A 65-year-old man arrives at the emergency department reporting sudden-onset, severe, tearing chest pain that radiates to his back. His blood pressure is 195/110 mm Hg in both arms, and his heart rate is 112/min. A chest radiograph demonstrates a widened mediastinum. A presumptive clinical diagnosis of acute aortic dissection is made. Arrange the following management steps in the correct chronological sequence to safely stabilize and evaluate this patient.
- 1Administer intravenous esmolol
- 2Administer intravenous sodium nitroprusside
- 3Perform computed tomography (CT) angiography of the chest
- 4Consult cardiothoracic or vascular surgery
Answer
The correct sequence is to first administer intravenous esmolol, followed by intravenous sodium nitroprusside, then perform a CT angiogram, and finally consult surgery based on the imaging findings.
The standard management sequence for an acute aortic dissection prioritizes strict hemodynamic stabilization (anti-impulse therapy) before definitive imaging and surgical consultation. Heart rate and contractility must be controlled first with an intravenous beta-blocker (e.g., esmolol or labetalol) to reduce aortic wall shear stress. Only after adequate beta-blockade is achieved should an intravenous vasodilator (e.g., nitroprusside) be given to lower the blood pressure. Once the patient's hemodynamics are stabilized, a CT angiogram of the chest is obtained to visualize the extent of the dissection. Finally, the imaging results dictate the definitive management plan and appropriate surgical consultation.
Step-by-Step Solution
Key Concept
In the initial management of suspected acute aortic dissection, intravenous beta-blockers must be administered prior to intravenous vasodilators to prevent reflex tachycardia and increased aortic shear stress.
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