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Steiro OT, Langørgen J, Tjora HL, Bjørneklett RO, Skadberg Ø, Bonarjee VVS, Mjelva ØR, Steinsvik T, Lindahl B, Omland T, Aakre KM, Vikenes K. Prognostic significance of chronic myocardial injury diagnosed by three different cardiac troponin assays in patients admitted with suspected acute coronary syndrome. Clin Chem Lab Med 2024; 62:729-739. [PMID: 37937808 DOI: 10.1515/cclm-2023-0336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 10/17/2023] [Indexed: 11/09/2023]
Abstract
OBJECTIVES Chronic myocardial injury (CMI) is defined as stable concentrations of cardiac troponin T or I (cTnT or cTnI) above the assay-specific 99th percentile upper reference limit (URL) and signals poor outcome. The clinical implications of diagnosing CMI are unclear. We aimed to assess prevalence and association of CMI with long-term prognosis using three different high-sensitivity cTn (hs-cTn) assays. METHODS A total of 1,292 hospitalized patients without acute myocardial injury had cTn concentrations quantified by hs-cTn assays by Roche Diagnostics, Abbott Diagnostics and Siemens Healthineers. The median follow-up time was 4.1 years. The prevalence of CMI and hazard ratios for mortality and cardiovascular (CV) events were calculated based on the URL provided by the manufacturers and compared to the prognostic accuracy when lower percentiles of cTn (97.5, 95 or 90), limit of detection or the estimated bioequivalent concentrations between assays were used as cutoff values. RESULTS There was no major difference in prognostic accuracy between cTnT and cTnI analyzed as continuous variables. The correlation between cTnT and cTnI was high (r=0.724-0.785), but the cTnT assay diagnosed 3.9-4.5 times more patients with having CMI based on the sex-specific URLs (TnT, n=207; TnI Abbott, n=46, TnI Siemens, n=53) and had higher clinical sensitivity and AUC at the URL. CONCLUSIONS The prevalence of CMI is highly assay-dependent. cTnT and cTnI have similar prognostic accuracy for mortality or CV events when measured as continuous variables. However, a CMI diagnosis according to cTnT has higher prognostic accuracy compared to a CMI diagnosis according to cTnI.
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Affiliation(s)
- Ole-Thomas Steiro
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Jørund Langørgen
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
| | - Hilde L Tjora
- Emergency Care Clinic, Haukeland University Hospital, Bergen, Norway
| | - Rune O Bjørneklett
- Emergency Care Clinic, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Øyvind Skadberg
- Laboratory of Medical Biochemistry, Stavanger University Hospital, Stavanger, Norway
| | | | - Øistein R Mjelva
- Department of Internal Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Trude Steinsvik
- Department of Laboratory Medicine, Vestre Viken Hospital Trust, Bærum, Norway
| | - Bertil Lindahl
- Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden
- Uppsala Clinical Research Center, Uppsala, Sweden
| | - Torbjørn Omland
- Center for Heart Failure Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Cardiology, Akershus University Hospital, Oslo, Norway
| | - Kristin M Aakre
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
| | - Kjell Vikenes
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Bergen, Norway
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Zhang L, Zhu J, Zhang S, Fu H. Investigating outlier rates of cardiac troponin I and troponin T assays: A systematic review. Heliyon 2024; 10:e23788. [PMID: 38205298 PMCID: PMC10776999 DOI: 10.1016/j.heliyon.2023.e23788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 01/12/2024] Open
Abstract
Objectives This review aimed to harmoniously summarize and compare outlier rates for various cardiac troponin (cTn) assays, including high-sensitivity-cTn (hs-cTn) assays and contemporary cTn (generation of assays prior to hs-cTn ones) assays, from the published studies. Methods The PRISMA guidelines were utilized to perform this systematic review. Five databases, including PubMed, Scopus, Embase, Cochrane Library, and Web of Science, were searched using specific keywords up to June 30th, 2023. Studies reporting specifically calculated outlier rates for cTn assays when conducting in-vitro diagnosis in human samples were included. Selected studies were then further assessed using the GRADE tool. Results Thirteen studies were included. The data from the studies were summarized statistically in this review. The results showed substantial evidence of improved analytical robustness or reduced respective mean rates of outliers, critical outliers, and analytical outliers for hs-cTn assays (0.14 %, 0.18 %, and 0.18 %) compared to contemporary cTn assays (0.63 %, 0.71 %, and 0.50 %). Conclusion The findings offer promisingly provide a comprehensive reference for laboratory scientists and clinical staff in choosing the most suitable cTn assay for patient care regrading outlier rates. Besides, this review reveals the advancements of hs-cTn assays with lower outlier rates than contemporary cTn assays. The emerging challenges for continuously improving analytical robustness of cTn assays are also elaborated.
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Affiliation(s)
- Litao Zhang
- Clinical Laboratory, Wuhan Asia General Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei 430000, China
| | - Jia Zhu
- School of Intelligent Manufacturing and Smart Transportation, Suzhou City University, Suzhou, Jiangsu 215000, China
- School of Advanced Technology, Xi'an Jiaotong-Liverpool University, Suzhou, Jiangsu 215000, China
| | - Shiqiang Zhang
- School of Intelligent Manufacturing and Smart Transportation, Suzhou City University, Suzhou, Jiangsu 215000, China
| | - Hao Fu
- Mindray Medical International Ltd., Shenzhen, Guangdong 518000, China
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3
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Atar D, Rosseland LA, Jammer I, Aakre KM, Wiseth R, Molund M, Gualandro DM, Omland T. Implementing screening for myocardial injury in non-cardiac surgery: perspectives of an ad-hoc interdisciplinary expert group. SCAND CARDIOVASC J 2023; 57:31-39. [PMID: 37141087 DOI: 10.1080/14017431.2022.2112071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Objectives. Perioperative myocardial injury (PMI) is increasingly recognised as an important complication of non-cardiac surgery, with often clinically silent presentation, but detrimental prognosis. Active screening for PMI, involving the detection of dynamic and elevated levels of cardiac troponin, has recently been advocated by an increasing number of guidelines; however, active PMI screening has not been reflected in clinical practice. Design. As consensus on a common screening and management pathway is lacking, we synthesise the current evidence to provide suggestions on the selection of patients for screening, organisation of a screening program, and a potential management pathway, building upon a recently published perioperative screening algorithm. Results. Screening should be performed using high-sensitivity assays both preoperatively and postoperatively (postoperative Days 1 and 2) in patients at high-risk of experiencing perioperative complications. Conclusion. This expert opinion piece by an interdisciplinary group of predominantly Norwegian clinicians aims to assist healthcare professionals planning to implement guideline-recommended PMI screening at a local level in order to improve patient outcomes following non-cardiac surgery.
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Affiliation(s)
- Dan Atar
- Department of Cardiology, Oslo University Hospital Ulleval, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Leiv Arne Rosseland
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Research and Development, Division of Emergencies and Critical Care, Oslo University Hospital, Oslo, Norway
| | - Ib Jammer
- Department of Anaesthesia and Intensive Care, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Kristin Moberg Aakre
- Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
- Department of Heart Disease, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Rune Wiseth
- Clinic of Cardiology, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
- Department of Circulation and Medical Imaging, NTNU, Norwegian University of Science and Technology, Trondheim, Norway
| | - Marius Molund
- Department of Orthopaedic Surgery, Østfold Hospital Trust, Grålum, Norway
| | - Danielle M Gualandro
- Department of Cardiology and Cardiovascular Research Institute Basel (CRIB), University Hospital Basel, University of Basel, Switzerland
| | - Torbjørn Omland
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- Department of Cardiology, Akershus University Hospital, Lørenskog, Norway
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4
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Krintus M, Panteghini M. Judging the clinical suitability of analytical performance of cardiac troponin assays. Clin Chem Lab Med 2023; 61:801-810. [PMID: 36798043 DOI: 10.1515/cclm-2023-0027] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/07/2023] [Indexed: 02/18/2023]
Abstract
New millennium diagnostic criteria for acute myocardial infarction precipitated a revolutionary shift from an approach based primarily on electrocardiography and clinical symptoms to a strategy based on biomarkers, and preferably cardiac troponins (cTn) I and T. In the last 20 years, clinical recommendations have strengthened the role of cTn and led to the development of highly sensitive (hs-cTn) assays, which are now leading players in all current clinical practice guidelines. To optimize the clinical use of these hs-cTn assays, focus on their analytical aspects has become increasingly important, emphasizing the need for the establishment of suitable analytical performance by the definition and implementation of appropriate specifications. An accurate estimate of measurement uncertainty, together with the acquisition of the highest analytical quality when very low concentrations of hs-cTn are measured, are essential requirements and should represent a practical laboratory standard in assuring optimal clinical use. Additional goals for further improving the quality of laboratory information should be the establishment of robust data concerning biological variation of cTn and the resolution of practical challenges opposed to the harmonization of cTn I results obtained by differing commercial measuring systems.
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Affiliation(s)
- Magdalena Krintus
- Department of Laboratory Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Torun, Poland
| | - Mauro Panteghini
- Department of Biomedical and Clinical Sciences, University of Milan, Milano, Italy
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Bürgi JJ, Rösslein M, Nolte O, Wick P, Garcia Boy R, Stranders S, Dollenmaier G, Peier K, Nohynek B, Fischer A, Stolz R, Cettuzzi M, Graf L, Korte W. Mild COVID-19 induces early, quantifiable, persistent troponin I elevations in elder men. Front Cardiovasc Med 2022; 9:1053790. [DOI: 10.3389/fcvm.2022.1053790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/10/2022] [Indexed: 12/04/2022] Open
Abstract
ImportanceElderly patients, especially men, are at risk of increased morbidity from coronavirus disease 2019 (COVID-19). Long-term data on troponin I levels in longitudinal observational studies of outpatients with mild to moderate COVID-19 are scarce.ObjectiveThis controlled cohort study aimed to evaluate the course of troponin I concentrations over a long period in convalescent COVID-19 outpatients with mild to moderate symptoms.Setting and participantsIn this cohort study, individuals with PCR-confirmed, mild to moderate SARS-CoV-2 infection as well as control individuals with confirmed negative PCR and negative SARS-CoV-2 serology were included. Study visits were performed from April 2020 through July 2021 (initialized during the first wave of the corona pandemic in Switzerland). A study visit in patients comprised blood draws every week in the first month and additionally after 8 weeks. This course was repeated in patients observed long-term.ResultsThis study enrolled 278 individuals from the Canton of St. Gallen, Switzerland, aged 12–92 years (59.5% women), who had mild to moderate COVID-19 symptoms (outpatients only) and a diagnosis confirmed by positive RT-PCR. Fifty-four of the participants with confirmed SARS-CoV-2 infection were followed for 14 months with repeat cycles of the testing protocol. In addition, 115 symptomatic patients that were PCR and serology negative were enrolled in the same time period as a control group. In COVID-19 patients, low-level troponin I concentrations (cTnI) were significantly increased from baseline until week 9 after positive RT-PCR diagnosis in men older than 54 years [ΔcTnI = 5.0 ng/L (median); 95% CI 4.1–6.0; p = 0.02]. The troponin I concentration remained elevated throughout 14 months in men older than 54 years within the cohort with a prolonged observation period. This statistically significant change in troponin I concentration was not dependent on co-morbidities in this group. ALT, Creatinine, BNP, and D-Dimer values after convalescence did not differ in comparison to the control cohort.ConclusionIn this analysis of individuals with confirmed SARS-CoV-2 infection, hs troponin I levels of men aged 54 or older significantly increased after infection. They remained elevated for at least 14 months after diagnosis. This suggests the possibility of an ongoing, long-term, low-grade myocardial injury. Further studies with focus on elderly patients and a prolonged observational period are necessary to elucidate whether the phenomenon observed is associated with detectable structural changes to the heart muscle or is without further clinical consequences.
