Early Rule-Out and Rule-In Strategies for Myocardial Infarction
Louise A Cullen1, Nicholas L Mills2, Simon Mahler3
1Royal Brisbane and Women's Hospital, Brisbane, Australia; louise.cullen@health.qld.gov.au.
Insights
Accelerated diagnostic protocols using troponin algorithms can safely discharge most emergency chest pain patients. Further research is needed to confirm the clinical and economic benefits of these rapid rule-out strategies for acute myocardial infarction.
Area of Science:
- Cardiology
- Emergency Medicine
- Biomarker Research
Background:
- Chest pain is a common emergency presentation, straining healthcare resources.
- Accurate and rapid identification of acute myocardial infarction (AMI) is crucial.
- Balancing timely diagnosis with safe patient discharge is a clinical challenge.
Purpose of the Study:
- To review evidence on accelerated strategies for ruling in/out AMI.
- To focus on the optimal use of troponin results in emergency settings.
- To discuss novel biomarkers and their integration into diagnostic protocols.
Main Methods:
- Review of existing evidence on accelerated diagnostic strategies.
- Analysis of troponin assay results (sensitive and highly sensitive).
- Consideration of novel biomarkers and clinical data integration.
Main Results:
- Accelerated protocols can identify patients suitable for direct discharge.
- Focus on troponin algorithms and diagnostic protocols is key.
- Evidence supports the use of sensitive troponin assays.
Conclusions:
- Most patients without AMI risk can be discharged from the emergency department.
- Troponin-based algorithms and accelerated protocols show promise.
- Further studies are needed on the clinical and economic impact of these strategies.
Background:
Patients with chest pain comprise a large proportion of emergency presentations and place a major burden on healthcare resources. Therefore, efforts to safely and rapidly identify those with and without acute myocardial infarction (AMI) are needed. The challenge for clinicians is to accurately identify patients with acute coronary syndromes, while balancing the need to safely and rapidly reassure and discharge those without serious conditions.
Content:
This review summarizes the evidence to date on optimum accelerated strategies for the rule-in and rule-out of AMI, using strategies focused on optimum use of troponin results. Evidence based on both sensitive and highly sensitive troponin assay results is presented. The use of novel biomarkers is also addressed and the combination of biomarkers with other clinical information in accelerated diagnostic strategies is discussed.
Summary:
The majority of patients, who are not at risk of myocardial infarction or other serious harm, may be suitable for discharge directly from the emergency setting using approaches focused on troponin algorithms and accelerated diagnostic protocols. Evidence about the clinical and health economic impact of use of such strategies is needed, as they may have major benefits for both patients and healthcare providers.
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