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Kavsak PA, Ahmed B, Ivanick D, Greene DN, Ranjitkar P. Patient with macrocomplexes for both creatine kinase and cardiac troponin reveals the importance of immunoassay methods for macrotroponin detection. Clin Chim Acta 2024; 562:119885. [PMID: 39038589 DOI: 10.1016/j.cca.2024.119885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/16/2024] [Accepted: 07/19/2024] [Indexed: 07/24/2024]
Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada.
| | - Basma Ahmed
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Dina N Greene
- University of Washington, Department of Laboratory Medicine and Pathology, Seattle, WA
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Kavsak PA, Ma J. Discordant High-Sensitivity Cardiac Troponin I Concentrations in the General Population. Clin Chem 2024; 70:562-564. [PMID: 38300840 DOI: 10.1093/clinchem/hvad224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Jinhui Ma
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
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Henrik Kristensen J, Amalie Wistisen Koczulab C, Anton Frandsen E, Bo Hasselbalch R, Strandkjær N, Jørgensen N, Østergaard M, Hasse Møller-Sørensen P, Christian Nilsson J, Afzal S, Rørbæk Kamstrup P, Dahl M, Bor MV, Frikke-Schmidt R, Rye Jørgensen N, Rode L, Holmvang L, Kjærgaard J, Evi Bang L, Forman J, Dalhoff K, Bundgaard H, Karmark Iversen K. Kinetics of cardiac troponin and other biomarkers in patients with ST elevation myocardial infarction. IJC HEART & VASCULATURE 2023; 48:101250. [PMID: 37602285 PMCID: PMC10432699 DOI: 10.1016/j.ijcha.2023.101250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 07/17/2023] [Indexed: 08/22/2023]
Abstract
Objective To examine changes in concentration, time-to-peak and the ensuing half-life of cardiac biomarkers in patients with myocardial infarction. Methods Blood sampling was performed every third hour within 24 h after percutaneous coronary intervention (PCI) on a cohort of patients with ST elevation myocardial infarction. Cardiac troponin (cTn) was measured by the Dimension Vista, Vitros, Atellica, and Alinity high-sensitivity (hs) cTnI assays, and the Elecsys hs-cTnT assay. Further, creatine kinase (CK), myoglobin, creatine kinase MB (CKMB) and other biomarkers were analyzed. Results A total of 36 patients completed blood sampling (median age 60 years, IQR 56.4-66.5 years; seven women, 19.4%). Hs-cTnI measured by the Vitros assay was the first hs-cTn to peak at 9.1 h (95%-CI 6.2-10.1) after PCI and 11.7 h (95%-CI 10.4-14.8) after symptoms onset. There were no notable differences between hs-cTn assays in regard to time-to-peak. Also, Vitros hs-cTnI reached the highest median ratio of concentration to upper reference level of nearly 2,000. The median half-life from peak concentration ranged from 7.6 h for myoglobin (CI 6.8-8.6) to 17.8 h for CK (CI 6.8-8.6). For hs-cTn assays the median T½ ranged from 12.4 h for the Vista hs-cTnI assay (95%-CI 11.0-14.1 h) to 17.3 h for the Elecsys hs-cTnT (95%-CI 14.9-20.8 h). Conclusions This study updates knowledge on the kinetics of cardiac biomarkers in current clinical use. There was no notable difference in trajectories, time-to-peak or half-life between hs-cTn assays.
