A patient in their 50s presented to the emergency department with perspiration, persistent and squeezing chest pain, and chest distress that had persisted for 90 minutes without relief. Initial physical examination revealed a body temperature of 36.3 °C, blood pressure of 90/60 mm Hg, a pulse rate of 80 beats/min, and respiratory rate of 20 breaths/min. The 12-lead electrocardiogram (ECG) is shown in the Figure. The levels of lactate dehydrogenase (LDH) and creatine kinase–MB isoenzymes (CK-MB) were 1689 (reference range, <190) U/L and 173 (reference range, <15) U/L (to convert U/L to μkat/L, multiply by 0.0167), respectively.
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CME Disclosure Statement: Unless noted, all individuals in control of content reported no relevant financial relationships. If applicable, all relevant financial relationships have been mitigated.
Corresponding Author: Xue-Wei Qi, MSc, Peking University Health Science Center, No. 38 Xueyuan Rd, Haidian District, Beijing 100191, China (firstname.lastname@example.org).
Published Online: February 13, 2023. doi:10.1001/jamainternmed.2022.6447
Conflict of Interest Disclosures: None reported.
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