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Affiliation(s)
- James A de Lemos
- From the Cardiology Division, Department of Medicine (J.A.L.), and the Department of Cardiac Surgery (M.J.), University of Texas Southwestern Medical Center, Dallas
| | - Michael Jessen
- From the Cardiology Division, Department of Medicine (J.A.L.), and the Department of Cardiac Surgery (M.J.), University of Texas Southwestern Medical Center, Dallas
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7
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Gärtner C, Langhammer R, Schmidt M, Federbusch M, Wirkner K, Löffler M, Isermann B, Laufs U, Wachter R, Kaiser T. Revisited Upper Reference Limits for Highly Sensitive Cardiac Troponin T in Relation to Age, Sex, and Renal Function. J Clin Med 2021; 10:5508. [PMID: 34884210 PMCID: PMC8658212 DOI: 10.3390/jcm10235508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/15/2021] [Accepted: 11/13/2021] [Indexed: 12/03/2022] Open
Abstract
(1) Background: Highly sensitive cardiac troponin T (hs-cTnT) plays an essential role in the diagnosis of myocardial injury. The upper reference limit of the respective assay is generally applied, irrespective of age, renal function, or sex. We aimed to identify age-adjusted and sex-adjusted upper reference limits in relation to renal function in a large population-based cohort without cardiac diseases. (2) Methods: We included 5428 subjects of the population-based LIFE-Adult cohort, free of diagnosed cardiac diseases. Sex-adjusted and age-adjusted 99th percentiles for hs-cTnT in subjects with preserved renal function were obtained. (3) Results: The hs-cTnT values were higher in men of all age groups. In both sexes, an increasing age positively correlated with higher hs-cTnT values. Hs-cTnT weakly correlated with serum creatinine. The three-dimensional analysis of age, creatinine, and hs-cTnT showed no relevant additional effect of creatinine on hs-cTnT. In men aged above 60 and women above 70, the calculated 99th percentiles clearly exceeded the commonly applied thresholds. (4) Conclusion: Age and sex have a major impact on the serum concentration of hs-cTnT, while renal function does not. We propose to consider age-adjusted and sex-adjusted reference values.
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Affiliation(s)
- Christiane Gärtner
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig Medical Center and Medical Faculty, 04109 Leipzig, Germany; (C.G.); (M.S.); (M.F.); (B.I.)
| | - Romy Langhammer
- Clinic and Polyclinic for Cardiology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (R.L.); (U.L.); (R.W.)
| | - Maria Schmidt
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig Medical Center and Medical Faculty, 04109 Leipzig, Germany; (C.G.); (M.S.); (M.F.); (B.I.)
| | - Martin Federbusch
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig Medical Center and Medical Faculty, 04109 Leipzig, Germany; (C.G.); (M.S.); (M.F.); (B.I.)
| | - Kerstin Wirkner
- LIFE—Leipzig Research Center for Civilization Diseases, University of Leipzig, 04109 Leipzig, Germany; (K.W.); (M.L.)
- Institute for Medical Informatics, Statistics, and Epidemiology (IMISE), University of Leipzig, 04109 Leipzig, Germany
| | - Markus Löffler
- LIFE—Leipzig Research Center for Civilization Diseases, University of Leipzig, 04109 Leipzig, Germany; (K.W.); (M.L.)
- Institute for Medical Informatics, Statistics, and Epidemiology (IMISE), University of Leipzig, 04109 Leipzig, Germany
| | - Berend Isermann
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig Medical Center and Medical Faculty, 04109 Leipzig, Germany; (C.G.); (M.S.); (M.F.); (B.I.)
| | - Ulrich Laufs
- Clinic and Polyclinic for Cardiology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (R.L.); (U.L.); (R.W.)
| | - Rolf Wachter
- Clinic and Polyclinic for Cardiology, University of Leipzig Medical Center, 04103 Leipzig, Germany; (R.L.); (U.L.); (R.W.)
| | - Thorsten Kaiser
- Institute for Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, University of Leipzig Medical Center and Medical Faculty, 04109 Leipzig, Germany; (C.G.); (M.S.); (M.F.); (B.I.)
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8
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Regan B, O'Kennedy R, Collins D. Advances in point-of-care testing for cardiovascular diseases. Adv Clin Chem 2021; 104:1-70. [PMID: 34462053 DOI: 10.1016/bs.acc.2020.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Point-of-care testing (POCT) is a specific format of diagnostic testing that is conducted without accompanying infrastructure or sophisticated instrumentation. Traditionally, such rapid sample-to-answer assays provide inferior analytical performances to their laboratory counterparts when measuring cardiac biomarkers. Hence, their potentially broad applicability is somewhat bound by their inability to detect clinically relevant concentrations of cardiac troponin (cTn) in the early stages of myocardial injury. However, the continuous refinement of biorecognition elements, the optimization of detection techniques, and the fabrication of tailored fluid handling systems to manage the sensing process has stimulated the production of commercial assays that can support accelerated diagnostic pathways. This review will present the latest commercial POC assays and examine their impact on clinical decision-making. The individual elements that constitute POC assays will be explored, with an emphasis on aspects that contribute to economically feasible and highly sensitive assays. Furthermore, the prospect of POCT imparting a greater influence on early interventions for medium to high-risk individuals and the potential to re-shape the paradigm of cardiovascular risk assessments will be discussed.
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Affiliation(s)
- Brian Regan
- School of Biotechnology, Dublin City University, Dublin, Ireland.
| | - Richard O'Kennedy
- School of Biotechnology, Dublin City University, Dublin, Ireland; Research Complex, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - David Collins
- School of Biotechnology, Dublin City University, Dublin, Ireland
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Krintus M, Panteghini M. Laboratory-related issues in the measurement of cardiac troponins with highly sensitive assays. Clin Chem Lab Med 2021; 58:1773-1783. [PMID: 32134723 DOI: 10.1515/cclm-2020-0017] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 01/24/2020] [Indexed: 12/13/2022]
Abstract
A number of assay-related issues can affect the performance of cardiac troponin (cTn) measurement in everyday practice. In this respect, it is vital that all information on cTn assays is known and that the performance characteristics of assays are objectively assessed and adequately described. The advent of the latest generation of more sensitive cTn assays has heralded a new wave of information about low concentrations of cTn in blood. These recent generation assays have improved analytical sensitivity and corresponding performance at low cTn concentrations when compared to their predecessors, providing a convincing goal for laboratory medicine in helping clinicians in the diagnosis of acute myocardial infarction. Crucial to the clinical utility of highly sensitive cTn assays is the laboratorians' role in closely scrutinizing proposed assays and defining their value in relation to available evidence. Analytical, as well as pre-analytical and post-analytical, aspects must be documented. In this review, we describe what laboratory professionals should know about their cTn assay performance characteristics and the pre-analytical prerequisites for robustness to ensure optimal post-analytical reporting.
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Affiliation(s)
- Magdalena Krintus
- Department of Laboratory Medicine, Nicolaus Copernicus University, Collegium Medicum, 9 Sklodowskiej-Curie Street, 85-094 Bydgoszcz, Poland, Phone: +48 52 585 44 90, Fax: +48 52 585 36 03
| | - Mauro Panteghini
- Department of Biomedical and Clinical Sciences 'Luigi Sacco', University of Milan, Milan, Italy
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Puelacher C, Bollen Pinto B, Mills NL, Duceppe E, Popova E, Duma A, Nagele P, Omland T, Hammerer-Lercher A, Lurati Buse G. Expert consensus on peri-operative myocardial injury screening in noncardiac surgery: A literature review. Eur J Anaesthesiol 2021; 38:600-608. [PMID: 33653981 DOI: 10.1097/eja.0000000000001486] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Peri-operative myocardial injury, detected by dynamic and elevated cardiac troponin (cTn) concentrations, is a common complication of noncardiac surgery that is strongly associated with 30-day mortality. Although active screening for peri-operative myocardial injury has been suggested in recent guidelines, clinical implementation remains tentative due to a lack of examples on how to tackle such an interdisciplinary project at a local level. Moreover, consensus on which assay and cTn cut-off values should be used has not yet been reached, and guidance on whom to screen is lacking. In this article, we aim to summarise local examples of successfully implemented cTn screening practices and review the current literature in order to provide information and suggestions for patient selection, organisation of a screening programme, caveats and a potential management pathway.
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Affiliation(s)
- Christian Puelacher
- From the Department of Cardiology and Cardiovascular Research Institute Basel, University Hospital of Basel, University of Basel; Department of Internal Medicine, University Hospital Basel, University Basel, Basel (CP), Division of Anaesthesiology, Department of Anaesthesiology, Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland (CP, BBP), Geneva Perioperative Basic, Translational and Clinical Research Group (BB-P), BHF Centre for Cardiovascular Science and Usher Institute, University of Edinburgh, Edinburgh, UK (NLM), Department of Medicine, Centre Hospitalier de l'Universite de Montreal, Montreal, Quebec, Canada (ED), Iberoamerican Cochrane Centre, Biomedical Research Institute (IIB Sant Pau), Barcelona, Spain (EP), Department of Anaesthesiology and Intensive Care, Medical University of Vienna, Vienna, Austria (AD), Departments of Anesthesia and Critical Care, University of Chicago, Chicago, Illinois, USA (PN), Department of Cardiology, Division of Medicine, Akershus University Hospital and University of Oslo, Oslo, Norway (TO), Institute of Laboratory Medicine, County Hospital Aarau, Aarau, Switzerland (A-HL), Department of Anaesthesiology, University Hospital Düsseldorf, Düsseldorf, Germany (GLB)
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11
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Lam L, Aspin L, Heron RC, Ha L, Kyle C. Discrepancy between Cardiac Troponin Assays Due to Endogenous Antibodies. Clin Chem 2020; 66:445-454. [PMID: 32031592 DOI: 10.1093/clinchem/hvz032] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 10/09/2019] [Indexed: 11/14/2022]
Abstract
BACKGROUND Despite well-described analytical effects of autoantibodies against cardiac troponin (cTn) I on experimental assays, no study has systematically examined their impact on cTn assays in clinical use. We determined the effects of endogenous antibodies on 5 different cTnI assays and a cTnT assay. METHODS cTn was measured by 6 methods: Siemens hs-cTnI Centaur, Siemens hs-cTnI Vista, Abbott hs-cTnI Architect, Beckman hs-cTnI Access, Beckman cTnI Access, and Roche hs-cTnT Elecsys. Measurements were repeated on 5 assays (all except Siemens hs-cTnI Vista) following immunoglobulin depletion by incubation with protein A. Low recovery of cTnI (<40%) following immunoglobulin depletion was considered positive for macro-cTnI. Protein A findings were validated by gel filtration chromatography and polyethylene glycol precipitation. RESULTS In a sample of 223 specimens selected from a community laboratory that uses the Siemens hs-cTnI Centaur assay and from which cTn was requested, 76% of samples demonstrated increased cTnI (median, 88 ng/L; interquartile range, 62-204 ng/L). Macro-cTnI was observed in 123 (55%) of the 223 specimens. Comparisons of cTnI assays markedly improved once patients with macro-cTnI were removed. Passing-Bablok regression analysis between hs-cTnI assays demonstrated different slopes for patients with and without macro-cTnI. In patients with macro-cTnI, 89 (72%) showed no effect on the recovery of cTnT, whereas 34 (28%) had reduced recovery of cTnT. The proportion of results above the manufacturers' 99th percentile varied with the cTn assay and macro-cTnI status. CONCLUSION We suggest that the observed discrepancy between hs-cTnI assays may be attributed in part to the presence of macro-cTnI.
