1
|
CJEM Debate Series: #TropandGo - Negative high sensitivity troponin testing is safe as a final test for most emergency department patients with chest pain. CAN J EMERG MED 2021; 22:14-18. [PMID: 31965961 DOI: 10.1017/cem.2019.391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
2
|
Goel H, Melot J, Krinock MD, Kumar A, Nadar SK, Lip GYH. Heart-type fatty acid-binding protein: an overlooked cardiac biomarker. Ann Med 2020; 52:444-461. [PMID: 32697102 PMCID: PMC7877932 DOI: 10.1080/07853890.2020.1800075] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Cardiac troponins (cTn) are currently the standard of care for the diagnosis of acute coronary syndromes (ACS) in patients presenting to the emergency department (ED) with chest pain (CP). However, their plasma kinetics necessitate a prolonged ED stay or overnight hospital admission, especially in those presenting early after CP onset. Moreover, ruling out ACS in low-risk patients requires prolonged ED observation or overnight hospital admission to allow serial measurements of c-Tn, adding cost. Heart-type fatty acid-binding protein (H-FABP) is a novel marker of myocardial injury with putative advantages over cTn. Being present in abundance in the myocellular cytoplasm, it is released rapidly (<1 h) after the onset of myocardial injury and could potentially play an important role in both earlier diagnosis of high-risk patients presenting early after CP onset, as well as in risk-stratifying low-risk patients rapidly. Like cTn, H-FABP also has a potential role as a prognostic marker in other conditions where the myocardial injury occurs, such as acute congestive heart failure (CHF) and acute pulmonary embolism (PE). This review provides an overview of the evidence examining the role of H-FABP in early diagnosis and risk stratification of patients with CP and in non-ACS conditions associated with myocardial injury. Key messages Heart-type fatty acid-binding protein is a biomarker that is elevated early in myocardial injury The routine use in the emergency department complements the use of troponins in ruling out acute coronary syndromes in patients presenting early with chest pain It also is useful in risk stratifying patients with other conditions such as heart failure and acute pulmonary embolism.
Collapse
Affiliation(s)
- Harsh Goel
- Department of Medicine, St. Luke's University Hospital, Bethlehem, PA, USA.,Luis Katz School of Medicine, Temple University, Philadelphia, USA
| | - Joshua Melot
- Department of Medicine, St. Luke's University Hospital, Bethlehem, PA, USA
| | - Matthew D Krinock
- Department of Medicine, St. Luke's University Hospital, Bethlehem, PA, USA
| | - Ashish Kumar
- Department of Medicine, Wellspan York Hospital, York, PA, USA
| | - Sunil K Nadar
- Department of Medicine, Sultan Qaboos University, Muscat, Oman
| | - Gregory Y H Lip
- Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart & Chest Hospital, Liverpool, UK.,Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
| |
Collapse
|
3
|
Fabbri A, Bachetti C, Ottani F, Morelli A, Benazzi B, Spiezia S, Cortigiani M, Dorizzi R, Jaffe AS, Galvani M. Rapid rule-out of suspected acute coronary syndrome in the Emergency Department by high-sensitivity cardiac troponin T levels at presentation. Intern Emerg Med 2019; 14:403-410. [PMID: 30499074 DOI: 10.1007/s11739-018-1996-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 11/22/2018] [Indexed: 12/22/2022]
Abstract
The reliability of initial high-sensitivity cardiac troponin T (hs-cTnT) under limit-of-detection in ruling-out short- and long-term acute coronary events in subjects for suspected non-ST-segment elevation acute coronary syndrome (NSTE-ACS) is not definitely settled. In a retrospective chart review analysis, 1001 subjects with hs-cTnT ≤ 14 ng/L out of 4053 subjects with hs-cTnT measured at Emergency Department (ED) presentation were recruited. The main outcome measure is fatal or non-fatal myocardial infarction (MI) within 30 days; secondary outcomes are MI or major acute coronary events (MACE) as a combination of MI or re-hospitalization for unstable angina within 1 year. In subjects with hs-cTnT < 5 ng/L [32.6% of cases, mean age 63 years (interquartile range 23)], no cases (0%, NPV 100%) had MI within 30 days, 2 cases (0.6%, NPV 99.4%) MI at 1-year, and 11 cases (3.4%, NPV 96.6%) MACE at 1-year. Patients with hs-cTnT < 5 ng/L would have benefited from a shortened decision (9.30 h and 53% overnight ED stay saved). Hs-cTnT < 5 ng/L is confirmed as safe for patients and comfortable for physicians in ruling out MI or MACE both at short and long term, suggesting that a sizable number of patients can be rapidly discharged without unnecessary diagnostic tests and ED observation.