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Affiliation(s)
- Jonas Henrik Kristensen
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Clara Amalie Wistisen Koczulab
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
| | - Emil Anton Frandsen
- Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Rasmus Bo Hasselbalch
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Nina Strandkjær
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
| | - Nicoline Jørgensen
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
| | - Morten Østergaard
- Department of Cardiothoracic Anaesthesiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Peter Hasse Møller-Sørensen
- Department of Cardiothoracic Anaesthesiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Jens Christian Nilsson
- Department of Cardiothoracic Anaesthesiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Shoaib Afzal
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Clinical Biochemistry, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
| | - Pia Rørbæk Kamstrup
- Department of Clinical Biochemistry, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
| | - Morten Dahl
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Clinical Biochemistry, Zealand University Hospital – Køge, Lykkebækvej 1, 4600 Køge, Denmark
| | - Mustafa Vakur Bor
- Department of Clinical Biochemistry, University Hospital of Southern Denmark, Finsensgade 35, 6700 Esbjerg, Denmark
| | - Ruth Frikke-Schmidt
- Department of Clinical Biochemistry, Copenhagen University Hospital – Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Niklas Rye Jørgensen
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Clinical Biochemistry, Copenhagen University Hospital – Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Line Rode
- Department of Clinical Biochemistry, Copenhagen University Hospital – Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Lene Holmvang
- Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Jesper Kjærgaard
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Lia Evi Bang
- Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Julie Forman
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen, Denmark
| | - Kim Dalhoff
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Clinical Pharmacology, Copenhagen University Hospital – Bispebjerg and Frederiksberg, Bispebjerg Bakke 23, 2400 Copenhagen, Denmark
| | - Henning Bundgaard
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
- Department of Cardiology, Copenhagen University Hospital - Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Kasper Karmark Iversen
- Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Emergency Medicine, Copenhagen University Hospital - Herlev and Gentofte, Borgmester Ib Juuls vej 1, 2730 Herlev, Denmark
- Department of Clinical Medicine, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
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Kavsak PA, Sharif S, Globe I, Ainsworth C, Ma J, McQueen M, Mehta S, Ko DT, Worster A. The Clinical Validation of a Common Analytical Change Criteria for Cardiac Troponin for Ruling in an Acute Cardiovascular Outcome in Patients Presenting with Ischemic Chest Pain Symptoms. J Cardiovasc Dev Dis 2023; 10:335. [PMID: 37623348 PMCID: PMC10455380 DOI: 10.3390/jcdd10080335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/20/2023] [Accepted: 08/01/2023] [Indexed: 08/26/2023] Open
Abstract
Serial cardiac troponin (cTn) testing on patients with symptoms suggestive of acute coronary syndrome (ACS) is primarily to identify those patients with evolving myocardial injury. With the improved analytical performance of the high-sensitivity cTn (hs-cTn) assays, different change criteria have been proposed that are mostly assay dependent. Here, we developed and compared a new Common Change Criteria (3C for the combined criteria of >3 ng/L, >30%, or >15% based on the initial cTn concentration of <10 ng/L, 10 to 100 ng/L, or >100 ng/L, respectively) method, versus the 2 h assay-dependent absolute change criteria endorsed by the European Society of Cardiology (ESC), versus the common relative >20% change criterion. These different analytical change criteria were evaluated in 855 emergency department (ED) patients with symptoms of ACS and who had two samples collected 3 h apart. The cTn concentrations were measured with four different assays (Abbott hs-cTnI, Roche hs-cTnT, Ortho cTnI-ES, and Ortho hs-cTnI). The outcomes evaluated were myocardial infarction (MI) and a composite outcome (MI, unstable angina, ventricular arrhythmia, heart failure, or cardiovascular death) within 7 days of ED presentation. The combined change criteria (3C) method yielded higher specificities (range: 93.9 to 97.2%) as compared to the >20% criterion (range: 42.3 to 88.1%) for all four assays for MI. The 3C method only yielded a higher specificity estimate for MI for the cTnI-ES assay (95.9%) versus the absolute change criteria (71.7%). Similar estimates were obtained for the composite outcome. There was also substantial agreement between hs-cTnT and the different cTnI assays for MI with the 3C method, with the percent agreement being ≥95%. The Common Change Criteria (3C) method combining both absolute and different percent changes may be used with cTnI, hs-cTnT, and different hs-cTnI assays to yield similar high-specificity (rule-in) estimates for adverse cardiovascular events for patients presenting to the ED with ACS symptoms.
