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Subarachnoid Hemorrhage Overview

Created by

@AffirmativeGulf

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Questions and Answers

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.

False

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?

A circulatory anastomosis ensuring blood supply to the brain. Signup and view all the answers

Which artery is the most common site for brain aneurysms?

Anterior Communicating Artery Signup and view all the answers

Match the following arteries with their percentage of brain aneurysms:

Anterior Communicating Artery = 30% Posterior Communicating Artery = 25% Middle Cerebral Artery = 25% Signup and view all the answers

Who is at risk for subarachnoid hemorrhage?

First-degree relatives of those with saccular aneurysms Signup and view all the answers

Patients with autosomal dominant polycystic kidney disease are at increased risk for subarachnoid hemorrhage.

True Signup and view all the answers

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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Description

This quiz dives into the critical aspects of Subarachnoid Hemorrhage (SAH), including its causes, particularly ruptured aneurysms. It elaborates on the Circle of Willis and its major arteries that supply blood to the brain, along with the common sites for aneurysms. Additionally, it covers risk factors associated with SAH, providing a comprehensive understanding for medical students and professionals.