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Zorluk: OrtaCardiothoracic and Vascular Surgery

A 62-year-old man is brought to the emergency department by emergency medical services due to sudden, severe, and tearing anterior chest pain that radiates to his back. The pain started 45 minutes ago while he was mowing the lawn. His medical history is significant for long-standing, poorly controlled hypertension. Upon arrival, he appears diaphoretic and in severe distress. Vital signs are temperature 37.1°C (98.8°F), blood pressure 86/50 mm Hg, pulse 118/min, and respiratory rate 22/min. Physical examination reveals distended neck veins. Lungs are clear to auscultation bilaterally. Heart sounds are muffled, and there is a faint early diastolic murmur appreciated at the right upper sternal border. Extremities are cool to the touch, with delayed capillary refill. A bedside focused assessment with sonography for trauma (FAST) reveals a large pericardial effusion with early diastolic collapse of the right ventricle, as well as an intimal flap in the ascending aorta.

Which of the following is the most appropriate next step in the management of this patient?

  1. Emergent surgical repairCevap
  2. B
    Computed tomography angiography of the chest
  3. C
    Ultrasound-guided pericardiocentesis
  4. D
    Intravenous esmolol infusion
  5. E
    Thrombolytic therapy with alteplase

Cevap

Emergent surgical repair
The correct answer is emergent surgical repair. This patient has a Stanford Type A aortic dissection complicated by cardiac tamponade, as evidenced by his history of hypertension, tearing chest pain, hypotension, Beck's triad (muffled heart sounds, distended neck veins, hypotension), and echocardiographic findings of a pericardial effusion with right ventricular collapse and an ascending aortic intimal flap. The new-onset diastolic murmur is indicative of acute aortic regurgitation, a common complication of Type A dissections involving the aortic root. Stanford Type A dissections (involving the ascending aorta) are surgical emergencies due to the extremely high risk of fatal complications such as free wall rupture, massive stroke, or cardiac tamponade. The definitive and only life-saving treatment is immediate surgical repair via median sternotomy.

Adım Adım Çözüm

1
Analyze the patient's clinical presentation and vital signs.
The patient presents with tearing chest pain radiating to the back, hypotension (86/50 mm Hg), tachycardia, distended neck veins, and muffled heart sounds.
To identify the primary pathology and assess hemodynamic stability.
2
Interpret the physical exam and bedside echocardiogram findings.
The diastolic murmur suggests acute aortic regurgitation. The ultrasound confirms a pericardial effusion with right ventricular collapse and an intimal flap in the ascending aorta, diagnostic of a Stanford Type A aortic dissection complicated by cardiac tamponade.
To establish a definitive diagnosis using point-of-care imaging in an unstable patient.
3
Determine the most appropriate management based on the diagnosis and hemodynamic status.
Emergent surgical repair is selected. Pericardiocentesis is actively avoided despite the presence of tamponade.
Type A dissections require immediate surgery to prevent fatal rupture. Pericardiocentesis is contraindicated as it removes the tamponade effect that is temporarily restricting aortic hemorrhage.

Anahtar Kavram

Cardiac tamponade complicating a Stanford Type A aortic dissection requires emergent surgical repair; pericardiocentesis is contraindicated due to the high risk of precipitating massive, fatal exsanguination.
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Cardiothoracic and Vascular Surgery

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