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Difficulty: MediumCardiothoracic and Vascular Surgery

Match each clinical presentation with its most likely cardiothoracic or vascular surgical diagnosis.

  • A 65-year-old man presents with sudden severe anterior chest pain, a new diastolic decrescendo murmur, and a 30 mm Hg difference in systolic blood pressure between arms.Acute ascending aortic dissection
  • A 72-year-old woman with a history of atrial fibrillation presents with sudden onset of severe right leg pain, pallor, poikilothermia, and absent pedal pulses.Acute arterial embolus
  • A 58-year-old male smoker presents with progressive bilateral buttock claudication, erectile dysfunction, and absent femoral pulses.Aortoiliac occlusive disease
  • A 45-year-old woman presents with episodes of dizziness and syncope specifically triggered by vigorous use of her left arm; her left radial pulse is diminished.Subclavian steal syndrome

Answer

The presentations match as follows: Presentation 1 is Acute ascending aortic dissection, Presentation 2 is Acute arterial embolus, Presentation 3 is Aortoiliac occlusive disease, and Presentation 4 is Subclavian steal syndrome.
Each clinical vignette provides classic pathognomonic signs for distinct vascular and cardiothoracic surgical conditions. Acute ascending aortic dissection presents with anterior chest pain, asymmetric pressures, and aortic regurgitation. Acute arterial embolus causes the sudden onset of acute limb ischemia ('6 Ps'). Aortoiliac occlusive disease presents as Leriche syndrome. Subclavian steal syndrome causes vertebrobasilar insufficiency upon upper extremity exertion.

Step-by-Step Solution

1
Analyze the first presentation involving sudden chest pain, a new diastolic murmur, and asymmetric blood pressures.
Identified as Acute ascending aortic dissection.
The murmur indicates aortic valve involvement (regurgitation) and the asymmetric pressures indicate arch vessel involvement, typical of a Type A dissection extending from the ascending aorta.
2
Analyze the second presentation involving sudden severe leg pain, pallor, pulselessness, and a history of atrial fibrillation.
Identified as Acute arterial embolus.
Atrial fibrillation strongly predisposes to mural thrombus formation, which can embolize to the peripheral arterial tree causing acute limb ischemia.
3
Analyze the third presentation involving buttock claudication, erectile dysfunction, and absent femoral pulses.
Identified as Aortoiliac occlusive disease.
This is the classic Leriche syndrome triad, resulting from chronic atherosclerotic occlusion of the distal abdominal aorta and common iliac arteries.
4
Analyze the fourth presentation involving exercise-induced dizziness and syncope in one arm, with a diminished pulse in that arm.
Identified as Subclavian steal syndrome.
Exercising the arm increases metabolic demand, stealing blood flow from the brain via retrograde flow in the ipsilateral vertebral artery due to proximal subclavian stenosis.

Key Concept

Recognition of classic clinical presentations of major cardiothoracic and vascular surgical pathologies is crucial for prompt diagnosis and targeted intervention.
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Topics

Cardiothoracic and Vascular Surgery

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