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Affiliation(s)
- Peter A. Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Sameer Sharif
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Isabella Globe
- Faculty of Arts and Science, Queen’s University, Kingston, ON K7L 3N6, Canada
| | - Craig Ainsworth
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Jinhui Ma
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Matthew McQueen
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Shamir Mehta
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| | - Dennis T. Ko
- Sunnybrook Hospital, Toronto, ON M4N 3M5, Canada
| | - Andrew Worster
- Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
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Kavsak PA, Khattak S, Pogue E, Tandon V. An interference yielding divergent high-sensitivity cardiac troponin results on different instruments from the same manufacturer. Clin Chim Acta 2023; 548:117450. [PMID: 37348628 DOI: 10.1016/j.cca.2023.117450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 06/24/2023]
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McEvoy JW, Wang D, Brady T, Tang O, Ndumele C, Coresh J, Christenson RH, Selvin E. Myocardial Injury Thresholds for 4 High-Sensitivity Troponin Assays in a Population-Based Sample of US Children and Adolescents. Circulation 2023; 148:7-16. [PMID: 37078280 PMCID: PMC10330102 DOI: 10.1161/circulationaha.122.063281] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/30/2023] [Indexed: 04/21/2023]
Abstract
BACKGROUND Myocardial injury is an important pediatric diagnosis. Establishing normative data from a representative pediatric sample is vital to provide accurate upper reference limits (URLs) for defining myocardial injury using high-sensitivity cardiac troponin. METHODS Among participants 1 to 18 years of age in the 1999-2004 National Health and Nutrition Examination Survey, we measured high-sensitivity troponin T using one assay (Roche) and high-sensitivity troponin I using 3 assays (Abbott, Siemens, and Ortho). In a strictly defined healthy subgroup, we estimated 97.5th and 99th percentile URLs for each assay using the recommended nonparametric method. RESULTS Of 5695 pediatric participants, 4029 met criteria for the healthy subgroup (50% males; mean age 12.6 years). Our 99th percentile URL estimates for all 4 high-sensitivity troponin assays among children and adolescents were lower than the manufacturer-reported URLs (derived from adults). The 99th percentile URLs (95% CI) were 15 ng/L (95% CI, 12-17) for high-sensitivity troponin T, 16 ng/L (95% CI, 12-19) for high-sensitivity troponin I with the Abbott assay, 38 ng/L (95% CI, 25-46) for high-sensitivity troponin I with the Siemens assay, and 7 ng/L (95% CI, 5, 12) for high-sensitivity troponin I with the Ortho assay. The 95% CIs for age-, sex-, and race and ethnicity-specific 99th percentile URLs overlapped. However, the 97.5th percentile URL for each assay was measured with superior statistical precision (ie, tighter 95% CIs) and demonstrated differences by sex. For male compared with female children and adolescents, 97.5th percentile URLs were 11 ng/L (95% CI, 10-12) versus 6 ng/L (95% CI, 6-7) for high-sensitivity troponin T, 9 ng/L (95% CI, 7-10) versus 5 ng/L (95% CI, 4-6) for high-sensitivity troponin I with the Abbott assay, 21 ng/L (95% CI, 18-25) versus 11 ng/L (95% CI, 9-13) for high-sensitivity troponin I with the Siemens assay, and 4 ng/L (95% CI, 3-5) versus 2 ng/L (95% CI, 1-3) for high-sensitivity troponin I with the Ortho assay. In contrast to the 99th percentiles, the point estimates of 97.5th percentile pediatric URLs for high-sensitivity troponin were also much more stable to differences in the analytic approaches taken to estimate URLs. CONCLUSIONS Because myocardial infarction is rare in children and adolescents, the use of statistically more precise and reliable sex-specific 97.5th percentile high-sensitivity troponin URLs might be considered to define pediatric myocardial injury.
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Affiliation(s)
- John W. McEvoy
- Division of Cardiology and National Institute for Prevention & Cardiovascular Health, University of Galway, Ireland
- Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Dan Wang
- Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Tammy Brady
- Division of Nephrology, Department of Pediatrics, Johns Hopkins University, Baltimore, MD, USA
| | - Olive Tang
- Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Chiadi Ndumele
- Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Josef Coresh
- Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Robert H. Christenson
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Elizabeth Selvin
- Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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Kavsak PA, Belley-Cote EP, Whitlock RP, Lamy A. Cardiac troponin testing in cardiac surgery. Expert Rev Cardiovasc Ther 2023; 21:729-731. [PMID: 37947177 DOI: 10.1080/14779072.2023.2283123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/09/2023] [Indexed: 11/12/2023]
Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Emilie P Belley-Cote
- Department of Medicine, McMaster University, Hamilton, ON, Canada
- Population Health Research Institute, Hamilton, ON, Canada
| | - Richard P Whitlock
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - André Lamy
- Population Health Research Institute, Hamilton, ON, Canada
- Department of Surgery, McMaster University, Hamilton, ON, Canada
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Kavsak PA. Lot-to-lot bias for high-sensitivity cardiac troponin I concentrations ≥1000 ng/L. Clin Chem Lab Med 2023; 61:e105-e107. [PMID: 36649464 DOI: 10.1515/cclm-2023-0017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/19/2023]
Affiliation(s)
- Peter A Kavsak
- McMaster University, Hamilton, ON, Canada.,Hamilton Health Sciences, Hamilton, ON, Canada
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Kavsak PA. High-Sensitivity Cardiac Troponin Publications during the COVID-19 Pandemic (2020-2022). J Cardiovasc Dev Dis 2022; 10:jcdd10010005. [PMID: 36661900 PMCID: PMC9860561 DOI: 10.3390/jcdd10010005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
The first publications detailing the clinical utility of high-sensitivity cardiac troponin (hs-cTn) in patients with possible acute coronary syndrome (ACS) are traceable to 2009 [...].
