Lectures 21-23 Flashcards
(170 cards)
Stroke (Cerebrovascular disease)
- Cerebro = _
relating to the brain
Stroke (Cerebrovascular disease)
- vascular = _
Relating to the vessel
Brain functions
- controls movements
- stores memories
- source of thoughts, emotions & language
- many other functions: perception, breathing & digestion, etc.
To work properly brain needs _
oxygen
Although brain makes up only 2% of body weight, it uses almost _ % of the oxygen
18.5%
Brain is No. _ major single-organ that consumes the most oxygen
2 (Liver, brain, heart)
Brain cells are very _ to decrease in oxygen & don’t survive or function well long without it
sensitive
Because brain cells will _ if the supply of blood which carries oxygen is stopped, the brain has _ for the blood
- Even if other organs need blood, the body attempts to supply the brain with a constant flow of blood
- The blood brings many materials necessary for the brain to function properly
- die
- top priority
Stroke Pathophysiology:
87% of all cases
- Blood flow is interrupted/reduced, cells die within minutes without oxygen
Blockage (ischemic stroke)
Stroke Pathophysiology:
Every cell needs oxygen to function
- Cells use oxygen to break down sugar to get energy from the food
– This process is called _
cellular respiration
Stroke Pathophysiology:
The brain can survive for up to _ minutes after the heart stops
- This is why CPR should be started within _ minutes of cardiac arrest
– After _ minutes without CRP however, the brain begins to die
6
Stroke Pathophysiology:
Occurs when a blood clot blocks or plugs an artery leading to the brain
- A blood clot often forms in arteries damaged by the build-up of plaques (atherosclerosis)
- It can occur in the carotid artery of the neck as well as other arteries
Ischemic stroke
Stroke Pathophysiology:
Sudden brain bleeding puts too much pressure on cells which damages and kills them
Burst (hemorrhagic stroke)
Stroke Pathophysiology:
Hemorrhage/blood leaks into brain tissue
Hemorrhagic stroke (Burst)
Stroke Pathophysiology:
Risk factors
- High blood pressure
- Atherosclerosis
- Genetics & family history
Stroke Pathophysiology:
medical emergency —> _ & _
disability & death
Stroke Pathophysiology:
Build up of fats, cholesterol, and other substances in and on the artery walls; narrowing of blood vessels and build-up of plaque on artery walls
Atherosclerosis
Stroke Pathophysiology:
Can’t be cured, but is _
preventable
Stroke in the US:
_ leading cause of death
5th
Stroke in the US:
Killing >/= 140,000 Americans/year: 1 of every _ deaths
20
Stroke in the US:
Someone has stroke every _, someone dies of stroke every _
- 40 sec
- 4 minutes
Stroke in the US:
Every year, about _ Americans have a stoke
- About 610,000 of these are first or new strokes
- About 185,000 are recurrent strokes
800,000
Stroke in the US:
Costs about _ annually
$34 Billion
Stroke Consequences:
Symptoms of stroke include _
trouble walking, speaking, and understanding, as well as paralysis or numbness of the face, arm, or leg