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Affiliation(s)
- Leo Lam
- Department of Chemical Pathology, LabPlus, Auckland City Hospital, Auckland, New Zealand
- Department of Biochemistry, Middlemore Hospital Laboratories, Auckland New Zealand
| | - Lisa Aspin
- Department of Biochemistry, Labtests, Auckland, New Zealand
| | - Robert Campbell Heron
- Department of Chemical Pathology, LabPlus, Auckland City Hospital, Auckland, New Zealand
| | - Leah Ha
- Department of Chemical Pathology, LabPlus, Auckland City Hospital, Auckland, New Zealand
- Department of Biochemistry, Middlemore Hospital Laboratories, Auckland New Zealand
| | - Campbell Kyle
- Department of Chemical Pathology, LabPlus, Auckland City Hospital, Auckland, New Zealand
- Department of Biochemistry, Labtests, Auckland, New Zealand
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12
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Xu W, Wang L, Zhang R, Sun X, Huang L, Su H, Wei X, Chen CC, Lou J, Dai H, Qian K. Diagnosis and prognosis of myocardial infarction on a plasmonic chip. Nat Commun 2020; 11:1654. [PMID: 32245966 PMCID: PMC7125217 DOI: 10.1038/s41467-020-15487-3] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 03/13/2020] [Indexed: 01/06/2023] Open
Abstract
Cardiovascular diseases lead to 31.5% of deaths globally, and particularly myocardial infarction (MI) results in 7.4 million deaths per year. Diagnosis of MI and monitoring for prognostic use are critical for clinical management and biomedical research, which require advanced tools with accuracy and speed. Herein, we developed a plasmonic gold nano-island (pGold) chip assay for diagnosis and monitoring of MI. On-chip microarray analysis of serum biomarkers (e.g., cardiac troponin I) afforded up to 130-fold enhancement of near-infrared fluorescence for ultra-sensitive and quantitative detection within controlled periods, using 10 μL of serum only. The pGold chip assay achieved MI diagnostic sensitivity of 100% and specificity of 95.54%, superior to the standard chemiluminescence immunoassay in cardiovascular clinics. Further, we monitored biomarker concentrations regarding percutaneous coronary intervention for prognostic purpose. Our work demonstrated a designed approach using plasmonic materials for enhanced diagnosis and monitoring for prognostic use towards point-of-care testing.
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Affiliation(s)
- Wei Xu
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Lin Wang
- Department of Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Ru Zhang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Xuming Sun
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Lin Huang
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Haiyang Su
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China.,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China
| | - Xunbin Wei
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China
| | - Chia-Chun Chen
- Department of Chemistry, National Taiwan Normal University, Taipei, 11677, Taiwan
| | - Jiatao Lou
- Department of Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, China.
| | - Hongjie Dai
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Kun Qian
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, 200030, China. .,State Key Laboratory for Oncogenes and Related Genes, Division of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, 160 Pujian Road, Shanghai, 200127, China.
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13
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Kleiven Ø, Bjørkavoll-Bergseth MF, Omland T, Aakre KM, Frøysa V, Erevik CB, Greve OJ, Melberg TH, Auestad B, Skadberg Ø, Edvardsen T, Ørn S. Endurance exercise training volume is not associated with progression of coronary artery calcification. Scand J Med Sci Sports 2020; 30:1024-1032. [PMID: 32100340 DOI: 10.1111/sms.13643] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 12/18/2019] [Accepted: 02/17/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Recent cross-sectional studies have suggested a dose-dependent relationship between lifelong exposure to physical activity and the burden of calcified coronary artery disease (CAD). No longitudinal studies have addressed this concern. HYPOTHESIS Exercise volume is associated with progression of coronary artery calcium (CAC), defined as ≥10 units increase in CAC score. METHODS Sixty-one recreational athletes who were assessed by coronary computed tomography angiography (CCTA) as part of the NEEDED 2013/14 study were re-assessed 4-5 years later, in 2018. RESULTS Subjects were 45.9 ± 9.6 years old at inclusion, and 46 (74%) were male. Between 2013 and 2018, the participants reported median 5 (range: 0-20, 25th-75th percentile: 4-6) hours of high-intensity exercise per week. None of the included subjects smoked during follow-up. At inclusion, 21 (33%) participants had coronary artery calcifications. On follow-up CCTA in 2018, 15 (25%) subjects had progressive coronary calcification (≥10 Agatston units increase in CAC). These subjects were older (53 ± 9 vs 44 ± 9 years old, P = .002) and had higher levels of low-density lipoprotein at baseline (3.5 (2.9-4.3) vs 2.9 (2.3-3.5) mmol/L, P = .031) as compared to subjects with stable condition. No relationship was found between hours of endurance training per week and progression of coronary artery calcification. In multiple regression analysis, age and baseline CAC were the only significant predictors of progressive CAC. CONCLUSION No relationship between exercise training volume and the progression of coronary artery calcification was found in this longitudinal study of middle-aged recreational athletes.
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Affiliation(s)
- Øyunn Kleiven
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway.,Department of Clinical Science, University of Bergen, Bergen, Norway
| | | | - Torbjørn Omland
- Department of Medicine, Akershus University Hospital, Lorenskog, Norway.,University of Oslo, Oslo, Norway
| | - Kristin M Aakre
- Department of Clinical Science, University of Bergen, Bergen, Norway.,Hormone Laboratory, Haukeland University Hospital, Bergen, Norway
| | - Vidar Frøysa
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway
| | | | - Ole J Greve
- Department of Radiology, Stavanger University Hospital, Stavanger, Norway
| | - Tor H Melberg
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway
| | - Bjørn Auestad
- Department of Research, Stavanger University Hospital, Stavanger, Norway.,Department of Mathematics and Physics, University of Stavanger, Stavanger, Norway
| | - Øyvind Skadberg
- Department of Biochemistry, Stavanger University Hospital, Stavanger, Norway
| | - Thor Edvardsen
- University of Oslo, Oslo, Norway.,Department of Cardiology and Center for Cardiological Innovation, Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Institute for Surgical Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Stein Ørn
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway.,Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway
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14
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Bjørkavoll-Bergseth M, Kleiven Ø, Auestad B, Eftestøl T, Oskal K, Nygård M, Skadberg Ø, Aakre KM, Melberg T, Gjesdal K, Ørn S. Duration of Elevated Heart Rate Is an Important Predictor of Exercise-Induced Troponin Elevation. J Am Heart Assoc 2020; 9:e014408. [PMID: 32065043 PMCID: PMC7070191 DOI: 10.1161/jaha.119.014408] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background The precise mechanisms causing cardiac troponin (cTn) increase after exercise remain to be determined. The aim of this study was to investigate the impact of heart rate (HR) on exercise-induced cTn increase by using sports watch data from a large bicycle competition. Methods and Results Participants were recruited from NEEDED (North Sea Race Endurance Exercise Study). All completed a 91-km recreational mountain bike race (North Sea Race). Clinical status, ECG, blood pressure, and blood samples were obtained 24 hours before and 3 and 24 hours after the race. Participants (n=177) were, on average, 44 years old; 31 (18%) were women. Both cTnI and cTnT increased in all individuals, reaching the highest level (of the 3 time points assessed) at 3 hours after the race (P<0.001). In multiple regression models, the duration of exercise with an HR >150 beats per minute was a significant predictor of both cTnI and cTnT, at both 3 and 24 hours after exercise. Neither mean HR nor mean HR in percentage of maximum HR was a significant predictor of the cTn response at 3 and 24 hours after exercise. Conclusions The duration of elevated HR is an important predictor of physiological exercise-induced cTn elevation. Clinical Trial Registration URL: https://www.clinicaltrials.gov/. Unique identifier: NCT02166216.
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Affiliation(s)
- Magnus Bjørkavoll-Bergseth
- Department of Cardiology Stavanger University Hospital Stavanger Norway.,Department of Clinical Science University of Bergen Norway
| | - Øyunn Kleiven
- Department of Cardiology Stavanger University Hospital Stavanger Norway
| | - Bjørn Auestad
- Department of Research Stavanger University Hospital Stavanger Norway.,Department of Mathematics and Physics University of Stavanger Norway
| | - Trygve Eftestøl
- Department of Electrical Engineering and Computer Science University of Stavanger Norway
| | - Kay Oskal
- Department of Electrical Engineering and Computer Science University of Stavanger Norway
| | - Martin Nygård
- Department of Electrical Engineering and Computer Science University of Stavanger Norway
| | - Øyvind Skadberg
- Department of Clinical Biochemistry Stavanger University Hospital Stavanger Norway
| | - Kristin Moberg Aakre
- Department of Medical Biochemistry and Pharmacology Haukeland University Hospital Bergen Norway.,Department of Clinical Science University of Bergen Norway
| | - Tor Melberg
- Department of Cardiology Stavanger University Hospital Stavanger Norway
| | - Knut Gjesdal
- Department of Cardiology Oslo University Hospital Ullevål, and Institute of Clinical Medicine Oslo University Oslo Norway
| | - Stein Ørn
- Department of Cardiology Stavanger University Hospital Stavanger Norway.,Department of Electrical Engineering and Computer Science University of Stavanger Norway
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15
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Moon SY, Kim N, Lee SM, Yu S, Jun KR, Kim HH. 99th percentile upper reference limit of AccuTnI+3 in a Korean reference population: a multicenter study using fresh serum. Clin Chem Lab Med 2019; 57:e282-e284. [PMID: 31054248 DOI: 10.1515/cclm-2019-0189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 04/02/2019] [Indexed: 11/15/2022]
Affiliation(s)
- Soo Young Moon
- Department of Laboratory Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Namhee Kim
- Department of Laboratory Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Sun Min Lee
- Department of Laboratory Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Shinae Yu
- Department of Laboratory Medicine, Inje University Haeundae Paik Hospital, Busan, Korea
| | - Kyung Ran Jun
- Department of Laboratory Medicine, Inje University Haeundae Paik Hospital, Busan, Korea
| | - Hyung-Hoi Kim
- Department of Laboratory Medicine and Biomedical Informatics Unit, Pusan National University School of Medicine, Director of Biomedical Research Institute, Director of Pusan National University Hospital Clinical Trial Center, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, Korea.,Department of Laboratory Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, South Korea, Phone: +82-51-240-7414, Fax: +82-51-247-6560
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16
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Kleiven Ø, Omland T, Skadberg Ø, Melberg TH, Bjørkavoll-Bergseth MF, Auestad B, Bergseth R, Greve OJ, Aakre KM, Ørn S. Occult obstructive coronary artery disease is associated with prolonged cardiac troponin elevation following strenuous exercise. Eur J Prev Cardiol 2019; 27:1212-1221. [DOI: 10.1177/2047487319852808] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background Sudden cardiac death among middle-aged recreational athletes is predominantly due to myocardial ischaemia. This study examined whether measuring cardiac troponin I and T (cTnI and cTnT) after strenuous exercise could identify occult obstructive coronary artery disease. Design Prospective observational study. Methods Subjects were recruited from 1002 asymptomatic recreational cyclists completing a 91-km mountain bike race (North Sea Race Endurance Exercise Study). No subject had known cardiovascular disease or took cardiovascular medication. Blood samples were collected within 24 h before and 3 h and 24 h after the race. Coronary computed tomography angiography was performed in 80 participants with the highest post-exercise cTnI and in 40 reference subjects with moderately elevated cTnI values. Results Study subjects ( N = 120) were 45 (36–52) years old and 74% were male. There were similar demographics in the High-cTnI group and the Reference group. The cTn concentrations were highest at 3 h post-race: cTnI, 224 (125–304) ng/L; cTnT, 89 (55–124) ng/L. Nine subjects had obstructive coronary artery disease on coronary computed tomography angiography, eight of whom were High-cTnI responders. Two subjects had myocardial bridging, both High-cTnI responders. Troponin concentrations at 24 h post-race were higher in subjects with obstructive coronary artery disease than in the rest of the cohort ( n = 109): cTnI, 151 (72–233) ng/L vs. 24 (19–82) ng/L, p = 0.005; cTnT, 39 (25–55) ng/L vs. 20 (14–31) ng/L, p = 0.002. The areas under the receiver operating characteristic curves for predicting obstructive coronary artery disease were 0.79, p = 0.005 (cTnI) and 0.82, p = 0.002 (cTnT). Conclusion In subjects with occult obstructive coronary artery disease there was a prolonged elevation of cTn following strenuous exercise.
