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Questions and Answers
What is the primary cause of subarachnoid hemorrhage in most cases?
What is the primary cause of subarachnoid hemorrhage in most cases?
- Head injury
- Arteriovenous malformations
- Non-aneurysmal causes
- Ruptured aneurysm (correct)
The prognosis for non-aneurysmal subarachnoid hemorrhage is worse than that of aneurysmal.
The prognosis for non-aneurysmal subarachnoid hemorrhage is worse than that of aneurysmal.
False (B)
Which of the following accounts for 5% of subarachnoid hemorrhages?
Which of the following accounts for 5% of subarachnoid hemorrhages?
- Ruptured aneurysm
- Non-aneurysmal causes
- Arteriovenous malformations (correct)
- Head trauma
What is the Circle of Willis?
What is the Circle of Willis?
Which artery is the most common site for brain aneurysms?
Which artery is the most common site for brain aneurysms?
Match the following arteries with their percentage of brain aneurysms:
Match the following arteries with their percentage of brain aneurysms:
Who is at risk for subarachnoid hemorrhage?
Who is at risk for subarachnoid hemorrhage?
Patients with autosomal dominant polycystic kidney disease are at increased risk for subarachnoid hemorrhage.
Patients with autosomal dominant polycystic kidney disease are at increased risk for subarachnoid hemorrhage.
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Study Notes
Subarachnoid Hemorrhage
- Subarachnoid Hemorrhage (SAH) is typically caused by a ruptured aneurysm (85% of cases)
- Non-aneurysmal SAH accounts for 15% of cases and has a better prognosis.
- Arteriovenous malformations (AVMs) are responsible for 5% of SAH cases.
- The Circle of Willis is a circulatory anastomosis ensuring blood supply to the brain.
- The Circle of Willis consists of major arteries:
- Anterior Cerebral Arteries
- Anterior Communicating Arteries
- Middle Cerebral Arteries
- Posterior Communicating Arteries
- Posterior Cerebral Arteries
- Basilar Arteries
- Vertebral Arteries
- Most common sites for brain aneurysms are:
- Anterior Communicating Artery (30%)
- Posterior Communicating Artery (25%)
- Middle Communicating Artery (25%)
- Individuals with first-degree relatives who have saccular aneurysms are at increased risk.
- Patients with autosomal dominant polycystic kidney disease are more likely to experience SAH.
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