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Historically, it described what is now known as a hemorrhagic stroke, typically involving a ruptured blood vessel in the brain; modern medicine typically specifies the anatomical location of the bleeding, such as cerebral apoplexy, ovarian apoplexy, or pituitary apoplexy. [1] [2] [3]
Ischemic (top), typically caused by a blood clot in an artery (1a) resulting in brain death to the affected area (2a). Hemorrhagic (bottom), caused by blood leaking into or around the brain from a ruptured blood vessel (1b) allowing blood to pool in the affected area (2b) thus increasing the pressure on the brain.
An intracranial aneurysm, also known as a cerebral aneurysm, is a cerebrovascular disorder characterized by a localized dilation or ballooning of a blood vessel in the brain due to a weakness in the vessel wall. These aneurysms can occur in any part of the brain but are most commonly found in the arteries of the cerebral arterial circle. The ...
Cerebral vasospasm is the prolonged, intense vasoconstriction of the larger conducting arteries in the subarachnoid space which is initially surrounded by a clot.Significant narrowing of the blood vessels in the brain develops gradually over the first few days after the aneurysmal rupture.
Three risk factors — high blood pressure, smoking and atrial fibrillation (which is an irregular heart rhythm) were linked with higher risk of severe compared to mild-moderate stroke,” said Dr ...
Aneurysmal blood vessels are prone to rupture under normal blood pressure and flow due to the special mechanical properties that make them weaker. To better understand this phenomenon, we can first look at healthy arterial vessels which exhibit a J-shaped stress-strain curve with high strength and high toughness [ clarify ] (for a biomaterial ...
A stroke is the name given to an interruption of blood flow to the brain due to blockage from a blood clot or a ruptured blood vessel. ... strokes can cause severe brain damage, which in turn can ...
It is caused by a blood vessel that ruptures and bleeds either within the tissue of the brain or in the space between the brain and the skull. ... which is often caused by a burst brain aneurysm, ...