Cerebrovascular Disease USMLE Step 1 Practice Question
A 79-year-old man on warfarin for atrial fibrillation presents with progressive confusion and headache 2 weeks after a minor fall. Vital signs show BP 158/92 mmHg, HR 88/min, RR 16/min, temp 37.2°C. CT head reveals a crescent-shaped hyperdense collection crossing suture lines. Serum INR is 4.2. There is no focal neurologic deficit. Which vessel is most likely ruptured?
Answer choices
- AMiddle meningeal artery
- BLenticulostriate arteries
- CBridging veinsCorrect answer
- DSubarachnoid cisterns
- EPosterior communicating artery aneurysm
- FAnterior cerebral artery
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