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Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4K1, Canada
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Kavsak PA. Commentary on Macrotroponin Complex as a Cause for Cardiac Troponin Increase after COVID-19 Vaccination and Infection. Clin Chem 2022; 68:1019-1020. [PMID: 35896174 PMCID: PMC9384584 DOI: 10.1093/clinchem/hvac101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 05/27/2022] [Indexed: 12/04/2022]
Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
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Storage conditions, sample integrity, interferences, and a decision tool for investigating unusual high-sensitivity cardiac troponin results. Clin Biochem 2022; 115:67-76. [PMID: 35772501 DOI: 10.1016/j.clinbiochem.2022.06.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 05/31/2022] [Accepted: 06/22/2022] [Indexed: 11/24/2022]
Abstract
The current definition of high-sensitivity cardiac troponin (hs-cTn) assays is laboratory-based and their analytical attributes and characteristics have drawn significant attention in the literature at least partly due to the lower concentration cut-offs and changes in concentrations (i.e., deltas) employed in different algorithms and pathways to manage patient care. We propose that pre-analytical conditions such as sample type, storage conditions, and other interferences may also have a significant impact on hs-cTn concentrations and clinical management. The purpose of this literature review is to provide a summary of important pre-analytical and interference studies affecting hs-cTn concentrations. A breakdown of the literature for the major diagnostic companies providing core laboratory instrumentation (i.e., Abbott, Beckman, Ortho, Roche, and Siemens) is also provided. Finally, three cases are highlighted where knowledge of pre-analytical factors aids the hs-cTn clinically discordant investigations. This review highlights the importance of pre-analytical variables, especially storage condition, sample handling, and blood tubes used (i.e., sample type) when interpreting hs-cTn assays. Additional studies are needed to further elaborate on pre-analytical variables (i.e., centrifugation, sample type, stability) and interferences for all hs-cTn assays in clinical use, as knowledge of these variables may aid in hs-cTn clinically discordant investigations.
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Kavsak PA. Measurement in different sample types may aid in detecting interferences and macrocomplexes affecting cardiac troponin measurements. Clin Chem Lab Med 2022; 60:66-67. [PMID: 34989215 DOI: 10.1515/cclm-2021-1251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/29/2021] [Indexed: 02/07/2023]
Affiliation(s)
- Peter A Kavsak
- McMaster University, Hamilton, ON, Canada.,Hamilton Health Sciences, Hamilton, ON, Canada
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The imprecision for a high-sensitivity cardiac troponin assay and a CA 19-9 assay in samples with high C-reactive protein concentrations. Clin Chim Acta 2022; 524:192-193. [PMID: 34808114 DOI: 10.1016/j.cca.2021.11.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 11/21/2022]
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OUP accepted manuscript. Clin Chem 2022; 68:721-722. [DOI: 10.1093/clinchem/hvac026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/26/2022] [Indexed: 11/12/2022]
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Diagnostic Performance of Serial High-Sensitivity Cardiac Troponin Measurements in the Emergency Setting. J Cardiovasc Dev Dis 2021; 8:jcdd8080097. [PMID: 34436239 PMCID: PMC8397128 DOI: 10.3390/jcdd8080097] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 08/05/2021] [Accepted: 08/09/2021] [Indexed: 12/13/2022] Open
Abstract
Serial high-sensitivity cardiac troponin (hsTn) testing in the emergency department (ED) and the intensive cardiac care unit may assist physicians in ruling out or ruling in acute myocardial infarction (MI). There are three major algorithms proposed for high-sensitivity cardiac troponin I (hsTnI) using serial measurements while incorporating absolute concentration changes for MI or death following ED presentation. We sought to determine the diagnostic estimates of these three algorithms and if one was superior in two different Canadian ED patient cohorts with serial hsTnI measurements. An undifferentiated ED population (Cohort-1) and an ED population with symptoms suggestive of acute coronary syndrome (ACS; Cohort-2) were clinically managed with non-hsTn testing with the hsTnI testing performed in real-time with physicians blinded to these results (i.e., hsTnI not reported). The three algorithms evaluated were the European Society of Cardiology (ESC), the High-STEACS pathway, and the COMPASS-MI algorithm. The diagnostic estimates were derived for each algorithm for the 30-day MI/death outcome for the rule-out and rule-in arm in each cohort and compared to proposed diagnostic benchmarks (i.e., sensitivity ≥ 99.0% and specificity ≥ 90.0%) with 95% confidence intervals (CI). In Cohort-1 (n = 2966 patients, 15.3% had outcome) and Cohort-2 (n = 935 patients, 15.6% had outcome), the algorithm that obtained the highest sensitivity (97.8%; 95% CI: 96.0-98.9 and 98.6%; 95% CI: 95.1-99.8, respectively) in both cohorts was COMPASS-MI. Only Cohort-2 with both the ESC and COMPASS-MI algorithms exceeded the specificity benchmark (97.0%; 95% CI: 95.5-98.0 and 96.7%; 95% CI: 95.2-97.8, respectively). Patient selection for serial hsTnI testing will affect specificity estimates, with no algorithm achieving a sensitivity ≥ 99% for 30-day MI or death.