Collapse
Affiliation(s)
- Andrea Fabbri
- Dipartimento Emergenza, Presidio Ospedaliero Morgagni-Pierantoni, Azienda USL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy.
| | - Cristina Bachetti
- Dipartimento Cardio-vascolare, Presidio Ospedaliero Morgagni-Pierantoni, AUSL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
| | - Filippo Ottani
- Dipartimento Cardio-vascolare, Presidio Ospedaliero Morgagni-Pierantoni, AUSL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
- Cardiovascular Research Unit, Fondazione Cardiologica Sacco, 47121, Forlì, FC, Italy
| | - Alice Morelli
- Dipartimento Emergenza, Presidio Ospedaliero Morgagni-Pierantoni, Azienda USL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
| | - Barbara Benazzi
- Dipartimento Emergenza, Presidio Ospedaliero Morgagni-Pierantoni, Azienda USL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
| | - Sergio Spiezia
- Dipartimento Emergenza, Presidio Ospedaliero Morgagni-Pierantoni, Azienda USL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
| | - Marco Cortigiani
- Dipartimento Emergenza, Presidio Ospedaliero Morgagni-Pierantoni, Azienda USL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
| | - Romolo Dorizzi
- Laboratorio Unico AUSL della Romagna, Piazzale della Liberazione 60, Pievesestina di Cesena, FC, Italy
| | - Allan S Jaffe
- Cardiovascular Department and Department of Laboratory Medicine and Pathology, Mayo Clinic and Medical School, 200 First St. SW, Rochester, MN, 55905, USA
| | - Marcello Galvani
- Dipartimento Cardio-vascolare, Presidio Ospedaliero Morgagni-Pierantoni, AUSL della Romagna, Via C Forlanini 34, 47121, Forlì, FC, Italy
- Cardiovascular Research Unit, Fondazione Cardiologica Sacco, 47121, Forlì, FC, Italy
| |
Collapse
|
4
|
Steinberg A, Callaway CW, Arnold RM, Cronberg T, Naito H, Dadon K, Chae MK, Elmer J. Prognostication after cardiac arrest: Results of an international, multi-professional survey. Resuscitation 2019; 138:190-197. [PMID: 30902688 DOI: 10.1016/j.resuscitation.2019.03.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/04/2019] [Accepted: 03/11/2019] [Indexed: 01/14/2023]
Abstract
AIM We explored preferences for prognostic test performance characteristics and error tolerance in decisions regarding withdrawal or continuation of life-sustaining therapy (LST) after cardiac arrest in a diverse cohort of medical providers. METHODOLOGY We distributed a survey through professional societies and research networks. We asked demographic characteristics, preferences for prognostic test performance characteristics and views on acceptable false positive rates for decisions about LST after cardiac arrest. RESULTS Overall, 640 respondents participated in our survey. Most respondents were attending physicians (74%) with >10 years of experience (59%) and practiced at academic centers (77%). Common specialties were neurology (22%), neuro- or general critical care (24%) and palliative care (31%). The majority (56%) felt an acceptable FPR for withdrawal of LST from patients who might otherwise have recovered was ≤0.1%. Acceptable FPRs for continuing LST in patients with unrecognized irrecoverable injury was higher, with 59% choosing a threshold ≤1%. Compared to providers with >10 years of experience, those with <5 years thought lower FPRs were acceptable (P < 0.001 for both). Palliative care providers accepted significantly higher FPRs for withdrawal of LST (P < 0.0001), and critical care providers accepted significantly higher FPRs for provision of long-term LST (P = 0.02). With regard to test performance characteristics, providers favored accuracy over timeliness, and prefer tests be optimized to predictrather than favorable outcomes. CONCLUSION Medical providers are comfortable with low acceptable FPR for withdrawal (≤0.1%) and continuation (≤1%) of LST after cardiac arrest. These FPRs may be lower than can be achieved with current prognostic modalities.
Collapse
Affiliation(s)
- Alexis Steinberg
- Department of Critical Care Medicine, Univsersity of Pittsburgh, Pittsburgh, PA, United States; Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Clifton W Callaway
- Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Robert M Arnold
- Department of Medicine, Section of Palliative Care and Medical Ethics, University of Pittsburgh, Pittsburgh, PA, United States
| | - Tobias Cronberg
- Department of Clinical Sciences, Neurology, Lund University, Skane University Hospital, Lund, Sweden
| | - Hiromichi Naito
- Department of Emergency, Critical Care, and Disaster Medicine, Okayama University, Okayama, Japan
| | - Koral Dadon
- Technion Israel Institute of Technology, Haifa, Israel
| | - Minjung Kathy Chae
- Department of Emergency Medicine, Ajou University Medical Center, Republic of Korea
| | - Jonathan Elmer
- Department of Critical Care Medicine, Univsersity of Pittsburgh, Pittsburgh, PA, United States; Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA, United States; Department of Neurology, University of Pittsburgh, Pittsburgh, PA, United States.
