PubMed · 88918
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J Wortsman, J Hirschowitz, N Soler. 1979. Danazol and thyroid function.. https://doi.org/10.7326/0003-4819-91-2-321_1
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Although acute myocardial infarction can be diagnosed on the basis of clinical history, electrocardiographic (ECG) findings, and abnormalities of creatine kinase (CK) and lactate dehydrogenase (LDH) enzyme levels, measurement of cardiac enzyme levels is the most reliable way to confirm or exclude the diagnosis. If the MB isoenzyme of creatine kinase (CK-MB) remains normal during the 48 hours after the suspected clinical event, acute myocardial infarction can be reliably ruled out; if CK-MB values become elevated and the LDH isoenzyme pattern (LDH2:LDH1 ratio) becomes "flipped," the diagnosis can reliably be made. However, if CK-MB values become elevated but the LDH isoenzyme pattern remains normal, the diagnosis is less firm and ECG and myocardial imaging techniques may be needed to confirm or exclude myocardial infarction.
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