Stroke | Nucleus Health
Stroke | Nucleus Health
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This video, created by Nucleus Medical Media, gives a thorough explanation of stroke, covering anatomy and physiology, different types of stroke, and treatment.
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Content
13.72 -> A stroke occurs when the blood flow in part of your brain is blocked.
21.22 -> After just a few minutes, the starved brain
cells begin to die.
34.38 -> Normally, the brain receives blood via two
major pairs of arteries,
41.04 -> which branch throughout brain tissue,
45.32 -> and supply your brain cells with
a constant flow of oxygen, glucose, and nutrients
52.26 -> necessary for their functions.
61.96 -> In one type of stroke, ischemic stroke,
67.5 -> an artery in your brain narrows,
72.02 -> or becomes completely blocked, preventing normal blood flow.
79 -> The blockage may be caused by a blood clot, also called a thrombus,
84.04 -> which forms in an unhealthy
artery of the brain.
90 -> The lack of blood flow causes the tissue the artery supplies to become starved, or ischemic.
98.58 -> Similarly, the blockage may be due to an embolus,
a blood clot that forms elsewhere in the body
107.24 -> and travels to the brain.
114.38 -> The embolus lodges in a narrow artery and obstructs blood flow.
128.52 -> In contrast, during a hemorrhagic stroke,
133.48 -> abnormal bleeding disrupts normal blood flow.
137.96 -> For example, in an intracerebral hemorrhagic stroke,
143.72 -> a blood vessel bursts, spilling blood directly onto your brain,
148.9 -> while robbing the intended tissue of nourishment.
153.6 -> Both the hemorrhage and ischemia destroy brain tissue.
160.1 -> A subarachnoid hemorrhagic stroke
164.86 -> occurs when a weak spot in a blood vessel wall, called an aneurysm, bursts
173.28 -> and leaks blood into the tight space between your brain and your skull.
178.14 -> The high-pressure bleeding results in serious damage to brain tissue.
190 -> Immediate treatment for your stroke may help
to minimize brain cell injury and death.
198.54 -> If you have an ischemic stroke,
202.38 -> you may be given medication to break up the clot causing your stroke.
209.72 -> Later, your doctor may recommend surgery,
213.84 -> such as carotid endarterectomy, to reduce your risk of having another ischemic stroke.
221.32 -> In the case of hemorrhagic stroke,
225.82 -> emergency surgery may be necessary
229.4 -> to repair damaged arteries,
234.26 -> or reduce the pressure of the blood on your brain.
240.26 -> You may be given medication to help the brain’s blood flow return to normal.
Source: https://www.youtube.com/watch?v=pcmrgwNCPwM