| |
Collapse
|
5
|
Sex-specific, high-sensitivity cardiac troponin T cut-off concentrations for ruling out acute myocardial infarction with a single measurement. CAN J EMERG MED 2018; 21:26-33. [PMID: 30261938 DOI: 10.1017/cem.2018.435] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Sex-specific diagnostic cut-offs may improve the test characteristics of high-sensitivity troponin assays for the diagnosis of myocardial infarction (MI). The objective of this study was to quantify test characteristics of sex-specific cut-offs of a single, high-sensitivity cardiac troponin T (hs-cTnT) assay for 7-day MI in patients with chest pain. METHODS This observational cohort study included consecutive emergency department (ED) patients with suspected cardiac chest pain from four Canadian EDs who had an hs-cTnT assay performed within 60 minutes of ED arrival. The primary outcome was MI at 7 days. We quantified test characteristics (sensitivity, negative predictive value [NPV], likelihood ratios and proportion of patients ruled out) for multiple combinations of sex-specific, rule-out cut-offs. We calculated the net reclassification index compared to universal rule-out cut-offs. RESULTS In 7,130 patients (3,931 men and 3,199 women), the 7-day MI incidence was 7.38% among men and 3.78% among women. Optimal sex-specific cut-offs (<8 ng/L for men and <7 ng/L for women) had a 98.5% sensitivity for MI and ruled out MI in 55.8% of patients. This would enable an absolute increase in the proportion of patients who were able to be ruled out with a single hs-cTnT of 13.2% to 22.2%, depending on the universal rule-out concentration used as a comparator. CONCLUSIONS Sex-specific hs-cTnT cut-offs for ruling out MI at ED arrival may improve classification performance, enabling more patients to be safely ruled out at ED arrival. However, differences between sex-specific and universal cut-off concentrations are within the variation of the assay, limiting the clinical utility of this approach. These findings should be confirmed in other data sets.
Collapse
|
6
|
McRae AD, Innes G, Graham M, Lang E, Andruchow JE, Ji Y, Vatanpour S, Abedin T, Yang H, Southern DA, Wang D, Seiden‐Long I, DeKoning L, Kavsak P. Undetectable Concentrations of a Food and Drug Administration-approved High-sensitivity Cardiac Troponin T Assay to Rule Out Acute Myocardial Infarction at Emergency Department Arrival. Acad Emerg Med 2017; 24:1267-1277. [PMID: 28544100 PMCID: PMC5656889 DOI: 10.1111/acem.13229] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/09/2017] [Accepted: 05/15/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND The objective of this study was to quantify the sensitivity of very low concentrations of high-sensitivity cardiac troponin T (hsTnT) at ED arrival for acute myocardial infarction (AMI) in a large cohort of chest pain patients evaluated in real-world clinical practice. METHODS This retrospective study included consecutive ED patients with suspected cardiac chest pain evaluated in four urban EDs, excluding those with ST-elevation AMI, cardiac arrest or abnormal kidney function. The primary outcomes were AMI at 7, 30, and 90 days. Secondary outcomes included major adverse cardiac events (MACE; all-cause mortality, AMI, and revascularization) and the individual MACE components. Test characteristics were calculated for hsTnT values from 3 to 200 ng/L . RESULTS A total of 7,130 patients met inclusion criteria. AMI incidences at 7, 30, and 90 days were 5.8, 6.0, and 6.2%. When the hsTnT assay was performed at ED arrival, the limit of blank of the assay (3 ng/L) ruled out 7-day AMI in 15.5% of patients with 100% sensitivity and negative predictive value (NPV). The limit of detection of the assay (5 ng/L) ruled out AMI in 33.6% of patients with 99.8% sensitivity and 99.95% NPV for 7-day AMI. The limit of quantification (the Food and Drug Administration [FDA]-approved cutoff for lower the reportable limit) of 6 ng/L ruled out AMI in 42.2% of patients with 99.8% sensitivity and 99.95% NPV. The sensitivities of the cutoffs of <3, <5, and <6 ng/L for 7-day MACE were 99.6, 97.4, and 96.6%, respectively. The NPVs of the cutoffs of <3, <5, and <6 ng/L for 7-day MACE were 99.8, 99.5, and 99.4%, respectively. A secondary analysis was performed in a subgroup of 3,549 higher-risk patients who underwent serial troponin testing. In this subgroup, a cutoff of 3 ng/L ruled out 7-day AMI in 9.6% of patients with 100% sensitivity and NPV, a cutoff of 5 ng/L ruled out 7-day AMI in 23.3% of patients with 99.7% sensitivity and 99.9% NPV, and a cutoff of 6 ng/L ruled out 7-day AMI in 29.8% of patients with 99.7 and 99.9% NPV. In the higher-risk subgroup, the sensitivities of cutoffs of <3, <5, and <6 ng/L for 7-day MACE were 99.8, 97.4, and 96.6%, respectively. In this higher-risk subgroup, the NPV of cutoffs of <3, <5, and <6 ng/L for 7-day MACE were 99.7, 98.5, and 98.4%, respectively. CONCLUSIONS When used in real-world clinical practice conditions, hsTnT concentrations < 6 ng/L (below the lower reportable limit for an FDA-approved assay) at the time of ED arrival can rule out AMI with very high sensitivity and NPV. The sensitivity for MACE is unacceptably low, and thus a single-troponin rule-out strategy should only be used in the context of a structured risk evaluation.
