A middle-aged male presented in cardiac arrest. He had reportedly complained of preceding chest pain. Upon EMS arrival, his presenting rhythm was ventricular fibrillation (VF), which was refractory to multiple attempts at defibrillation. After receiving treatment for refractory VF, the patient had return of spontaneous circulation (ROSC). He was hypotensive, and ultimately required triple pressor support to maintain adequate mean arterial pressure. An initial electrocardiogram (EKG) was performed, which showed sinus tachycardia. A repeat EKG was performed one hour later, showing…

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