A 52-year-old male with a history of hypertension, hyperlipidemia, and recent myocardial infarction (1 month ago) presents to urgent care with shortness of breath for the past week. He denies fever, chest pain, or cough. On examination, the patient is breathing comfortably and saturating well on ambient air. Review the ECG taken and consider what your diagnosis and next steps would be. Resolution of the case is described on the following page.
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