Collapse
Affiliation(s)
- Andrew D. McRae
- Department of Emergency MedicineUniversity of CalgaryCalgaryAlberta
- Department of Community Health SciencesUniversity of CalgaryCalgaryAlberta
| | - Grant Innes
- Department of Emergency MedicineUniversity of CalgaryCalgaryAlberta
- Department of Community Health SciencesUniversity of CalgaryCalgaryAlberta
| | - Michelle Graham
- Department of CardiologyUniversity of AlbertaEdmontonAlberta
| | - Eddy Lang
- Department of Emergency MedicineUniversity of CalgaryCalgaryAlberta
- Department of Community Health SciencesUniversity of CalgaryCalgaryAlberta
| | | | - Yunqi Ji
- Alberta Health ServicesCalgaryAlberta
| | | | | | - Hong Yang
- Department of Community Health SciencesUniversity of CalgaryCalgaryAlberta
| | | | | | | | | | - Peter Kavsak
- Department of Pathology and Molecular MedicineMcMaster UniversityHamiltonOntarioCanada
| |
Collapse
|
7
|
McRae AD, Innes G, Graham M, Lang E, Andruchow JE, Yang H, Ji Y, Vatanpour S, Southern DA, Wang D, Seiden-Long I, DeKoning L, Kavsak P. Comparative Evaluation of 2-Hour Rapid Diagnostic Algorithms for Acute Myocardial Infarction Using High-Sensitivity Cardiac Troponin T. Can J Cardiol 2017; 33:1006-1012. [PMID: 28669701 DOI: 10.1016/j.cjca.2017.04.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 04/27/2017] [Accepted: 04/27/2017] [Indexed: 10/19/2022] Open
Abstract
BACKGROUND Symptoms of acute coronary syndrome account for a large proportion of emergency department (ED) visits and hospitalizations. High-sensitivity troponin can rapidly rule out or rule in acute myocardial infarction (AMI) within a short time of ED arrival. We sought to validate test characteristics and classification performance of 2-hour high-sensitivity troponin T (hsTnT) algorithms for the rapid diagnosis of AMI. METHODS We included consecutive patients from 4 academic EDs with suspected cardiac chest pain who had hsTnT assays performed 2 hours apart (± 30 minutes) as part of routine care. The primary outcome was AMI at 7 days. Secondary outcomes included major adverse cardiac events (mortality, AMI, and revascularization). Test characteristics and classification performance for multiple 2-hour algorithms were quantified. RESULTS Seven hundred twenty-two patients met inclusion criteria. Seven-day AMI incidence was 10.9% and major adverse cardiac event incidence was 13.7%. A 2-hour rule-out algorithm proposed by Reichlin and colleagues ruled out AMI in 59.4% of patients with 98.7% sensitivity and 99.8% negative predictive value (NPV). The 2-hour rule-out algorithm proposed by the United Kingdom National Institute for Health and Care Excellence ruled out AMI in 50.3% of patients with similar sensitivity and NPV. Other exploratory algorithms had similar sensitivity but marginally better classification performance. According to Reichlin et al., the 2-hour rule-in algorithm ruled in AMI in 16.5% of patients with 92.4% specificity and 58.5% positive predictive value. CONCLUSIONS Two-hour hsTnT algorithms can rule out AMI with very high sensitivity and NPV. The algorithm developed by Reichlin et al. had superior classification performance. Reichlin and colleagues' 2-hour rule-in algorithm had poor positive predictive value and might not be suitable for early rule-in decision-making.
Collapse
Affiliation(s)
- Andrew D McRae
- Department of Emergency Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada.
| | - Grant Innes
- Department of Emergency Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Michelle Graham
- Department of Cardiology, University of Alberta, Edmonton, Alberta, Canada
| | - Eddy Lang
- Department of Emergency Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - James E Andruchow
- Department of Emergency Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Hong Yang
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Yunqi Ji
- Alberta Health Services, Calgary, Alberta, Canada
| | - Shabnam Vatanpour
- Department of Emergency Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Danielle A Southern
- Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Dongmei Wang
- Alberta Health Services, Calgary, Alberta, Canada
| | | | | | - Peter Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| |
Collapse
|
8
|
Shortt C, Ma J, Clayton N, Sherbino J, Whitlock R, Pare G, Hill SA, McQueen M, Mehta SR, Devereaux PJ, Worster A, Kavsak PA. Rule-In and Rule-Out of Myocardial Infarction Using Cardiac Troponin and Glycemic Biomarkers in Patients with Symptoms Suggestive of Acute Coronary Syndrome. Clin Chem 2016; 63:403-414. [PMID: 28062631 DOI: 10.1373/clinchem.2016.261545] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 08/23/2016] [Indexed: 01/31/2023]
Abstract
BACKGROUND Early rule-in/rule-out of myocardial infarction (MI) in patients presenting to the emergency department (ED) is important for patient care and resource allocation. Given that dysglycemia is a strong risk factor for MI, we sought to explore and compare different combinations of cardiac troponin (cTn) cutoffs with glycemic markers for the early rule-in/rule-out of MI. METHODS We included ED patients (n = 1137) with symptoms suggestive of acute coronary syndrome (ACS) who had cTnI, high-sensitivity cTnI (hs-cTnI), hs-cTnT, glucose, and hemoglobin A1c (Hb A1c) measurements. We derived rule-in/rule-out algorithms using different combinations of ROC-derived and literature cutoffs for rule-in and rule-out of MI within 7 days after presentation. These algorithms were then tested for MI/cardiovascular death and ACS/cardiovascular death at 7 days. ROC curves, sensitivity, specificity, likelihood ratios, positive and negative predictive values (PPV and NPV), and CIs were determined for various biomarker combinations. RESULTS MI was diagnosed in 133 patients (11.7%; 95% CI, 9.8-13.8). The algorithms that included cTn and glucose produced the greatest number of patients ruled out/ruled in for MI and yielded sensitivity ≥99%, NPV ≥99.5%, specificity ≥99%, and PPV ≥80%. This diagnostic performance was maintained for MI/cardiovascular death but not for ACS/cardiovascular death. The addition of hemoglobin A1c (Hb A1c) (≥6.5%) to these algorithms did not change these estimates; however, 50 patients with previously unknown diabetes may have been identified if Hb A1c was measured. CONCLUSIONS Algorithms incorporating glucose with cTn may lead to an earlier MI diagnosis and rule-out for MI/cardiovascular death. Addition of Hb A1c into these algorithms allows for identification of diabetes. Future studies extending these findings are needed for ACS/cardiovascular death. ClinicalTrials.gov identifier: NCT01994577.
