4.7 Article

Implementation of High-Sensitivity Cardiac Troponin Assays in the United States

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ELSEVIER SCIENCE INC
DOI: 10.1016/j.jacc.2022.10.017

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chest pain; high-sensitivity cardiac troponin assays; implementation

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This study found that the implementation of high-sensitivity cardiac troponin assays in US hospitals is increasing, but the majority of hospitals still use less sensitive assays. The use of high-sensitivity cardiac troponin assays was associated with increased use of echocardiography for NSTE-ACS patients and reduced use of invasive coronary angiography for low-risk chest pain patients.
BACKGROUND Few data exist regarding the implementation of high-sensitivity cardiac troponin (hs-cTn) assays in the United States since their approval.OBJECTIVES This study sought to explore trends in hs-cTn assay implementation over time and assess the association of their use with in-hospital cardiac testing and outcomes.METHODS The study examined trends in implementation of hs-cTn assays among participating hospitals in the National Cardiovascular Data Registry Chest Pain-MI [Myocardial Infarction] Registry from January 1, 2019 through September 30, 2021. Associations among hs-cTn use, use of in-hospital diagnostic imaging, and patient outcomes were assessed using generalized estimating equation models with logistic or gamma distributions.RESULTS Among 550 participating hospitals (N 1/4 251,000), implementation of hs-cTn assays increased from 3.3% in the first quarter of 2019 to 32.6% in the third quarter of 2021 (Ptrend < 0.001). Use of hs-cTn was associated with more echocardiography among persons with non-ST-segment elevation acute coronary syndrome (NSTE-ACS; 82.4% vs 75.0%; adjusted odds ratio: 1.43; 95% CI: 1.19-1.73) but not among low-risk chest pain individuals. Use of hs-cTn was associated with less invasive coronary angiography among low-risk patients (3.7% vs 4.5%; adjusted odds ratio: 0.73; 95% CI: 0.58-0.92) but similar use for patients with NSTE-ACS. There was no association between hs-cTn use and noninvasive stress testing or coronary computed tomography angiography testing. Among individuals with NSTE-ACS, hs-cTn use was not associated with revascularization or in-hospital mortality. Use of hs-cTn was associated with a shorter length of stay (median 47.6 hours vs 48.0 hours; ratio: 0.94; 95% CI: 0.90-0.98).CONCLUSIONS Implementation of hs-cTn among U.S. hospitals is increasing, but most U.S. hospitals continue to use less sensitive assays. The use of hs-cTn was associated with modestly shorter length of stay, greater use of echocardi-ography for NSTE-ACS, and less use of invasive angiography among low-risk patients.(J Am Coll Cardiol 2023;81:207-219) (c) 2023 by the American College of Cardiology Foundation.

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