIRE) study, had long-term follow-up for the occurrence of aortic valve replacement (AVR) and cardiovascular deaths. Over a median follow-up of 10.6 years (1178 patient-years), 24 patients died from a cardiovascular cause and 60 patients had an AVR. Plasma cTnI concentrations were associated with AVR or cardiovascular death HR 1.77 (95% CI, 1.22 to 2.55) independent of age, sex, systolic ejection fraction, and aortic stenosis severity.

CONCLUSIONS:

In patients with aortic stenosis, plasma cTnI concentration is associated with advanced hypertrophy and replacement myocardial fibrosis as well as AVR or cardiovascular death.

KEYWORDS:

Aortic stenosis; Cardiac magnetic resonance; High-sensitivity troponin; Left ventricular hypertrophy; Myocardial fibrosis

PMID:
24829362
PMCID:
PMC4156973
DOI:
10.1093/eurheartj/ehu189
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for PubMed Central
Loading ...
Support Center