As we mentioned in part I, strokes are caused by uncontrolled diet that is high in saturated and trans fats as a result of bad cholesterol building up in the blood vessels that block the circulation of blood to the body including the brain. If oxygen is not delivered to the brain cells, some cells die off and can not reproduce, then you may get a stroke. Other happen when a blood vessel in the brain ruptures causing the cells in your brain deprived of oxygen.There are 2 types of strokes:
- Ischemic stroke caused by a clot or other blockage within an artery leading to the brain.
- Hemorrhagic stroke caused by the vessel in the brain rupturing in result of blood leaking into the brain.
This is the most common type of stroke accounting for almost 80% of all strokes. The brain depends on its arteries to bring fresh blood from the heart and lungs. The blood carries oxygen and nutrients to the brain, and takes away carbon dioxide and cellular waste. If an artery is blocked then the brain cells may not receive enough oxygen. They then cannot make enough energy and will eventually stop working.
a) If blood clots from the inside of the arteries of the brain, we have thrombic stroke.
Study shows that this type of stroke is responsible for almost 50% of all strokes. The most common problem is narrowing off the arteries in the neck or head.
b) If blood clotted in other parts of the body's arteries subsequently entering the brain, we have embolic stroke. In this case the clot was formed somewhere other than in the brain itself.
The clot then travels the bloodstream until they become lodged and can not travel any further. This naturally restricts the flow of blood to the brain and results in embolic stoke.
2. Hemorrhagic stroke
Hemorrhagic stroke occurs when a blood vessel bursts inside the brain, causing an increase of the fluid pressure on the brain and harms the brain by pressing it against the skull. Hemorrhagic stroke is associated with high blood pressure, which stresses the arterial walls until they break.
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