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Affiliation(s)
- Øyunn Kleiven
- Cardiology Department, Stavanger University Hospital, Norway
| | - Torbjørn Omland
- Division of Medicine, Akershus University Hospital, and University of Oslo, Oslo, Norway
| | - Øyvind Skadberg
- Department of Biochemistry, Stavanger University Hospital, Norway
| | - Tor H Melberg
- Cardiology Department, Stavanger University Hospital, Norway
| | | | - Bjørn Auestad
- Department of Research, Stavanger University Hospital, Norway
- Department of Mathematics and Physics, University of Stavanger, Norway
| | | | - Ole J Greve
- Department of Radiology, Stavanger University Hospital, Norway
| | - Kristin M Aakre
- Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway
- Hormone Laboratory, Haukeland University Hospital, Bergen, Norway
- Department of Clinical Science, University of Bergen, Norway
| | - Stein Ørn
- Cardiology Department, Stavanger University Hospital, Norway
- Department of Electrical Engineering and Computer Science, University of Stavanger, Norway
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17
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Race duration and blood pressure are major predictors of exercise-induced cardiac troponin elevation. Int J Cardiol 2019; 283:1-8. [DOI: 10.1016/j.ijcard.2019.02.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/31/2019] [Accepted: 02/19/2019] [Indexed: 11/19/2022]
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18
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Zeljkovic I, Knecht S, Pavlovic N, Celikyrut U, Spies F, Burri S, Mannhart D, Peterhans L, Reichlin T, Schaer B, Osswald S, Sticherling C, Kuhne M. High-sensitive cardiac troponin T as a predictor of efficacy and safety after pulmonary vein isolation using focal radiofrequency, multielectrode radiofrequency and cryoballoon ablation catheter. Open Heart 2019; 6:e000949. [PMID: 31168374 PMCID: PMC6519429 DOI: 10.1136/openhrt-2018-000949] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 02/26/2019] [Accepted: 03/19/2019] [Indexed: 11/06/2022] Open
Abstract
Introduction Myocardial injury markers such as high-sensitive cardiac troponin T (hs-cTnT) and creatine kinase MB (CK-MB) reflects the amount of myocardial injury with ablation. The aim of the study was to identify the value of myocardial injury markers to predict outcomes after pulmonary vein isolation (PVI) using three different ablation technologies. Methods Consecutive patients undergoing PVI using a standard 3.5 mm irrigated-tip radiofrequency catheter (RF-group), an irrigated multielectrode radiofrequency catheter (IMEA-group) and a second-generation cryoballoon (CB-group) were analysed. Blood samples to measure injury markers were taken before and 18–24 hours after the ablation. Procedural complications were collected and standardised follow-up was performed. Logistic regression was used to identify predictors of recurrence and complications. Results 96 patients (RF group: n=40, IMEA-group: n=17, CB-group: n=39) undergoing PVI only were analysed (82% male, age 59±10 years). After a follow-up of 12 months, atrial fibrillation (AF) recurred in 45% in the RF-group, 29% in the IMEA-group and 36% in the CB-group (p=0.492). Symptomatic pericarditis was observed in 20% of patients in the RF-group, 15% in the IMEA-group and 5% in the CB-group (p=0.131). None of the injury markers was predictive of AF recurrence or PV reconnection after a single procedure. However, hs-cTnT was identified as a predictor of symptomatic pericarditis (OR: 1.003 [1.001 to 1.005], p=0.015). Conclusion Hs-cTnT and CK-MB were significantly elevated after PVI, irrespective of the ablation technology used. None of the myocardial injury markers were predictive for AF recurrence or PV reconnection, but hs-cTnT release predicts the occurrence of symptomatic pericarditis after PVI.
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Affiliation(s)
- Ivan Zeljkovic
- Cardiology, University Hospital Basel, Basel, Switzerland
| | - Sven Knecht
- Cardiology, University Hospital Basel, Basel, Switzerland
| | - Nikola Pavlovic
- Cardiology, Klinicki bolnicki centar Sestre milosrdnice, Zagreb, Croatia
| | | | - Florian Spies
- Cardiology, University Hospital Basel, Basel, Switzerland
| | - Sarah Burri
- Cardiology, University Hospital Basel, Basel, Switzerland
| | | | | | | | - Beat Schaer
- Cardiology, University Hospital Basel, Basel, Switzerland
| | - Stefan Osswald
- Cardiology, University Hospital Basel, Basel, Switzerland
| | | | - Michael Kuhne
- Cardiology, University Hospital Basel, Basel, Switzerland
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19
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Consuegra-Sánchez L, Martínez-Díaz JJ, de Guadiana-Romualdo LG, Wasniewski S, Esteban-Torrella P, Clavel-Ruipérez FG, Bardají A, Castillo-Moreno JA, Kaski JC. No additional value of conventional and high-sensitivity cardiac troponin over clinical scoring systems in the differential diagnosis of type 1 vs. type 2 myocardial infarction. Clin Chem Lab Med 2019; 56:857-864. [PMID: 29303766 DOI: 10.1515/cclm-2017-0609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 12/05/2017] [Indexed: 11/15/2022]
Abstract
BACKGROUND The distinction of type 1 and type 2 myocardial infarction (MI) is of major clinical importance. Our aim was to evaluate the diagnostic ability of absolute and relative conventional cardiac troponin I (cTnI) and high-sensitivity cardiac troponin T (hs-cTnT) in the distinction between type 1 and type 2 MI in patients presenting at the emergency department with non-ST-segment elevation acute chest pain within the first 12 h. METHODS We measured cTnI (Dimension Vista) and hs-cTnT (Cobas e601) concentrations at presentation and after 4 h in 200 patients presenting with suspected acute MI. The final diagnosis, based on standard criteria, was adjudicated by two independent cardiologists. RESULTS One hundred and twenty-five patients (62.5%)were classified as type 1 MI and 75 (37.5%) were type 2 MI. In a multivariable setting, age (relative risk [RR]=1.43, p=0.040), male gender (RR=2.22, p=0.040), T-wave inversion (RR=8.51, p<0.001), ST-segment depression (RR=8.71, p<0.001) and absolute delta hs-cTnT (RR=2.10, p=0.022) were independently associated with type 1 MI. In a receiver operating characteristic curve analysis, the discriminatory power of absolute delta cTnI and hs-cTnT was significantly higher compared to relative c-TnI and hs-cTnT changes. The additive information provided by cTnI and hs-cTnT over and above the information provided by the "clinical" model was only marginal. CONCLUSIONS The diagnostic information provided by serial measurements of conventional or hs-cTnT is not better than that yielded by a simple clinical scoring model. Absolute changes are more informative than relative troponin changes.
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Affiliation(s)
| | | | | | - Samantha Wasniewski
- Servicio de Cardiología, Hospital General Universitario Santa Lucía, Cartagena, Spain
| | | | | | - Alfredo Bardají
- Servicio de Cardiología, Hospital Joan XXIII, Universidad Rovira i Virgili, Tarragona, Spain
| | | | - Juan Carlos Kaski
- Molecular and Clinical Sciences Research Centre, St George's Hospital, University of London, Cranmer Terrace, London, UK
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20
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Monneret D, Gellerstedt M, Bonnefont-Rousselot D. Determination of age- and sex-specific 99th percentiles for high-sensitive troponin T from patients: an analytical imprecision- and partitioning-based approach. Clin Chem Lab Med 2019; 56:818-829. [PMID: 29176015 DOI: 10.1515/cclm-2017-0256] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 10/10/2017] [Indexed: 01/10/2023]
Abstract
BACKGROUND Detection of acute myocardial infarction (AMI) is mainly based on a rise of cardiac troponin with at least one value above the 99th percentile upper reference limit (99th URL). However, circulating high-sensitive cardiac troponin T (hs-cTnT) concentrations depend on age, sex and renal function. Using an analytical imprecision-based approach, we aimed to determine age- and sex-specific hs-cTnT 99th URLs for patients without chronic kidney disease (CKD). METHODS A 3.8-year retrospective analysis of a hospital laboratory database allowed the selection of adult patients with concomitant plasma hs-cTnT (<300 ng/L) and creatinine concentrations, both assayed twice within 72 h with at least 3 h between measurements. Absence of AMI was assumed when the variation between serial hs-cTnT values was below the adjusted-analytical change limit calculated according to the inverse polynomial regression of analytical imprecision. Specific URLs were determined using Clinical and Laboratory Standards Institute (CLSI) methods, and partitioning was tested using the proportion method, after adjustment for unequal prevalences. RESULTS After outlier removal (men: 8.7%; women: 6.6%), 1414 men and 1082 women with estimated glomerular filtration rate (eGFR) ≥60 mL/min/1.73 m2 were assumed as non-AMI. Partitioning into age groups of 18-50, 51-70 and 71-98 years, the hs-cTnT 99th URLs adjusted on French prevalence were 18, 33, 66 and 16, 30, 84 ng/L for men and women, respectively. Age-partitioning was clearly required. However, sex-partitioning was not justified for subjects aged 18-50 and 51-70 years for whom a common hs-cTnT 99th URLs of about 17 and 31 ng/L could be used. CONCLUSIONS Based on a laboratory approach, this study supports the need for age-specific hs-cTnT 99th URLs.
