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One of the causes of heart attack or stroke is High cholesterol. When the cholesterol level in the blood increases, it penetrates the arterial wall and gets stuck; white blood cells circulating in the blood then enter the arterial wall and gobble up the cholesterol; the accumulation of lipid-loaded white blood cells causes local injury, leading to cell death, calcification, and the development of a collagen-laden "fibrous cap" over the atherosclerotic lesion. When the cap ruptures, the blood clots, blocking the artery and causing a heart attack. This is called the lipid hypothesis .
But Heart disease is a heterogeneous compilation of diseases of the heart and blood vessels with many different causes. Some of these include disturbances of the rhythm of the heart, calcification of the middle portion of the blood vessels and calcification of the heart valves, and congestive heart failure.
So to sum it up, I would say that it's important to understand the basics about cholesterol and its implications for heart disease. Know your own cholesterol levels, and if you do have high cholesterol, talk to your doctor about ways you can lower your cholesterol and reduce your risk of heart disease.
Better understand the Cholesterol with these Cholesterol Information Videos.
