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Emergency department cardiac enzyme tests are not valuable for diagnosing chest pain. Doctors should rely on patient history and ECGs for admission decisions, not stat enzyme tests.
Area of Science:
- Cardiology
- Emergency Medicine
- Clinical Pathology
Background:
- Chest pain is a common emergency department (ED) complaint.
- Cardiac enzyme tests are frequently ordered in the ED to evaluate for myocardial infarction.
- The utility of stat cardiac enzyme testing in the ED for initial decision-making is debated.
Observation:
- A study analyzed patients presenting with chest pain in a community hospital ED.
- Cardiac enzyme levels were assessed for their value in determining patient disposition (admission vs. discharge).
- Other clinical factors, including patient history and electrocardiographic findings, were also considered.
Findings:
- Laboratory cardiac enzyme tests showed no value in the ED decision-making process for chest pain patients.
- Most patients had other clear reasons for discharge or admission based on their medical history and ECGs.
- ED cardiac enzyme results were poor predictors of subsequent myocardial infarction in admitted patients.
Implications:
- Stat cardiac enzyme testing in the ED for chest pain is not justified.
- Clinical judgment, patient history, and ECGs are more critical for initial chest pain assessment and disposition.
- Cardiac enzymes are valuable for monitoring hospitalized patients but not for initial ED evaluation.
Abstract:
All patients presenting to a community hospital with a complaint of "chest pain" were analyzed regarding the value of cardiac enzyme determinations done in the emergency department and eventual disposition to admission or discharge. The laboratory enzyme tests were found to be of no value in the decision-making process. The majority of patients had either a more compelling reason for dismissal home or historical and electrocardiographic indications mandating admission. An isolated emergency department enzyme evaluation was shown to be a poor indicator for subsequent infarction in patients who were admitted. While cardiac enzymes play a significant role in the monitoring and evolution of infarction in the hospitalized patient, there seems to be no justification for their being run on a stat basis in the emergency department.