CK-MB Activity, Any Additional Benefit to Negative Troponin in Evaluating Patients with Suspected Acute Myocardial Infarction in the Emergency Department.

Background: Coronary heart disease is now the leading cause of death. Diagnosing myocardial infraction (MI) needs cardiac marker in case of equivocal clinical presentations and EKG interpretations. Troponin yields high sensitivity and specificity and could be used as a single screening assay.