Vascular Disease USMLE Step 1 Practice Question
A 56-year-old man with a 30-pack-year smoking history and recently diagnosed atrial fibrillation presents with acute onset of unilateral leg pain, coolness, and pallor. Vital signs show BP 142/88 mmHg, HR 108 bpm (irregular), RR 16, temperature 37.2°C. Physical examination reveals absent femoral pulse on the affected side and intact sensory function. Point-of-care ultrasound demonstrates no deep venous thrombosis. He takes no anticoagulants. Which of the following is the most likely diagnosis?
Answer choices
- AAcute venous thrombosis of the iliac vein
- BPopliteal artery entrapment syndrome
- CAtherosclerotic thrombosis of femoral artery
- DAcute arterial thromboembolism from cardiac sourceCorrect answer
- ERuptured Baker cyst with compartment syndrome
- FDissection of the external iliac artery
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