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MediumEmergency MedicineAortic Dissectionukmlamrcem sbamrcp part 1pane

A 75-year-old man presents with sudden onset, severe, tearing chest pain radiating to his back. His blood pressure is 190/110 mmHg in the right arm and 140/85 mmHg in the left arm. ECG shows sinus tachycardia. Chest X-ray shows a widened mediastinum. What is the most likely diagnosis?

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