Collapse
Affiliation(s)
- Colleen Shortt
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Jinhui Ma
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, ON, Canada; and the Children's Hospital of Eastern Ontario Research Institute, ON, Canada
| | - Natasha Clayton
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Jonathan Sherbino
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
| | - Richard Whitlock
- Division of Cardiac Surgery, and Population Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - Guillaume Pare
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Stephen A Hill
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Matthew McQueen
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Shamir R Mehta
- Division of Cardiology, and Population Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - P J Devereaux
- Division of Cardiology, and Population Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - Andrew Worster
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
| | - Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada;
| |
Collapse
|
9
|
Validation of the new Vancouver Chest Pain Rule in Asian chest pain patients presenting at the emergency department. CAN J EMERG MED 2016; 19:18-25. [DOI: 10.1017/cem.2016.336] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractObjectivesThe new Vancouver Chest Pain (VCP) Rule recommends early discharge for chest pain patients who are at low risk of developing acute coronary syndrome (ACS), and thus can be discharged within 2 hours of arrival at the emergency department (ED). This study aimed to assess the performance of the new VCP Rule for Asian patients presenting with chest pain at the ED.MethodsThis prospective cohort study involved patients attended to at the ED of a large urban centre. Patients of at least 25 years old, presenting with stable chest pain and a non-diagnostic ECG, and with no history of active coronary artery disease were included in the study. The main outcome measures were cardiac events, angioplasty, or coronary artery bypass within 30 days of enrolment.ResultsThe study included 1690 patients from 27 August 2000 to 1 May 2002, with 661 patients fulfilling the VCP criteria. Of those for early discharge, 24 had cardiac events and 13 had angioplasty or bypass at 30 days, compared to 91 and 41, respectively, for those unsuitable for discharge. This gave the rule a sensitivity of 78.1% for cardiac events, including angioplasty and bypass. Specificity was 41.0%, and negative predictive value (NPV) was 94.4%.ConclusionWe found the new VCP Rule to have moderate sensitivity and poor specificity for adverse cardiac events in our population. With an NPV of less than 100%, this means that a small proportion of patients sent home with early discharge would still have adverse cardiac events.
Collapse
|
10
|
Boubaker H, Beltaief K, Grissa MH, Kerkeni W, Dridi Z, Msolli MA, Chouchène H, Belaïd A, Chouchène H, Sassi M, Bouida W, Boukef R, Methemmem M, Marghli S, Nouira S. Inaccuracy of Thrombolysis in Myocardial Infarction and Global Registry in Acute Coronary Events scores in predicting outcome in ED patients with potential ischemic chest pain. Am J Emerg Med 2015; 33:1209-12. [DOI: 10.1016/j.ajem.2015.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/23/2015] [Accepted: 05/20/2015] [Indexed: 10/23/2022] Open
|
11
|
Scheuermeyer FX, Wong H, Yu E, Boychuk B, Innes G, Grafstein E, Gin K, Christenson J. Development and validation of a prediction rule for early discharge of low-risk emergency department patients with potential ischemic chest pain. CAN J EMERG MED 2015; 16:106-19. [DOI: 10.2310/8000.2013.130938] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
ABSTRACTObjectives:Current guidelines emphasize that emergency department (ED) patients at low risk for potential ischemic chest pain cannot be discharged without extensive investigations or hospitalization to minimize the risk of missing acute coronary syndrome (ACS). We sought to derive and validate a prediction rule that permitted 20 to 30% of ED patients without ACS safely to be discharged within 2 hours without further provocative cardiac testing.Methods:This prospective cohort study enrolled 1,669 chest pain patients in two blocks in 2000–2003 (development cohort) and 2006 (validation cohort). The primary outcome was 30-day ACS diagnosis. A recursive partitioning model incorporated reliable and predictive cardiac risk factors, pain characteristics, electrocardiographic findings, and cardiac biomarker results.Results:In the derivation cohort, 165 of 763 patients (21.6%) had a 30-day ACS diagnosis. The derived prediction rule was 100.0% sensitive and 18.6% specific. In the validation cohort, 119 of 906 patients (13.1%) had ACS, and the prediction rule was 99.2% sensitive (95% CI 95.4–100.0) and 23.4% specific (95% CI 20.6–26.5). Patients have a very low ACS risk if arrival and 2-hour troponin levels are normal, the initial electrocardiogram is nonischemic, there is no history of ACS or nitrate use, age is < 50 years, and defined pain characteristics are met. The validation of the rule was limited by the lack of consistency in data capture, incomplete follow-up, and lack of evaluation of the accuracy, comfort, and clinical sensibility of this clinical decision rule.Conclusion:The Vancouver Chest Pain Rule may identify a cohort of ED chest pain patients who can be safely discharged within 2 hours without provocative cardiac testing. Further validation across other centres with consistent application and comprehensive and uniform follow-up of all eligible and enrolled patients, in addition to measuring and reporting the accuracy of and comfort level with applying the rule and the clinical sensibility, should be completed prior to adoption and implementation.