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Kavsak PA, Mondoux SE, Martin J, Hewitt MK, Clark L, Caruso N, Mark CT, Chetty VT, Ainsworth C, Worster A. Disagreement between Cardiac Troponin Tests Yielding a Higher Incidence of Myocardial Injury in the Emergency Setting. J Cardiovasc Dev Dis 2021; 8:31. [PMID: 33806960 PMCID: PMC8004643 DOI: 10.3390/jcdd8030031] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 12/18/2022] Open
Abstract
Differences in patient classification of myocardial injury between high-sensitivity cardiac troponin (hs-cTn) assays have largely been attributed to assay design and analytical sensitivity aspects. Our objective was to compare Ortho Clinical Diagnostics' (OCD) hs-cTnI assay to OCD's contemporary/conventional assay (cTnI ES) and another hs-cTnI assay (Abbott hs-cTnI) in samples obtained from different emergency departments (EDs). Two different sample types were evaluated (lithium heparin and ethylenediaminetetraacetic acid (EDTA) plasma) in a non-selected ED population (study 1, n = 469 samples) and in patients for which ED physicians ordered cardiac troponin testing (study 2, n = 1147 samples), from five different EDs. The incidence of injury in study 1 was higher with the OCD hs-cTnI assay (30.9%; 95% CI: 26.9 to 35.2) compared to that of the Abbott hs-cTnI (17.3%; 95% CI: 14.1 to 21.0) and the OCD cTnI ES (15.4%; 95% CI: 12.4 to 18.9) assays, with repeat testing identifying 4.8% (95% CI: 3.0 to 7.5) of the OCD hs-cTnI results with poor reproducibility. In study 2, 4.6% (95% CI: 3.5 to 6.0) of the results were not reported for the OCD hs-cTnI assay (i.e., poor reproducibility) with 12.7% (95%CI: 8.7 to 17.8) of the OCD hs-cTnI results positive for injury being negative for injury with the Abbott hs-cTnI assay. In summary, the OCD hs-cTnI assay yields higher rates of biochemical injury with a higher rate of poor reproducible results in different ED populations.
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Affiliation(s)
- Peter A. Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (J.M.); (V.T.C.)
- Hamilton Regional Laboratory Medicine Program, Juravinski Hospital, Hamilton, ON L8V 1C3, Canada; (L.C.); (N.C.); (C.-T.M.)
| | - Shawn E. Mondoux
- Division of Emergency Medicine, Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.E.M.); (M.K.H.); (A.W.)
| | - Janet Martin
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (J.M.); (V.T.C.)
| | - Mark K. Hewitt
- Division of Emergency Medicine, Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.E.M.); (M.K.H.); (A.W.)
| | - Lorna Clark
- Hamilton Regional Laboratory Medicine Program, Juravinski Hospital, Hamilton, ON L8V 1C3, Canada; (L.C.); (N.C.); (C.-T.M.)
| | - Nadia Caruso
- Hamilton Regional Laboratory Medicine Program, Juravinski Hospital, Hamilton, ON L8V 1C3, Canada; (L.C.); (N.C.); (C.-T.M.)
| | - Ching-Tong Mark
- Hamilton Regional Laboratory Medicine Program, Juravinski Hospital, Hamilton, ON L8V 1C3, Canada; (L.C.); (N.C.); (C.-T.M.)
| | - V. Tony Chetty
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (J.M.); (V.T.C.)
- Hamilton Regional Laboratory Medicine Program, Juravinski Hospital, Hamilton, ON L8V 1C3, Canada; (L.C.); (N.C.); (C.-T.M.)
| | - Craig Ainsworth
- Division of Cardiology, Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada;
| | - Andrew Worster
- Division of Emergency Medicine, Department of Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.E.M.); (M.K.H.); (A.W.)
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