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Affiliation(s)
- Denis Monneret
- Department of Metabolic Biochemistry, La Pitié Salpêtrière-Charles Foix University Hospital (AP-HP), Paris, France
| | - Martin Gellerstedt
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, SSORG-Scandinavian Surgical Outcomes Research Group, Sahlgrenska University Hospital/Östra, Gothenburg, Sweden.,School of Business, Economics and IT, University West, Göteborg, Sweden
| | - Dominique Bonnefont-Rousselot
- Department of Metabolic Biochemistry, La Pitié Salpêtrière-Charles Foix University Hospital (AP-HP), Paris, France.,Faculty of Pharmacy, Department of Biochemistry, Paris Descartes University, Paris, France.,CNRS UMR8258 - INSERM U1022, Faculty of Pharmacy, Paris Descartes University, Paris, France
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21
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Sex-Specific Cut-Offs for High-Sensitivity Cardiac Troponin: Is Less More? Cardiovasc Ther 2019; 2019:9546931. [PMID: 31772621 PMCID: PMC6739766 DOI: 10.1155/2019/9546931] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 01/08/2019] [Accepted: 01/16/2019] [Indexed: 12/25/2022] Open
Abstract
Management of patients presenting to the Emergency Department with chest pain is continuously evolving. In the setting of acute coronary syndrome, the availability of high-sensitivity cardiac troponin assays (hs-cTn) has allowed for the development of algorithms aimed at rapidly assessing the risk of an ongoing myocardial infarction. However, concerns were raised about the massive application of such a simplified approach to heterogeneous real-world populations. As a result, there is a potential risk of underdiagnosis in several clusters of patients, including women, for whom a lower threshold for hs-cTn was suggested to be more appropriate. Implementation in clinical practice of sex-tailored cut-off values for hs-cTn represents a hot topic due to the need to reduce inequality and improve diagnostic performance in females. The aim of this review is to summarize current evidence on sex-specific cut-off values of hs-cTn and their application and usefulness in clinical practice. We also offer an extensive overview of thresholds reported in literature and of the mechanisms underlying such differences among sexes, suggesting possible explanations about debated issues.
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22
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Di Pietro M, Dipalo M, Rocchi MBL, Musa R, Avanzini P, Gnocchi C, Anelli MC, Aloe R. Assessment of Access hsTnI 99th percentiles upper reference limits following IFCC recommendations. Clin Chim Acta 2019; 492:26-28. [PMID: 30711523 DOI: 10.1016/j.cca.2019.01.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/30/2019] [Accepted: 01/30/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND The detection of an increase and/or decrease of cardiac troponin (cTnI) values, with at least one value above the 99th percentile of the upper reference limit (URL) have a central role in acute myocardial infarction (AMI) diagnosis. The employment of sex specific 99th percentile URLs and High-sensitivity (Hs) assays are recommended. We assessed sex specific 99th percentile URL for Access Hs-cTnI and AccuTnI3+ (Beckman Coulter) using European donor reference population following recent International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) recommendations. METHODS 300 males and 300 females plasma samples were collected. Both chemiluminescent immunoenzymatic assays were performed on UniCel DxI 800 platform (Beckman Coulter). RESULTS For Access hsTnI, the observed sex-specific 99th percentile URLs were 5.5 (90% CI: 4.4-7.6) for females and 13.9 ng/L (90% CI: 7.4-17.4) for males. For AccuTnI+3 we could not establish them because the assay couldn't report detectable values of troponin for most of the analyzed samples. CONCLUSION The sex-specific 99th percentile URLs established for Access hsTnI assay were significantly lower than those declared by the manufacturer caused by the different choice of population selection, age groups and sample types: for those reasons, we maintain the 99th URLs provided by manufacturer.
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Affiliation(s)
- Martina Di Pietro
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy.
| | - Mariella Dipalo
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Marco Bruno Luigi Rocchi
- Dipartimento di Scienze Biomolecolari, Università degli studi di Urbino "Carlo Bo", Via Ca' Le Suore, 2-4, 61029 Urbino, Italy
| | - Roberta Musa
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Paola Avanzini
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy
| | - Cecilia Gnocchi
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy
| | | | - Rosalia Aloe
- SSD Biochimica ad Elevata Automazione, Azienda Ospedaliero-Universitaria di Parma, Via Gramsci 14, 43126 Parma, Italy
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23
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Clerico A, Zaninotto M, Padoan A, Masotti S, Musetti V, Prontera C, Ndreu R, Zucchelli G, Passino C, Migliardi M, Plebani M. Evaluation of analytical performance of immunoassay methods for cTnI and cTnT: From theory to practice. Adv Clin Chem 2019; 93:239-262. [PMID: 31655731 DOI: 10.1016/bs.acc.2019.07.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Current guidelines worldwide recommend cardiac troponins I (cTnI) and T (cTnT) as the biomarkers of choice for the differential diagnosis of acute coronary syndrome (ACS), and the measurement of the 99th upper reference population limit (URL) value for cardiac troponins, with an imprecision of ≤10 CV%. Measuring the 99th URL of cTnI and cTnT is a challenging analytical task due to low biomarker concentrations present in healthy subjects. Therefore, since the year 2006, several manufacturers have established new generation cTnI and cTnT immunoassays with an improved analytical sensitivity in accordance with the quality specifications described in international guidelines, the more recent of which state that only immunoassays that meet the required quality specifications should be considered "high-sensitivity" methods. For the early diagnosis of ACS, and for the stratification of cardiovascular risk in cardiac patients and the general population, high-sensitivity methods should be employed. It is therefore important for laboratory professionals and clinicians to gain a thorough understanding of the analytical performances of immunoassay methods for cTnI and cTnT, especially at low to normal concentration ranges. The aim of the present study was to analyze critical aspects related to definition, analytical performance, pathophysiological interpretations, and the clinical relevance of high-sensitivity cardiac troponin assays.
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Affiliation(s)
- Aldo Clerico
- Fondazione CNR, Regione Toscana G. Monasterio and Scuola Superiore Sant'Anna, Pisa, Italy.
| | - Martina Zaninotto
- Department of Laboratory Medicine, University Hospital, Padova, Italy
| | - Andrea Padoan
- Department of Laboratory Medicine, University Hospital, Padova, Italy
| | - Silvia Masotti
- Fondazione CNR, Regione Toscana G. Monasterio and Scuola Superiore Sant'Anna, Pisa, Italy
| | - Veronica Musetti
- Fondazione CNR, Regione Toscana G. Monasterio and Scuola Superiore Sant'Anna, Pisa, Italy
| | - Concetta Prontera
- Fondazione CNR, Regione Toscana G. Monasterio and Scuola Superiore Sant'Anna, Pisa, Italy
| | - Rudina Ndreu
- QualiMedLab and CNR Clinical Physiology Institute, Pisa, Italy
| | | | - Claudio Passino
- Fondazione CNR, Regione Toscana G. Monasterio and Scuola Superiore Sant'Anna, Pisa, Italy
| | - Marco Migliardi
- S.C. Laboratorio Analisi, A.O. Ordine Mauriziano di Torino, Torino, Italy
| | - Mario Plebani
- Department of Laboratory Medicine, University Hospital, Padova, Italy
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24
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Árnadóttir Á, Vestergaard KR, Sölétormos G, Steffensen R, Goetze JP, Iversen K. Prediction of coronary heart disease or heart failure using high-sensitivity cardiac troponin T: A pilot study. Eur J Clin Invest 2018; 48:e13009. [PMID: 30062798 DOI: 10.1111/eci.13009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Accepted: 07/28/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND High-sensitivity cardiac troponin T (hs-cTnT) is a good prognostic marker for mortality. However, it is uncertain if hs-cTnT can be used to detect sub-clinical cardiac disease. METHOD Pilot study in patients without known heart disease and elevated hs-cTnT measured at presentation to the emergency department. Hs-cTnT was measure with Roche Diagnostics. Echocardiography was used to assess structural heart disease and the participants underwent computed tomography angiography for assessment of coronary artery disease and agatston score. RESULTS Ten patients were included in the final cohort. Median age was 68 years IQR (57-78) and 80% were female (n = 8). Six patients had a history of chronic obstructive lung disease and five patients had history of hypertension. The median level of hs-cTnT was 26 ng/L and values ranged from 19 ng/L to 495 ng/L. The median calcium score was 12. Three patients had signs of coronary artery disease. All patients had normal left ventricular ejection fraction with a median LVEF at 54.5%. Two patients were noted to have increased left ventricular mass index (LVMI). CONCLUSION The majority of patients with hs-cTnT above the 99th percentile did not have structural heart disease or ischaemic coronary disease. However, 30% of the patient did have signs of coronary disease and might benefit from preventive medical treatment. Measuring hs-cTnT in the absence of acute illness might be a better approach for evaluation for sub-clinical cardiac disease.
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Affiliation(s)
| | | | | | - Rolf Steffensen
- Department of Cardiology, Nordsjaellands Hospital, Hillerød, Denmark
| | - Jens P Goetze
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen, Denmark
| | - Kasper Iversen
- Department of Cardiology, Herlev-Gentofte Hospital, Copenhagen, Denmark
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25
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Tsui AKY, Lyon ME, van Diepen S, Goudreau BL, Thomas D, Higgins T, Raizman JE, Füzéry AK, Rodriguez-Capote K, Estey M, Cembrowski G. Analytical Concordance of Diverse Point-of-Care and Central Laboratory Troponin I Assays. J Appl Lab Med 2018; 3:764-774. [PMID: 31639752 DOI: 10.1373/jalm.2018.026690] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 08/07/2018] [Indexed: 11/06/2022]
Abstract
BACKGROUND Cardiac troponin I (cTnI) 99th percentile cutoffs, used in the diagnosis of acute myocardial infarction, are not standardized across cTnI assays. We compared 3 point-of-care (POC) and 1 central laboratory contemporary cTnI assays against the Abbott high-sensitivity (hs) cTnI to evaluate the analytical concordance and the feasibility of using a single cutoff value for all assays. METHODS Fresh blood samples collected from 102 inpatients in the coronary care unit were measured on central laboratory instruments (Beckman Coulter DxI AccuTnI+3 TnI, Abbott Architect hs-TnI) and cTnI POC analyzers (Alere Triage Troponin I, Radiometer AQT90, Abbott i-STAT). Agreement and correlation between the contemporary cTnI assays and hs-cTnI assay were assessed using regression analysis. Proportional bias was assessed using Bland-Altman plots. Concordance between the contemporary cTnI and hs-cTnI assays was determined by diagnostic contingency tables at specific cutoffs. RESULTS Most POC cTnI assays had excellent correlation with the Abbott hs-cTnI method (r 2 = 0.955-0.970) except for Alere Triage (r 2 = 0.617), while proportional bias is evident between all cTnI assays. Overall concordance between POC contemporary cTnI assays and hs-cTnI assay was 80% to 90% at their respective 99th percentile cutoffs. The concordance increased to 90% to 95% when a fixed cutoff of 0.03 to 0.05 ng/mL was used across the assays. CONCLUSIONS This study demonstrates poor analytical concordance between cTnI assays at the 99th percentile and supports the notion of a single clinical decision limit for cTnI and consequently standardization of diagnostic protocols despite the analytical differences among these assays.