Collapse
|
12
|
Zimmerli L, Steurer J, Kofmehl R, Wertli MM, Held U. Validation of a diagnostic probability function for estimating probabilities of acute coronary syndrome. BMC Emerg Med 2014; 14:23. [PMID: 25403233 PMCID: PMC4289321 DOI: 10.1186/1471-227x-14-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 10/29/2014] [Indexed: 11/25/2022] Open
Abstract
Background We recently reported about the derivation of a diagnostic probability function for acute coronary syndrome (ACS). The present study aims to validate the probability function as a rule-out criterion in a new sample of patients. Methods 186 patients presenting with chest pain and/or dyspnea at one of the three participating hospitals’ emergency rooms in Switzerland were included in the study. In these patients, information on a set of pre-specified variables was collected and a predicted probability of ACS was calculated for each patient. Approximately two weeks after the initial visit in the emergency room, patients were contacted by phone to assess whether a diagnosis of ACS was established. Results Of the 186 patients included in the study, 31 (17%) had an acute coronary syndrome. A risk probability for ACS below 2% was considered a rule-out criterion for ACS, leading to a sensitivity of 87% and a specificity of 17% of the rule. The characteristics of the study patients were compared to the cases from which the probability function was derived, and considerable deviations were found in some of the variables. Conclusions The proposed probability function, with a 2% cut-off for ruling out ACS works quite well if the patient data lie within the ranges of values of the original vignettes. If the observations deviate too much from these ranges, the predicted probabilities for ACS should be seen with caution. Electronic supplementary material The online version of this article (doi:10.1186/1471-227X-14-23) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
| | | | | | | | - Ulrike Held
- Horten Centre for Patient Oriented-Research and Knowledge Transfer, University of Zurich, Pestalozzistrasse 24, Zurich 8091, Switzerland.
| |
Collapse
|
13
|
Taylor BT, Mancini M. Discrepancy between clinician and research assistant in TIMI score calculation (TRIAGED CPU). West J Emerg Med 2014; 16:24-33. [PMID: 25671004 PMCID: PMC4307721 DOI: 10.5811/westjem.2014.9.21685] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 07/28/2014] [Accepted: 09/04/2014] [Indexed: 12/02/2022] Open
Abstract
Introduction Several studies have attempted to demonstrate that the Thrombolysis in Myocardial Infarction (TIMI) risk score has the ability to risk stratify emergency department (ED) patients with potential acute coronary syndromes (ACS). Most of the studies we reviewed relied on trained research investigators to determine TIMI risk scores rather than ED providers functioning in their normal work capacity. We assessed whether TIMI risk scores obtained by ED providers in the setting of a busy ED differed from those obtained by trained research investigators. Methods This was an ED-based prospective observational cohort study comparing TIMI scores obtained by 49 ED providers admitting patients to an ED chest pain unit (CPU) to scores generated by a team of trained research investigators. We examined provider type, patient gender, and TIMI elements for their effects on TIMI risk score discrepancy. Results Of the 501 adult patients enrolled in the study, 29.3% of TIMI risk scores determined by ED providers and trained research investigators were generated using identical TIMI risk score variables. In our low-risk population the majority of TIMI risk score differences were small; however, 12% of TIMI risk scores differed by two or more points. Conclusion TIMI risk scores determined by ED providers in the setting of a busy ED frequently differ from scores generated by trained research investigators who complete them while not under the same pressure of an ED provider.
