A 62-year-old man arrives at the emergency department reporting the abrupt onset of severe, tearing chest pain radiating to his interscapular region. He appears diaphoretic and anxious. Vital signs show a heart rate of 118/min and blood pressure of 215/115 mm Hg in the right arm and 180/100 mm Hg in the left arm. Neurologic examination is unremarkable. Cardiac auscultation reveals an early diastolic decrescendo murmur at the right upper sternal border. Electrocardiogram demonstrates sinus tachycardia and criteria for left ventricular hypertrophy but no acute ischemic changes. Arrange the following interventions in the most appropriate chronological sequence for the management of this patient.
- 1Intravenous esmolol administration
- 2Intravenous sodium nitroprusside administration
- 3Computed tomography angiography of the chest, abdomen, and pelvis
- 4Emergency median sternotomy and aortic repair
Cevap
The correct sequence is to first administer intravenous esmolol, followed by intravenous sodium nitroprusside, then obtain a CT angiography, and finally proceed to emergency aortic repair.
In the management of an acute aortic dissection, the immediate priority is to halt the propagation of the false lumen by minimizing aortic wall shear stress. This is accomplished through strict heart rate and blood pressure control (anti-impulse therapy). An intravenous beta-blocker (e.g., esmolol, labetalol) must be given first to lower the heart rate and decrease the rate of rise of ventricular pressure (dP/dt). Once the heart rate is controlled, an intravenous vasodilator (e.g., sodium nitroprusside) can be added to safely lower the systolic blood pressure. After the patient is hemodynamically optimized, definitive imaging with a CT angiography is performed to confirm the anatomy. Finally, this patient's clinical signs—specifically the new aortic regurgitation murmur and right-arm-predominant hypertension—point to a Type A (ascending) dissection, which mandates emergency surgical repair.
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Anahtar Kavram
Hemodynamic management of acute aortic dissection requires stepwise initiation of negative inotropes (beta-blockers) prior to vasodilators.