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HardCardiology & Cardiovascular diseaseAcute aortic dissectionNICE Thoracic Aortic Aneurysm Guideline

A 47-year-old man with Marfan syndrome presents with severe chest pain radiating to the back, unequal blood pressures in arms, and a decrescendo diastolic murmur. You suspect acute aortic dissection. What is the most urgent diagnostic test to confirm the diagnosis?

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