A subarachnoid hemorrhage occurs when blood leaks into the space between two of the membranes surrounding the brain. A swollen blood vessel, or aneurysm, usually ruptures and causes the condition.

What Is a Brain Aneurysm? A brain aneurysm is a weak spot in the wall of a blood vessel inside the brain that can sometimes burst and cause a subarachnoid hemorrhage. Think of a weak spot in a balloon ...

Subarachnoid hemorrhage (SAH) refers to bleeding within the subarachnoid space, which is the area between the brain and the tissues that cover the brain. The subarachnoid space is the space where the ...

A 45 year-old man developed the lightning onset of an explosive headache followed by coma. Subarachnoid Hemorrhage - Basilar Artery Aneurysm. Axial CT scans without contrast. Note the bright signal ...

Patients who experience a nonaneurysmal subarachnoid hemorrhage differ from patients who suffer an aneurysmal subarachnoid hemorrhage in initial presentation (including neurological examination and ...

A 42 year-old woman developed a sudden, severe headache associated with vomiting. Her neurological examination was normal. Subarachnoid Hemorrhage - Sentinel Bleed. Axial CT scans without contrast.

Introduction: Spontaneous spinal subarachnoid hemorrhage (SAH) occurs in less than 1% of all cases of SAH, and idiopathic spontaneous spinal SAH is even more rare. Methods: A 48-year-old man presented ...