Subarachnoid hemorrhage causes: Difference between revisions
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
Spontaneous SAH is most often due to rupture of [[cerebral aneurysm]]s (85%), which are weaknesses in the wall of the [[artery|arteries]] of the brain that enlarge. While most cases of SAH are due to bleeding from small aneurysms, there is evidence from research that larger aneurysms (which are rarer) are still more likely to rupture. A further 10% of cases is due to non-aneurysmal perimesencephalic hemorrhage, in which the blood is limited to the area of the midbrain. No aneurysms are generally found. The remaining 5% are due to [[vasculitis|vasculitic]] damage to arteries, other disorders affecting the vessels, disorders of the [[spinal cord]] blood vessels, and bleeding into various [[tumor]]s. | Spontaneous SAH is most often due to rupture of [[cerebral aneurysm]]s (85%), which are weaknesses in the wall of the [[artery|arteries]] of the brain that enlarge. While most cases of SAH are due to bleeding from small aneurysms, there is evidence from research that larger aneurysms (which are rarer) are still more likely to rupture. A further 10% of cases is due to non-aneurysmal perimesencephalic hemorrhage, in which the blood is limited to the area of the midbrain. No aneurysms are generally found. The remaining 5% are due to [[vasculitis|vasculitic]] damage to arteries, other disorders affecting the vessels, disorders of the [[spinal cord]] blood vessels, and bleeding into various [[tumor]]s. | ||
==Causes== | |||
Subarachnoid hemorrhages may be caused by trauma or may be occurred spontaneously. | |||
Common causes of subarachnoid hemorrhages include: | |||
=== Trauma === | |||
Rupture of an aneurysm | Head trauma following accident or a fall | ||
* Saccular aneurysms (most common cause) | === Spontaneous === | ||
'''Rupture of an aneurysm''' | |||
* [[Aneurysm|Saccular aneurysms]] (most common cause) | |||
* Fusiform aneurysms | * Fusiform aneurysms | ||
* Mycotic aneurysms | * Mycotic aneurysms | ||
Vascular malformation | |||
*Arteriovenous malformation | ==== Vascular malformation ==== | ||
*Dural arteriovenous fistula | *[[Arteriovenous malformation]] | ||
*[[Dural arteriovenous fistula]] | |||
*Perimesencephalic | *Perimesencephalic | ||
*Intracranial arterial dissection | *[[Arterial dissection|Intracranial arterial dissection]] | ||
*Amyloid angiopathy | *[[Amyloid angiopathy]] | ||
Bleeding diatheses | |||
==== Bleeding diatheses ==== | |||
Illicit drug use | ==== Illicit drug use ==== | ||
*[[Cocaine]] | *[[Cocaine]] | ||
*[[Amphetamines]] | *[[Amphetamines]] | ||
Drug side effect | |||
==== Drug side effect ==== | |||
*[[Almotriptan]] | *[[Almotriptan]] | ||
*[[Naratriptan]] | *[[Naratriptan]] | ||
Revision as of 22:26, 6 December 2016
|
Subarachnoid Hemorrhage Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
AHA/ASA Guidelines for the Management of Aneurysmal Subarachnoid Hemorrhage (2012)
|
|
Case Studies |
|
Subarachnoid hemorrhage causes On the Web |
|
American Roentgen Ray Society Images of Subarachnoid hemorrhage causes |
|
Risk calculators and risk factors for Subarachnoid hemorrhage causes |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Cafer Zorkun, M.D., Ph.D. [2]
Overview
Spontaneous SAH is most often due to rupture of cerebral aneurysms (85%), which are weaknesses in the wall of the arteries of the brain that enlarge. While most cases of SAH are due to bleeding from small aneurysms, there is evidence from research that larger aneurysms (which are rarer) are still more likely to rupture. A further 10% of cases is due to non-aneurysmal perimesencephalic hemorrhage, in which the blood is limited to the area of the midbrain. No aneurysms are generally found. The remaining 5% are due to vasculitic damage to arteries, other disorders affecting the vessels, disorders of the spinal cord blood vessels, and bleeding into various tumors.
Causes
Subarachnoid hemorrhages may be caused by trauma or may be occurred spontaneously.
Common causes of subarachnoid hemorrhages include:
Trauma
Head trauma following accident or a fall
Spontaneous
Rupture of an aneurysm
- Saccular aneurysms (most common cause)
- Fusiform aneurysms
- Mycotic aneurysms
Vascular malformation
- Arteriovenous malformation
- Dural arteriovenous fistula
- Perimesencephalic
- Intracranial arterial dissection
- Amyloid angiopathy