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Affiliation(s)
- Albert K Y Tsui
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada; .,Department of Laboratory Medicine and Pathology, Alberta Health Services, Edmonton, AB, Canada
| | - Martha E Lyon
- Department of Pathology and Laboratory Medicine, Saskatoon Health Region, Saskatoon, SK, Canada
| | - Sean van Diepen
- Department of Critical Care Medicine, Division of Cardiology, University of Alberta, Edmonton, AB, Canada
| | - Bobbi Lynn Goudreau
- Department of Laboratory Medicine and Pathology, Alberta Health Services, Edmonton, AB, Canada
| | - Dylan Thomas
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,DynaLIFE Medical Labs, Edmonton, AB, Canada
| | - Trefor Higgins
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,DynaLIFE Medical Labs, Edmonton, AB, Canada
| | - Joshua E Raizman
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,Department of Laboratory Medicine and Pathology, Alberta Health Services, Edmonton, AB, Canada
| | - Anna K Füzéry
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,Department of Laboratory Medicine and Pathology, Alberta Health Services, Edmonton, AB, Canada
| | - Karina Rodriguez-Capote
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,DynaLIFE Medical Labs, Edmonton, AB, Canada
| | - Mathew Estey
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,DynaLIFE Medical Labs, Edmonton, AB, Canada
| | - George Cembrowski
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.,Department of Laboratory Medicine and Pathology, Alberta Health Services, Edmonton, AB, Canada
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26
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Mueller T, Egger M, Peer E, Jani E, Dieplinger B. Evaluation of sex-specific cut-off values of high-sensitivity cardiac troponin I and T assays in an emergency department setting - Results from the Linz Troponin (LITROP) study. Clin Chim Acta 2018; 487:66-74. [PMID: 30227114 DOI: 10.1016/j.cca.2018.09.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/24/2018] [Accepted: 09/13/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND The aim of the present analysis was to evaluate sex-specific cut-off values of a high-sensitivity cardiac troponin T (hs-cTnT) assay and a high-sensitivity cardiac troponin I (hs-cTnI) assay in an emergency department setting. METHODS We retrospectively studied 1945 male and 1643 female emergency department patients in whom we had measured both Roche hs-cTnT and Abbott hs-cTnI routinely upon every troponin measurement request. We performed reclassification analyses of sex-specific thresholds versus sex-neutral thresholds of both assays. In addition, we performed sensitivity analyses to find those sex-specific cut-off values for the Roche hs-cTnT and the Abbott hs-cTnI assays with the lowest possible rate of discordant classifications by both assays. RESULTS Compared with the classification by the sex-neutral thresholds (i.e., 14 ng/L for hs-cTnT and 26 ng/L for hs-cTnI), using sex-specific thresholds (i.e., 16 ng/L in males and 9 ng/L in females for hs-cTnT; and in 34 ng/L males and 16 ng/L in females for hs-cTnI) resulted in a total reclassification rate of 4% for hs-cTnT and 3% for hs-cTnI in male individuals, and of 11% and 6%, respectively, in female individuals. In our cohort, the sex-specific hs-cTnT cut-off values currently in use (i.e., 16 ng/L in males and 9 ng/L in females) were best matched to a hs-cTnI cut-off value of 11 ng/L in male and 5 ng/L in female individuals. Conversely, the sex-specific hs-cTnI cut-off values currently in use (i.e., 34 ng/L in males and 16 ng/L in females) were best matched to a hs-cTnT cut-off value of 49 ng/L in male and 24 ng/L in female individuals. These "harmonised" cut-off values reduced discordant classifications between both assays by 43-68% compared to using cut-off values currently in use. CONCLUSION Especially in women, reclassification rates were high, when using sex specific versus sex-neutral thresholds. Best matching cut-off values for hs-cTnT and hs-cTnI were markedly different to those currently in use. These "harmonised" cut-off values minimised discordant classifications between both assays.
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Affiliation(s)
- Thomas Mueller
- Department of Clinical Pathology, Hospital of Bolzano, Bolzano, Italy.
| | - Margot Egger
- Department of Laboratory Medicine, Konventhospital Barmherzige Brueder Linz, Linz, Austria
| | - Evi Peer
- Department of Clinical Pathology, Hospital of Bolzano, Bolzano, Italy
| | - Erika Jani
- Department of Clinical Pathology, Hospital of Bolzano, Bolzano, Italy
| | - Benjamin Dieplinger
- Department of Laboratory Medicine, Konventhospital Barmherzige Brueder Linz, Linz, Austria
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27
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Gualandro DM, Puelacher C, LuratiBuse G, Lampart A, Strunz C, Cardozo FA, Yu PC, Jaffe AS, Barac S, Bock L, Badertscher P, du Fay de Lavallaz J, Marbot S, Sazgary L, Bolliger D, Rentsch K, Twerenbold R, Hammerer-Lercher A, Melo ES, Calderaro D, Duarte AJ, de Luccia N, Caramelli B, Mueller C. Comparison of high-sensitivity cardiac troponin I and T for the prediction of cardiac complications after non-cardiac surgery. Am Heart J 2018; 203:67-73. [PMID: 30041065 DOI: 10.1016/j.ahj.2018.06.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 06/30/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND We aimed to directly compare preoperative high-sensitivity cardiac troponin (hs-cTn) I and T concentration for the prediction of major cardiac complications after non-cardiac surgery. METHODS We measured hs-cTnI and hs-cTnT preoperatively in a blinded fashion in 1022 patients undergoing non-cardiac surgery. The primary endpoint was a composite of major cardiac complications including cardiac death, cardiac arrest, myocardial infarction, clinically relevant arrhythmias, and acute heart failure within 30 days. We hypothesized that the type of surgery may impact on the predictive accuracy of hs-cTnI/T and stratified all analyses according to the type of surgery. RESULTS Major cardiac complications occurred in 108 (11%) patients, 58/243 (24%) patients undergoing vascular surgery and 50/779 (6%, P < .001) patients undergoing non-vascular surgery. Using regulatory-approved 99th percentile cut-off concentrations, preoperative hs-cTnI elevations were less than one-fifth as common as preoperative hs-cTnT elevations (P < .001). Among patients undergoing vascular surgery, preoperative hs-cTnI concentrations, but not hs-cTnT, was an independent predictor of cardiac complications (adjusted odds ratio (aOR) 1.5, 95% confidence interval (95% CI) 1.0-2.1). The area under the receiver-operating characteristics curve (AUC) was 0.67 (95% CI, 0.59-0.75) for hs-cTnI versus 0.59 (95% CI 0.51-0.67, P = .012) for hs-cTnT. In contrast, among patients undergoing non-vascular surgery both preoperative hs-cTnI and hs-cTnT were independent predictors of the primary endpoint (aOR 1.6, 95% CI 1.3-2.0, and aOR 3.0, 95% CI 2.0-4.6, respectively) and showed higher predictive accuracy (AUC 0.77, 95% CI, 0.71-0.83, and 0.79, 95% CI 0.73-0.85, P = ns). CONCLUSIONS Preoperative hs-cTnI and hs-cTnT concentrations predict major cardiac complications after non-vascular surgery, while, in patients undergoing vascular surgery, hs-cTnI may have better accuracy.
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Affiliation(s)
- Danielle M Gualandro
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil; Department of Cardiology, University Hospital Basel, University of Basel, Switzerland.
| | - Christian Puelacher
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | - Giovanna LuratiBuse
- Department of Anaesthesiology, University Hospital Düsseldorf, Germany; Department of Anaesthesiology, University Hospital Basel, University of Basel, Switzerland
| | - Andreas Lampart
- Department of Anaesthesiology, University Hospital Basel, University of Basel, Switzerland
| | - Celia Strunz
- Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Francisco A Cardozo
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Pai C Yu
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Allan S Jaffe
- Department of Cardiology and Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, USA
| | - Sanela Barac
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | - Lukas Bock
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | - Patrick Badertscher
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | | | - Stella Marbot
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | - Lorraine Sazgary
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
| | - Daniel Bolliger
- Department of Anaesthesiology, University Hospital Basel, University of Basel, Switzerland
| | - Katharina Rentsch
- Department of Laboratory Medicine, University Hospital Basel, Switzerland
| | - Raphael Twerenbold
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland; Department of General and Interventional Cardiology, Hamburg University Heart Center, Hamburg, Germany
| | | | - Edielle S Melo
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Daniela Calderaro
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Alberto Js Duarte
- Laboratory of Immunogenetics and Experimental Transplantation, University of Sao Paulo Medical School, Brazil
| | - Nelson de Luccia
- Vascular and Endovascular Surgery Clinic of the Clinics Hospital, University of São Paulo Medical School, Brazil
| | - Bruno Caramelli
- Interdisciplinary Medicine in Cardiology Unit, Cardiology Department, Heart Institute (InCor), University of Sao Paulo Medical School, Brazil
| | - Christian Mueller
- Department of Cardiology, University Hospital Basel, University of Basel, Switzerland
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28
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Kimenai DM, Janssen EBNJ, Eggers KM, Lindahl B, den Ruijter HM, Bekers O, Appelman Y, Meex SJR. Sex-Specific Versus Overall Clinical Decision Limits for Cardiac Troponin I and T for the Diagnosis of Acute Myocardial Infarction: A Systematic Review. Clin Chem 2018; 64:1034-1043. [PMID: 29844245 DOI: 10.1373/clinchem.2018.286781] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 04/24/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND The overall clinical decision limits of high-sensitivity cardiac troponin I (hs-cTnI; 26 ng/L) and T (hs-cTnT; 14 ng/L) may contribute to underdiagnosis of acute myocardial infarction in women. We performed a systematic review to investigate sex-specific and overall 99th percentiles of hs-cTnI and hs-cTnT derived from healthy reference populations. CONTENT We searched in PubMed and EMBASE for original studies, and by screening reference lists. Reference populations designed to establish 99th percentiles of hs-cTnI (Abbott) and/or hs-cTnT (Roche), published between January 2009 and October 2017, were included. Sex-specific and overall 99th percentile values of hs-cTnI and hs-cTnT were compared with overall clinical decision ranges (hs-cTnI, 23-30 ng/L; hs-cTnT, 13-25 ng/L). Twenty-eight studies were included in the systematic review. Of 16 hs-cTnI and 18 hs-cTnT studies, 14 (87.5%) and 11 (61.1%) studies reported lower female-specific hs-cTn cutoffs than overall clinical decision ranges, respectively. Conversely, male-specific thresholds of both hs-cTnI and hs-cTnT were in line with currently used overall thresholds, particularly hs-cTnT (90% concordance). The variation of estimated overall 99th percentiles was much higher for hs-cTnI than hs-cTnT (29.4% vs 80.0% of hs-cTnI and hs-cTnT studies reported values within the current overall clinical decision range, respectively). SUMMARY Our data show substantially lower female-specific upper reference limits of hs-cTnI and hs-cTnT than overall clinical decision limits of 26 ng/L and 14 ng/L, respectively. The statistical approach strongly affects the hs-cTnI threshold. Downward adjustment of hs-cTn thresholds in women may be warranted to reduce underdiagnosis of acute myocardial infarction in women.