Collapse
Affiliation(s)
- Brian T Taylor
- Lakeland HealthCare, Department of Emergency Medicine, St. Joseph MI, Department of Emergency Medicine, Saint Joseph, Michigan
| | - Michelino Mancini
- Lakeland HealthCare, Department of Emergency Medicine, St. Joseph MI, Department of Emergency Medicine, Saint Joseph, Michigan
| |
Collapse
|
14
|
Body R, McDowell G, Carley S, Wibberley C, Ferguson J, Mackway-Jones K. A FABP-ulous ‘rule out’ strategy? Heart fatty acid binding protein and troponin for rapid exclusion of acute myocardial infarction. Resuscitation 2011; 82:1041-6. [DOI: 10.1016/j.resuscitation.2011.03.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 03/10/2011] [Accepted: 03/15/2011] [Indexed: 12/30/2022]
|
15
|
Body R, Pemberton P, Ali F, McDowell G, Carley S, Smith A, Mackway-Jones K. Low soluble P-selectin may facilitate early exclusion of acute myocardial infarction. Clin Chim Acta 2011; 412:614-8. [PMID: 21167826 DOI: 10.1016/j.cca.2010.12.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 12/07/2010] [Accepted: 12/09/2010] [Indexed: 10/18/2022]
|
16
|
Brown TB, Cofield SS, Iyer A, Lai R, Milteer H, Queen B, Schwab MH, Menchine M, Schriger DL. Assessment of Risk Tolerance for Adverse Events in Emergency Department Chest Pain Patients: A Pilot Study. J Emerg Med 2010; 39:247-52. [DOI: 10.1016/j.jemermed.2009.03.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 02/10/2009] [Accepted: 03/26/2009] [Indexed: 10/20/2022]
|
17
|
Gencer B, Vaucher P, Herzig L, Verdon F, Ruffieux C, Bösner S, Burnand B, Bischoff T, Donner-Banzhoff N, Favrat B. Ruling out coronary heart disease in primary care patients with chest pain: a clinical prediction score. BMC Med 2010; 8:9. [PMID: 20092615 PMCID: PMC2832616 DOI: 10.1186/1741-7015-8-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2009] [Accepted: 01/21/2010] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Chest pain raises concern for the possibility of coronary heart disease. Scoring methods have been developed to identify coronary heart disease in emergency settings, but not in primary care. METHODS Data were collected from a multicenter Swiss clinical cohort study including 672 consecutive patients with chest pain, who had visited one of 59 family practitioners' offices. Using delayed diagnosis we derived a prediction rule to rule out coronary heart disease by means of a logistic regression model. Known cardiovascular risk factors, pain characteristics, and physical signs associated with coronary heart disease were explored to develop a clinical score. Patients diagnosed with angina or acute myocardial infarction within the year following their initial visit comprised the coronary heart disease group. RESULTS The coronary heart disease score was derived from eight variables: age, gender, duration of chest pain from 1 to 60 minutes, substernal chest pain location, pain increasing with exertion, absence of tenderness point at palpation, cardiovascular risks factors, and personal history of cardiovascular disease. Area under the receiver operating characteristics curve was of 0.95 with a 95% confidence interval of 0.92; 0.97. From this score, 413 patients were considered as low risk for values of percentile 5 of the coronary heart disease patients. Internal validity was confirmed by bootstrapping. External validation using data from a German cohort (Marburg, n = 774) revealed a receiver operating characteristics curve of 0.75 (95% confidence interval, 0.72; 0.81) with a sensitivity of 85.6% and a specificity of 47.2%. CONCLUSIONS This score, based only on history and physical examination, is a complementary tool for ruling out coronary heart disease in primary care patients complaining of chest pain.
Collapse
Affiliation(s)
- Baris Gencer
- Department of Ambulatory Care and Community Medicine, University of Lausanne, Switzerland.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Diagnostic accuracy of clinical prediction rules to exclude acute coronary syndrome in the emergency department setting: a systematic review. CAN J EMERG MED 2008; 10:373-82. [PMID: 18652730 DOI: 10.1017/s148180350001040x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE We sought to determine the diagnostic accuracy of clinical prediction rules to exclude acute coronary syndrome (ACS) in the emergency department (ED) setting. METHODS We searched MEDLINE, EMBASE, Web of Science and the Cochrane Database of Systematic Reviews. We contacted content experts to identify additional articles for review. Reference lists of included studies were hand searched. We selected articles for review based on the following criteria: 1) enrolled consecutive ED patients; 2) incorporated variables from the history or physical examination, electrocardiogram and cardiac biomarkers; 3) did not incorporate cardiac stress testing or coronary angiography into prediction rule; 4) based on original research; 5) prospectively derived or validated; 6) did not require use of a computer; and 7) reported sufficient data to construct a 2 x 2 contingency table. We assessed study quality and extracted data independently and in duplicate using a standardized data extraction form. RESULTS Eight studies met inclusion criteria, encompassing 7937 patients. None of the studies verified the prediction rule with a reference standard on all or a random sample of patients. Six studies did not report blinding prediction rule assessors to reference standard results, and vice versa. Three prediction rules were prospectively validated. Sensitivities and specificities ranged from 94% to 100% and 13% to 57%, and positive and negative likelihood ratios from 1.1 to 2.2 and 0.01 to 0.17, respectively. CONCLUSION Current prediction rules for ACS have substantial methodological limitations and have not been successfully implemented in the clinical setting. Future methodologically sound studies are needed to guide clinical practice.
