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- W2074433724 abstract "Early identification of acute myocardial infarction (AMI) is necessary to initiate appropriate treatment. In patients presenting without ST-segment elevation, diagnosis is often dependent on the presence of elevated myocardial markers. This study examines the ability of serial MB mass alone and in combination with myoglobin in diagnosing AMI in patients without ST-segment elevation within 3 hours of presentation. In all, 2,093 patients were admitted and underwent serial marker analysis using myoglobin, creatine kinase (CK), and CK-MB at 0, 3, 6, and 8 hours. AMI was diagnosed by a CK-MB ≥8.0 ng/ml and a relative index (RI) (CK-MB × 100/total CK) ≥4.0. A total of 186 patients (9%) were diagnosed with AMI. The optimal diagnostic strategy was an elevated CK-MB + RI on the initial or 3-hour sample or at least a twofold increase in CK-MB without exceeding the upper range of normal over the 3-hour time period (sensitivity 93%, specificity 98%). The combination of an elevated CK-MB + RI or myoglobin on the initial or 3-hour sample had a sensitivity of 94%, although specificity was significantly lower, at 86%. Sensitivities and specificities after exclusion of the 242 patients with ischemic electrocardiographic changes were essentially unchanged. We conclude that most patients with AMI presenting with nondiagnostic electrocadiograms can be diagnosed within 3 hours of presentation." @default.
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- W2074433724 date "1999-01-01" @default.
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- W2074433724 title "Early diagnosis of acute myocardial infarction in patients without ST-segment elevation" @default.
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- W2074433724 doi "https://doi.org/10.1016/s0002-9149(98)00816-9" @default.
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