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Affiliation(s)
- Dorien M Kimenai
- Department of Central Diagnostic Laboratory, Clinical Chemistry, Maastricht University Medical Center, Maastricht, the Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Emma B N J Janssen
- Department of Central Diagnostic Laboratory, Clinical Chemistry, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Kai M Eggers
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Bertil Lindahl
- Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
| | - Hester M den Ruijter
- Laboratory of Experimental Cardiology, University Medical Center Utrecht, University of Utrecht, Utrecht, the Netherlands
| | - Otto Bekers
- Department of Central Diagnostic Laboratory, Clinical Chemistry, Maastricht University Medical Center, Maastricht, the Netherlands.,CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Yolande Appelman
- Department of Cardiology, VU University Medical Center, Amsterdam, the Netherlands
| | - Steven J R Meex
- Department of Central Diagnostic Laboratory, Clinical Chemistry, Maastricht University Medical Center, Maastricht, the Netherlands; .,CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
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Pretorius CJ, Tate JR, Wilgen U, Cullen L, Ungerer JP. A critical evaluation of the Beckman Coulter Access hsTnI : Analytical performance, reference interval and concordance. Clin Biochem 2018. [DOI: 10.1016/j.clinbiochem.2018.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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30
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Árnadóttir Á, Vestergaard KR, Pallisgaard J, Sölétormos G, Steffensen R, Goetze JP, Iversen K. High-sensitivity cardiac troponin T is superior to troponin I in the prediction of mortality in patients without acute coronary syndrome. Int J Cardiol 2018; 259:186-191. [DOI: 10.1016/j.ijcard.2018.01.131] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 11/08/2017] [Accepted: 01/30/2018] [Indexed: 01/30/2023]
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Panteghini M. How Clinical Laboratories May Improve Their Performance: The “High-Sensitivity” Troponin Paradigm. Clin Chem 2018; 64:621-623. [DOI: 10.1373/clinchem.2017.285577] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 01/02/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Mauro Panteghini
- Department of Biomedical and Clinical Sciences Luigi Sacco, University of Milan Medical School, Milan, Italy
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32
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The cardiac troponin response following physical exercise in relation to biomarker criteria for acute myocardial infarction; the North Sea Race Endurance Exercise Study (NEEDED) 2013. Clin Chim Acta 2018; 479:155-159. [DOI: 10.1016/j.cca.2018.01.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/19/2018] [Accepted: 01/19/2018] [Indexed: 11/22/2022]
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33
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Wu AHB, Christenson RH, Greene DN, Jaffe AS, Kavsak PA, Ordonez-Llanos J, Apple FS. Clinical Laboratory Practice Recommendations for the Use of Cardiac Troponin in Acute Coronary Syndrome: Expert Opinion from the Academy of the American Association for Clinical Chemistry and the Task Force on Clinical Applications of Cardiac Bio-Markers of the International Federation of Clinical Chemistry and Laboratory Medicine. Clin Chem 2018; 64:645-655. [DOI: 10.1373/clinchem.2017.277186] [Citation(s) in RCA: 251] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 12/12/2017] [Indexed: 12/16/2022]
Abstract
Abstract
This document is an essential companion to the third iteration of the National Academy of Clinical Biochemistry [NACB,8 now the American Association for Clinical Chemistry (AACC) Academy] Laboratory Medicine Practice Guidelines (LMPG) on cardiac markers. The expert consensus recommendations were drafted in collaboration with the International Federation of Clinical Chemistry and Laboratory Medicine Task Force on Clinical Applications of Bio-Markers (IFCC TF-CB). We determined that there is sufficient clinical guidance on the use of cardiac troponin (cTn) testing from clinical practice groups. Thus, in this expert consensus document, we focused on clinical laboratory practice recommendations for high-sensitivity (hs)-cTn assays. This document utilized the expert opinion class of evidence to focus on the following 10 topics: (a) quality control (QC) utilization, (b) validation of the lower reportable analytical limits, (c) units to be used in reporting measurable concentrations for patients and QC materials, (d) 99th percentile sex-specific upper reference limits to define the reference interval; (e) criteria required to define hs-cTn assays, (f) communication with clinicians and the laboratory's role in educating clinicians regarding the influence of preanalytic and analytic problems that can confound assay results, (g) studies on hs-cTn assays and how authors need to document preanalytical and analytical variables, (h) harmonizing and standardizing assay results and the role of commutable materials, (i) time to reporting of results from sample receipt and sample collection, and (j) changes in hs-cTn concentrations over time and the role of both analytical and biological variabilities in interpreting results of serial blood collections.
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Affiliation(s)
- Alan H B Wu
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA
| | | | - Dina N Greene
- Department of Laboratory Medicine, University of Washington, Seattle, WA
| | - Allan S Jaffe
- Departments of Cardiology and Laboratory Medicine, Mayo Clinic, Rochester, MN
| | - Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | | | - Fred S Apple
- Department of Laboratory Medicine and Pathology, Hennepin County Medical Center and University of Minnesota, Minneapolis, MN
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34
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Ayan M, Gheith Z, Ananthula A, Salih M, Vallurupalli S, Mehta JL. Multiple admissions to the coronary care unit due to falsely elevated cardiac troponin. Proc (Bayl Univ Med Cent) 2018; 31:197-199. [PMID: 29706818 DOI: 10.1080/08998280.2018.1440856] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 12/27/2017] [Accepted: 12/28/2017] [Indexed: 10/17/2022] Open
Abstract
The measurement of cardiac troponin, released from injured cardiomyocytes, is of paramount importance in the diagnosis of acute myocardial infarction. Elevated troponin can be encountered, however, in patients with cardiomyopathy, significant cardiac arrhythmias, vasculitis, right-sided heart strain, critical systemic illnesses, stroke, drug toxicity (such as Adriamycin), poisons (such as snake venoms), renal failure, seizure, and rhabdomyolysis. If the clinical picture is not consistent with any of these causes, a false-positive result should be considered. We herein describe a 94-year-old man with a prior history of coronary artery disease who presented with altered mental status and was found to have a persistently high troponin level resulting in three admissions to the coronary care unit for various noncardiac complaints. Because of discordance between clinical and laboratory data, immunological interference due to heterophile antibodies in the locally used assay (AccuTnI+3, Beckman Coulter) was suspected. The same serum sample tested on a different assay (Elecsys Troponin I Assay, Roche) resulted in an undetectable cardiac troponin I level, thus confirming the diagnosis.
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Affiliation(s)
- Mohamed Ayan
- Department of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Zaid Gheith
- Department of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Aneesha Ananthula
- Department of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Mohsin Salih
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky
| | - Srikanth Vallurupalli
- Department of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Jawahar L Mehta
- Department of Cardiovascular Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
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Kavsak PA, Roy C, Malinowski P, Mark CT, Scott T, Clark L, Lamers S, Ainsworth C. Macrocomplexes and discordant high-sensitivity cardiac troponin concentrations. Ann Clin Biochem 2017; 55:500-504. [PMID: 28920468 DOI: 10.1177/0004563217734883] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background Analytical comparisons between different high-sensitivity cardiac troponin (hs-cTn) assays are important for reassurance of results performed with different methodologies and to identify potential interferences or confounders to result interpretation. Our objective in the present study was to compare Beckman Coulter's latest hs-cTnI assay to Abbott's hs-cTnI assay and to assess agreement between results. Methods Two hundred ethylenediaminetetraacetic acid plasma samples that had clinically reported hs-cTnI results from the Abbott ARCHITECTi2000 that spanned the analytical range were stored (median = 4 h), re-centrifuged and retested for hs-cTnI on the Abbott ARCHITECTi1000 and Beckman Coulter Access2 analysers. Passing-Bablok regression and fold-differences were evaluated, with differences approximately three-fold between results further subjected to Roche hs-cTnT testing and polyethylene glycol precipitation. Results The Beckman and Abbott hs-cTnI concentrations were correlated ( r = 0.95) with Beckman yielding proportionally lower concentrations (slope = 0.78; 95%CI: 0.74-0.85). There were 12 samples that yielded Abbott hs-TnI concentrations ≥3-fold higher than the Beckman hs-cTnI concentrations; of which nine samples from seven different patients had sufficient quantity for additional testing. All seven patients had macrocomplexes as determined with polyethylene glycol precipitation that affected the Abbott hs-cTnI assay. One patient with Abbott hs-cTnI results >1300 ng/L had polyethylene glycol, heterophile antibodies and creatine kinase-MB testing performed which confirmed that a macrocomplex most likely affected the Abbott and Roche (hs-cTnT = 65 ng/L) assays but not the Beckman (hs-cTnI = 12 ng/L) assay. Conclusion The hs-cTnI concentrations obtained from ethylenediaminetetraacetic acid plasma between the Beckman and Abbott assays are highly correlated, with large differences in concentrations (≥3-fold) between Abbott and Beckman assays possible due to macrocomplexes.
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Affiliation(s)
- Peter A Kavsak
- 1 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada.,2 Core Laboratory, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Chantele Roy
- 3 Clinical Research Laboratory and Biobank, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Paul Malinowski
- 3 Clinical Research Laboratory and Biobank, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Ching-Tong Mark
- 2 Core Laboratory, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Terry Scott
- 2 Core Laboratory, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Lorna Clark
- 2 Core Laboratory, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Shana Lamers
- 3 Clinical Research Laboratory and Biobank, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Craig Ainsworth
- 4 Coronary Care Unit, Hamilton General Hospital, Hamilton Health Sciences, Hamilton, ON, Canada
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Ungerer JPJ, Pretorius CJ. Method comparison – a practical approach based on error identification. ACTA ACUST UNITED AC 2017; 56:1-4. [DOI: 10.1515/cclm-2017-0842] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Jacobus Petrus Johannes Ungerer
- Director of Chemical Pathology, Pathology Queensland, Queensland Health , Block 7, Royal Brisbane Hospital , Brisbane, 4029 QLD , Australia , Phone: +61 7 3646 8420, Fax: +61 7 3646 1392
| | - Carel Jacobus Pretorius
- Chemical Pathologist, Pathology Queensland, Queensland Health , Brisbane , Australia ; and University of Queensland, Faculty of Health and Behavioural Sciences , Brisbane , Australia
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Aakre KM, Kleiven Ø, Skadberg Ø, Bjørkavoll-Bergseth MF, Melberg T, Strand H, Hagve TA, Ørn S. The copeptin response after physical activity is not associated with cardiac biomarkers or asymptomatic coronary artery disease: The North Sea Race Endurance Exercise Study (NEEDED) 2013. Clin Biochem 2017; 52:8-12. [PMID: 29079359 DOI: 10.1016/j.clinbiochem.2017.10.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/06/2017] [Accepted: 10/13/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Copeptin concentrations increase both during acute coronary syndrome and following physical exercise. The relationship between copeptin increase following physical exercise and coronary artery disease (CAD) is uncertain. The aim of this study was to 1) describe the copeptin response following strenuous physical exercise, and 2) investigate the determinants of exercise induced copeptin concentrations, particularly in relation to cardiac biomarkers and CAD. METHODS Serum samples were collected from 97 recreational cyclists 24h before, and immediately, 3 and 24h after a 91-km bike race. Three subjects were subsequently diagnosed with significant asymptomatic CAD. Delta copeptin concentrations were correlated to patient characteristics and to biomarker concentrations. RESULTS Participants were 42.8±9.6years, and 76.3% were male. Copeptin concentrations increased to maximal levels immediately after the race and were normalized in >90% after 3h. A total of 53% and 39% exceeded the 95th and 99th percentile of the assay (10 and 19pmol/L) respectively. In multivariate models, race time, serum sodium, creatinine and cortisol were significant predictors of copeptin levels. There was no correlation between changes in copeptin and changes in cardiac biomarkers (hs-cTnI, hs-cTnT and BNP). Copeptin concentrations were normal in the subjects with asymptomatic CAD. CONCLUSIONS The moderate, short-term, exercise induced copeptin increase observed in the present study was not related to hs-cTn or BNP levels. Copeptin was normal in three asymptomatic recreational athletes with significant CAD.