Collapse
|
19
|
Hess EP, Wells GA, Jaffe A, Stiell IG. A study to derive a clinical decision rule for triage of emergency department patients with chest pain: design and methodology. BMC Emerg Med 2008; 8:3. [PMID: 18254973 PMCID: PMC2275746 DOI: 10.1186/1471-227x-8-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Accepted: 02/06/2008] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Chest pain is the second most common chief complaint in North American emergency departments. Data from the U.S. suggest that 2.1% of patients with acute myocardial infarction and 2.3% of patients with unstable angina are misdiagnosed, with slightly higher rates reported in a recent Canadian study (4.6% and 6.4%, respectively). Information obtained from the history, 12-lead ECG, and a single set of cardiac enzymes is unable to identify patients who are safe for early discharge with sufficient sensitivity. The 2007 ACC/AHA guidelines for UA/NSTEMI do not identify patients at low risk for adverse cardiac events who can be safely discharged without provocative testing. As a result large numbers of low risk patients are triaged to chest pain observation units and undergo provocative testing, at significant cost to the healthcare system. Clinical decision rules use clinical findings (history, physical exam, test results) to suggest a diagnostic or therapeutic course of action. Currently no methodologically robust clinical decision rule identifies patients safe for early discharge. METHODS/DESIGN The goal of this study is to derive a clinical decision rule which will allow emergency physicians to accurately identify patients with chest pain who are safe for early discharge. The study will utilize a prospective cohort design. Standardized clinical variables will be collected on all patients at least 25 years of age complaining of chest pain prior to provocative testing. Variables strongly associated with the composite outcome acute myocardial infarction, revascularization, or death will be further analyzed with multivariable analysis to derive the clinical rule. Specific aims are to: i) apply standardized clinical assessments to patients with chest pain, incorporating results of early cardiac testing; ii) determine the inter-observer reliability of the clinical information; iii) determine the statistical association between the clinical findings and the composite outcome; and iv) use multivariable analysis to derive a highly sensitive clinical decision rule to guide triage decisions. DISCUSSION The study will derive a highly sensitive clinical decision rule to identify low risk patients safe for early discharge. This will improve patient care, lower healthcare costs, and enhance flow in our busy and overcrowded emergency departments.
Collapse
Affiliation(s)
- Erik P Hess
- Department of Emergency Medicine, University of Ottawa, Ottawa, Canada
| | - George A Wells
- Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada
| | - Allan Jaffe
- Department of Internal Medicine, Division of Cardiology, Mayo Clinic College of Medicine, Rochester, USA
| | - Ian G Stiell
- Department of Emergency Medicine, Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada
| |
Collapse
|
20
|
Christenson J, Innes G, McKnight D, Boychuk B, Grafstein E, Thompson CR, Rosenberg F, Anis AH, Gin K, Tilley J, Wong H, Singer J. Safety and efficiency of emergency department assessment of chest discomfort. CMAJ 2004; 170:1803-7. [PMID: 15184334 PMCID: PMC419767 DOI: 10.1503/cmaj.1031315] [Citation(s) in RCA: 103] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Most Canadian emergency departments use an unstructured, individualized approach to patients with chest pain, without data to support the safety and efficiency of this practice. We sought to determine the proportions of patients with chest discomfort in emergency departments who either had acute coronary syndrome (ACS) and were inappropriately discharged from the emergency department or did not have ACS and were held for investigation. METHODS Consecutive consenting patients aged 25 years or older presenting with chest discomfort to 2 urban tertiary care emergency departments between June 2000 and April 2001 were prospectively enrolled unless they had a terminal illness, an obvious traumatic cause, a radiographically identifiable cause, severe communication problems or no fixed address in British Columbia or they would not be available for follow-up by telephone. At 30 days we assigned predefined explicit outcome diagnoses: definite ACS (acute myocardial infarction [AMI] or definite unstable angina) or no ACS. RESULTS Of 1819 patients, 241 (13.2%) were assigned a 30-day diagnosis of AMI and 157 (8.6%), definite unstable angina. Of these 398 patients, 21 (5.3%) were discharged from the emergency department without a diagnosis of ACS and without plans for further investigation. The clinical sensitivity for detecting ACS was 94.7% (95% confidence interval [CI] 92.5%- 96.9%) and the specificity 73.8% (95% CI 71.5%- 76.0%). Of the patients without ACS or an adverse event, 71.1% were admitted to hospital or held in the emergency department for more than 3 hours. INTERPRETATION The current individualized approach to evaluation and disposition of patients with chest discomfort in 2 Canadian tertiary care emergency departments misses 5.3% of cases of ACS while consuming considerable health care resources for patients without coronary disease. Opportunities exist to improve both safety and efficiency.
Collapse
Affiliation(s)
- Jim Christenson
- Department of Surgery, University of British Columbia, and Department of Emergency Medicine, Providence Health Care, St. Paul's Hospital, Vancouver, BC.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|