A previously healthy 52-year-old male is evaluated in the trauma bay after complaining of a sudden, ripping sensation in his anterior chest that rapidly progressed to his interscapular region. Vital signs show a pulse of 118/min and blood pressures of 185/105 mm Hg in the right upper extremity and 145/88 mm Hg in the left upper extremity. Physical examination demonstrates a new high-pitched early diastolic murmur along the right sternal border. An electrocardiogram demonstrates sinus tachycardia and left ventricular hypertrophy. Arrange the following steps in the most appropriate chronological order for the management of this patient.
- 1Administration of intravenous esmolol
- 2Administration of intravenous nitroprusside
- 3CT angiography of the chest, abdomen, and pelvis
- 4Median sternotomy with ascending aortic graft replacement
Cevap
The correct chronological management sequence is: 1) Administration of intravenous esmolol, 2) Administration of intravenous nitroprusside, 3) CT angiography of the chest, abdomen, and pelvis, and 4) Median sternotomy with ascending aortic graft replacement.
The patient presents with classic signs of an acute Stanford type A aortic dissection (tearing chest pain, unequal blood pressures, and a new murmur of aortic regurgitation). Management requires a strict sequential approach to minimize aortic shear stress and secure definitive treatment. Intravenous beta-blockers (such as esmolol) are the crucial first step to decrease heart rate and left ventricular contractility. Once the heart rate is controlled, a vasodilator (such as nitroprusside) is added to safely lower systolic blood pressure to 100-120 mm Hg. After medical stabilization, CT angiography is performed to confirm the diagnosis and precisely delineate the anatomy. Finally, because the dissection involves the ascending aorta (type A), the patient must undergo emergent surgical repair via median sternotomy to prevent fatal complications.
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Anahtar Kavram
In the acute management of an aortic dissection, negative inotropes (beta-blockers) must be administered before vasodilators to prevent reflex tachycardia and increased aortic shear stress. This is followed by diagnostic imaging and emergent surgery for type A dissections.