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Affiliation(s)
- Kristin M Aakre
- Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway.
| | - Øyunn Kleiven
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway
| | - Øyvind Skadberg
- Laboratory of Clinical Biochemistry, Stavanger University Hospital, Stavanger, Norway
| | | | - Tor Melberg
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway
| | - Heidi Strand
- Multidisciplinary Laboratory Medicine and Medical Biochemistry, Akershus University Hospital, Lørenskog, Norway
| | - Tor-Arne Hagve
- Multidisciplinary Laboratory Medicine and Medical Biochemistry, Akershus University Hospital, Lørenskog, Norway; Institute of clinical medicine, Akershus University Hospital, University of Oslo, Norway
| | - Stein Ørn
- Cardiology Department, Stavanger University Hospital, Stavanger, Norway; Department of Electrical Engineering and Computer Science, University of Stavanger, Norway
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Herman DS, Kavsak PA, Greene DN. Variability and Error in Cardiac Troponin Testing: An ACLPS Critical Review. Am J Clin Pathol 2017; 148:281-295. [PMID: 28967956 DOI: 10.1093/ajcp/aqx066] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES To provide a comprehensive overview of the complexities associated with cardiac troponin (cTn) testing. An emphasis is placed on the sources of error, organized into the preanalytical, analytical, and postanalytical phases of the testing pathway. Controversial areas are also explored. METHODS A case scenario and review of the relevant literature describing laboratory considerations involving cTn testing are described. RESULTS Advanced comprehension of the specific assay used in a given laboratory is necessary for optimal reporting, utilization, and quality monitoring of cTn. CONCLUSIONS cTn assays are reliable diagnostic tests for acute myocardial infarction, but understanding their limitations is required for appropriate result interpretation.
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Affiliation(s)
- Daniel S Herman
- Department of Pathology and Laboratory Medicine, University of Pennsylvania,Philadelphia
| | - Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University,Hamilton, Canada
| | - Dina N Greene
- Department of Laboratory Medicine, University of Washington, Seattle
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Kozinski M, Krintus M, Kubica J, Sypniewska G. High-sensitivity cardiac troponin assays: From improved analytical performance to enhanced risk stratification. Crit Rev Clin Lab Sci 2017; 54:143-172. [DOI: 10.1080/10408363.2017.1285268] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Marek Kozinski
- Department of Principles of Clinical Medicine, Nicolaus Copernicus University, Collegium Medicum, Bydgoszcz, Poland
| | - Magdalena Krintus
- Department of Laboratory Medicine, Nicolaus Copernicus University, Collegium Medicum, Bydgoszcz, Poland
| | - Jacek Kubica
- Department of Cardiology and Internal Medicine, Nicolaus Copernicus University, Collegium Medicum, Bydgoszcz, Poland
| | - Grazyna Sypniewska
- Department of Laboratory Medicine, Nicolaus Copernicus University, Collegium Medicum, Bydgoszcz, Poland
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Christenson RH, Jacobs E, Uettwiller-Geiger D, Estey MP, Lewandrowski K, Koshy TI, Kupfer K, Li Y, Wesenberg JC. Comparison of 13 Commercially Available Cardiac Troponin Assays in a Multicenter North American Study. ACTA ACUST UNITED AC 2017; 1:544-561. [DOI: 10.1373/jalm.2016.022640] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 12/27/2016] [Indexed: 11/06/2022]
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Lyon AW, Kavsak PA, Lyon OAS, Worster A, Lyon ME. Simulation Models of Misclassification Error for Single Thresholds of High-Sensitivity Cardiac Troponin I Due to Assay Bias and Imprecision. Clin Chem 2017; 63:585-592. [DOI: 10.1373/clinchem.2016.265058] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 09/14/2016] [Indexed: 11/06/2022]
Abstract
Abstract
BACKGROUND
Clinical outcome studies for cardiac troponins (cTn) are expensive and difficult to design owing to variation in patients, in the assays, and in the incidence of different types of myocardial infarction (MI). To overcome these difficulties, simulation models were used to estimate the rate of misclassification error for MI and risk prediction resulting from assay bias and imprecision.
METHODS
Finite mixture analysis of Abbott high-sensitivity cTnI (hs-cTnI) results at time 0 h in patients presenting early with acute coronary syndrome (ACS) symptoms to the emergency department (ED) [n = 145, Reducing the Time Interval for Identifying New Guideline (RING) study] allowed derivation of a simulation data set (n = 10000). hs-cTnI concentrations were modified by addition of bias or imprecision error. The percentage of all 10000 modified hs-cTnI results that were misclassified for MI at thresholds of 2, 5, 26.2, and 52 ng/L was determined by Monte Carlo simulation. Analyses were replicated with an all-comer emergency department (ED) population (n = 1137) ROMI (Optimum Troponin Cutoffs for ACS in the ED) study.
RESULTS
In the RING study, simulation at 26.2-ng/L (99th percentile) and 52-ng/L thresholds were affected by both bias ±2 ng/L and imprecision (10%–20%) and had misclassification rates of 0.4% to 0.6%. Simulations at the 2-ng/L and 5-ng/L thresholds were only affected by bias. Misclassification rates at bias of ±1 ng/L were 10% for the 2-ng/L threshold, and 5% for the 5-ng/L threshold.
CONCLUSIONS
Simulation models predicted that hs-cTnI results are seldom misclassified (<1% of patients) when interpretative thresholds are near or exceed the overall 99th percentile. However, simulation models also predicted that low hs-cTnI results, as recommended in guidelines, are prone to misclassification of 5%–10% of patients.
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Affiliation(s)
- Andrew W Lyon
- Department of Pathology and Laboratory Medicine, Saskatoon Health Region, Saskatoon, SK, Canada
| | | | - Oliver A S Lyon
- Department of Pathology and Laboratory Medicine, Saskatoon Health Region, Saskatoon, SK, Canada
| | - Andrew Worster
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
| | - Martha E Lyon
- Department of Pathology and Laboratory Medicine, Saskatoon Health Region, Saskatoon, SK, Canada
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The 99th percentile of reference population for cTnI and cTnT assay: methodology, pathophysiology and clinical implications. ACTA ACUST UNITED AC 2017; 55:1634-1651. [DOI: 10.1515/cclm-2016-0933] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 02/28/2017] [Indexed: 01/10/2023]
Abstract
AbstractAccording to recent international guidelines, including the 2012 Third Universal Definiton of Myocardial Infarction by the Joint ESC/ACCF/AHA/WHF Task Force, an increase in cardiac troponin (cTn) levels over the 99th percentile upper reference limit (99th URL) should be considered clinically relevant, this cut-off being measured with an imprecision ≤10 CV%. In theory 99th URL values strongly depend not only on demographic and physiological variables (i.e. criteria for considering the reference population “healthy”), but also on the analytical performance of cTn methods and mathematical algorithms used for the calculation. The aim of the present article was therefore to review the methodological and pathophysiological factors affecting the evaluation and calculation of the 99th URL for cTn assay. The critical analysis made showed that no uniform procedure is followed, and nor have experts or regulatory bodies provided uniform guidelines for researchers or cTn assays manufacturers as an aid in “their quest to define normality”. In particular, little attention has been paid to the way in which a healthy reference population is to be selected, or the criteria for calculating the 99th URL value for cTn assays, thus highlighting the need for international recommendations not only for demographic and physiological variables criteria for defining a healthy reference population, but also for calculating mathematical algorithms for establishing/calculating clinical decision values. An expert consensus group, comprising laboratory and clinical scientists, biomedical statisticians, industrial and regulatory representatives, should be responsible for drawing up these guidelines.
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Ferraro S, Dolci A, Panteghini M. Fast track protocols using highly sensitive troponin assays for ruling out and ruling in non-ST elevation acute coronary syndrome. ACTA ACUST UNITED AC 2017; 55:1683-1689. [DOI: 10.1515/cclm-2017-0044] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 02/13/2017] [Indexed: 11/15/2022]
Abstract
Abstract:The introduction of “highly sensitive” cardiac troponin assays (hsTn) has reinforced the evidence that only serial testing incorporated in running algorithms allows a more accurate diagnosis of acute myocardial infarction. In this report, we consider the available evidence supporting the use of fast track protocols for ruling out and ruling in non-ST elevation myocardial infarction (NSTEMI) and compare it with the content of recently released guideline by the European Society of Cardiology, noting some uncomfortable aspects that need urgent clarification and/or revision. Firstly, the guideline drafters have to reconsider the available evidence that does not permit to assign the same class and level of evidence to the very well-validated 0–3 h algorithm and to the 0–1 h algorithm. In agreement with the validity of available data, the limitations of fast track protocols, in particular of the 0–1 h algorithm for NSTEMI rule-in, calls for caution. Secondly, as the current diagnostics guidance by the UK National Institute for Health and Care Excellence recommends, rapid diagnostic protocols should be performed only using well-validated hsTn; recommending the use of an assay before being commercially available is not fair and scientifically sound.
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Greene DN, Tate JR. Establishing consensus-based, assay-specific 99th percentile upper reference limits to facilitate proper utilization of cardiac troponin measurements. ACTA ACUST UNITED AC 2017; 55:1675-1682. [DOI: 10.1515/cclm-2017-0067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 03/09/2017] [Indexed: 01/14/2023]
Abstract
AbstractImplementation of the 99th percentile as the upper reference limit for cardiac troponin (cTn) assays is a seemingly lucid recommendation, but, in reality, is incredibly complex. Lack of harmonization between cTn assays diminishes the ability to have a single medical decision point across manufacturer assay/instruments. Moreover, even within a single cTn assay there are several published values corresponding to the “99th percentile”. Variability in the determined value is primarily a function of population selection including: sample size, age, sex, exclusion criteria, and statistical methods. Given the complexities associated with this value, some countries have taken an expert consensus approach to endorsing harmonized, assay-specific, cTn 99th percentile values. The purpose of this manuscript is to highlight the intricacies associated with selecting a cTn 99th percentile and to review the approach that Australia used to endorse a nationwide upper reference limit for the Architect STAT hs-cTnI assay.
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