Browsing by Author "Than, Martin"

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    2-Hour Accelerated Diagnostic Protocol to Assess Patients With Chest Pain Symptoms Using Contemporary Troponins as the Only Biomarker
    (2012-06) Than, Martin; Cullen, Louise; Aldous, Sally; Parsonage, William A; Reid, Christopher M; Greenslade, Jaimi; Flaws, Dylan; Hammett, Christopher J; Beam, Daren M; Ardagh, Michael W; Troughton, Richard; Brown, Anthony FT; George, Peter; Florkowski, Christopher M; Kline, Jeffrey A.; Peacock, W Frank; Maisel, Alan S; Lim, Swee Han; Lamanna, Arvin; Richards, A Mark
    Objectives The purpose of this study was to determine whether a new accelerated diagnostic protocol (ADP) for possible cardiac chest pain could identify low-risk patients suitable for early discharge (with follow-up shortly after discharge). Background Patients presenting with possible acute coronary syndrome (ACS), who have a low short-term risk of adverse cardiac events may be suitable for early discharge and shorter hospital stays. Methods This prospective observational study tested an ADP that included pre-test probability scoring by the Thrombolysis In Myocardial Infarction (TIMI) score, electrocardiography, and 0 + 2 h values of laboratory troponin I as the sole biomarker. Patients presenting with chest pain due to suspected ACS were included. The primary endpoint was major adverse cardiac event (MACE) within 30 days. Results Of 1,975 patients, 302 (15.3%) had a MACE. The ADP classified 392 patients (20%) as low risk. One (0.25%) of these patients had a MACE, giving the ADP a sensitivity of 99.7% (95% confidence interval [CI]: 98.1% to 99.9%), negative predictive value of 99.7% (95% CI: 98.6% to 100.0%), specificity of 23.4% (95% CI: 21.4% to 25.4%), and positive predictive value of 19.0% (95% CI: 17.2% to 21.0%). Many ADP negative patients had further investigations (74.1%), and therapeutic (18.3%) or procedural (2.0%) interventions during the initial hospital attendance and/or 30-day follow-up. Conclusions Using the ADP, a large group of patients was successfully identified as at low short-term risk of a MACE and therefore suitable for rapid discharge from the emergency department with early follow-up. This approach could decrease the observation period required for some patients with chest pain. (An observational study of the diagnostic utility of an accelerated diagnostic protocol using contemporary central laboratory cardiac troponin in the assessment of patients presenting to two Australasian hospitals with chest pain of possible cardiac origin; ACTRN12611001069943)
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    A comprehensive standardised data definitions set for acute coronary syndrome research in emergency departments in Australasia
    (2010-02) Cullen, Louise; Than, Martin; Brown, Anthony; Richards, Mark; Parsonage, William; Flaws, Dylan; Hollander, Judd; Christenson, Robert; Kline, Jeffrey A.; Goodacre, Steven; Jaffe, Alan
    Patients with chest discomfort or other symptoms suggestive of acute coronary syndrome are one of the most common categories seen in many Emergency Departments (EDs). Although the recognition of patients at high risk of acute coronary syndrome has improved steadily, identifying the majority of chest pain presentations who fall into the low-risk group remains a challenge. Research in this area needs to be transparent, robust, applicable to all hospitals from large tertiary centres to rural and remote sites, and to allow direct comparison between different studies with minimum patient spectrum bias. A standardized approach to the research framework using a common language for data definitions must be adopted to achieve this. The aim was to create a common framework for a standardized data definitions set that would allow maximum value when extrapolating research findings both within Australasian ED practice, and across similar populations worldwide. Therefore a comprehensive data definitions set for the investigation of non-traumatic chest pain patients with possible acute coronary syndrome was developed, specifically for use in the ED setting. This standardized data definitions set will facilitate‘knowledge translation’ by allowing extrapolation of useful findings into the real-life practice of emergency medicine.
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    Using Sex‐specific Cutoffs for High‐sensitivity Cardiac Troponin T to Diagnose Acute Myocardial Infarction
    (Wiley, 2021-04) Peacock, W. Frank; Baumann, Brigitte M.; Rivers, E. Joy; Davis, Thomas E.; Handy, Beverly; Jones, Christopher W.; Hollander, Judd E.; Limkakeng, Alexander T.; Mehrotra, Abhi; Than, Martin; Cullen, Louise; Ziegler, André; Dinkel-Keuthage, Carina; Pathology and Laboratory Medicine, School of Medicine