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Eur Heart J. 2016 Nov 21;37(44):3324-3332. doi: 10.1093/eurheartj/ehw232. Epub 2016 Jun 29.

Impact of high-sensitivity cardiac troponin on use of coronary angiography, cardiac stress testing, and time to discharge in suspected acute myocardial infarction.

Author information

1
Department of Cardiology, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland.
2
Cardiovascular Research Institute Basel (CRIB), University Hospital Basel, Basel, Switzerland.
3
Servicio de Urgencias y Medicina Interna - Hospital del Mar, Barcelona, Spain.
4
Laboratory Medicine, University Hospital Basel, Basel, Switzerland.
5
Emergency Department, Kantonsspital Luzern, Luzern, Switzerland.
6
Department of Cardiology, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland chmueller@uhbs.ch.

Abstract

AIMS:

High-sensitivity cardiac troponin (hs-cTn) assays provide higher diagnostic accuracy for acute myocardial infarction (AMI) when compared with conventional assays, but may result in increased use of unnecessary coronary angiographies due to their increased detection of cardiomyocyte injury in conditions other than AMI.

METHODS AND RESULTS:

We evaluated the impact of the clinical introduction of high-sensitivity cardiac troponin T (hs-cTnT) on the use of coronary angiography, stress testing, and time to discharge in 2544 patients presenting with symptoms suggestive of AMI to the emergency department (ED) within a multicentre study either before (1455 patients) or after (1089 patients) hs-cTnT introduction. Acute myocardial infarction was more often the clinical discharge diagnosis after hs-cTnT introduction (10 vs. 14%, P < 0.001), while unstable angina less often the clinical discharge diagnosis (14 vs. 9%, P = 0.007). The rate of coronary angiography was similar before and after the introduction of hs-cTnT (23 vs. 23%, P = 0.092), as was the percentage of coronary angiographies showing no stenosis (11 vs. 7%, P = 0.361). In contrast, the use of stress testing was substantially reduced from 29 to 19% (P < 0.001). In outpatients, median time to discharge from the ED decreased by 79 min (P < 0.001). Mean total costs decreased by 20% in outpatients after the introduction of hs-cTnT (P = 0.002).

CONCLUSION:

The clinical introduction of hs-cTn does not lead to an increased or inappropriate use of coronary angiography. Introduction of hs-cTn is associated with an improved rule-out process and thereby reduces the need for stress testing and time to discharge.

CLINICAL TRIAL REGISTRATION INFORMATION:

www.clinicaltrials.gov. Identifier, NCT00470587.

KEYWORDS:

Angiography; Coronary artery disease; High-sensitivity cardiac troponin; Myocardial infarction; Stress testing

Comment in

PMID:
27357358
PMCID:
PMC5177796
DOI:
10.1093/eurheartj/ehw232
[Indexed for MEDLINE]
Free PMC Article

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