What is the most common cause of a spontaneous subarachnoid hemorrhage?
Ruptured intracranial aneurysm is the most common cause of spontaneous SAH (around 85% of cases) [2].
What is Tentorial hemorrhage?
Tentorial hematoma was defined as hyperdensity in posterior fossa near tentorium ceribelli with hounsefield unit of 60-90 on plain CT head.
What causes traumatic subarachnoid hemorrhage?
Subarachnoid hemorrhage (SAH) is a type of stroke. Head trauma is the most common cause. In patients without head trauma, SAH is most commonly caused by a brain aneurysm. A brain aneurysm is a ballooning of an artery in the brain that can rupture and bleed into the space between the brain and the skull.
What are the main complications associated with SAH?
There are four major complications to subarachnoid hemorrhage. Those complications are vasospasm, hydrocephalus, seizures, and rebleeding.
What is Tentorial?
: a bony ridge on the inner surface of the skull that marks the attachment of the tentorium.
What is Tentorial meningioma?
Tentorial meningiomas are rare tumors located along the surface of the tentorium cerebella in the brain. These types of posterior fossa meningiomas can cause headaches, seizures, and difficulty walking.
What is traumatic subarachnoid haemorrhage?
Traumatic subarachnoid hemorrhage (SAH) is the pathologic presence of blood within the subarachnoid spaces, typically the superficial sulci along the cerebral convexities. 1,2. It is the second most common acute brain injury finding on computed tomography (CT) in traumatic brain injury (TBI) patients.
Can SAH reoccur?
Background and Purpose— Because intracranial aneurysms develop during life, patients with subarachnoid hemorrhage (SAH) and successfully occluded aneurysms are at risk for a recurrence.
What causes brain damage with a subarachnoid hemorrhage?
Sometimes bleeding is caused by trauma, an abnormal tangle of blood vessels in your brain (arteriovenous malformation), or other blood vessel or health problems. Untreated, a subarachnoid hemorrhage can lead to permanent brain damage or death. Winn HR. Perioperative management of subarachnoid hemorrhage.
How is subarachnoid hemorrhage related to thunderclap headache?
Subarachnoid hemorrhage accounts for 3% of stroke and 5% of stroke deaths 2. Patients typically present with a thunderclap headache, described as a sudden-onset headache that is the worst headache of their life. It is often associated with photophobia and meningism.
How is a tentorial subdural hematoma confirmed by CT?
CT revealed only symmetric thickening of the tentorium. MR imaging revealed the presence of a 10-mm anterior communicating artery aneurysm, which was confirmed by digital subtraction angiography. The radiologic findings and possible mechanisms of this hemorrhage are discussed.
Why does the arachnoid tear in the subdural hematoma?
One theory suggests the force of the rupture results in a tearing of the arachnoid with subsequent spilling of blood into the subdural space.