heart disease
Cardiovascular diseases rank as America's number 1 killer. They claim the lives of 42.7 percent of the more than 2 million Americans who die each year. Cancer follows, killing 23.8 percent. All other causes of death account for 33.5 percent. Medical research continually seeks to reduce disability and death from heart attack, stroke and other heart and blood vessel diseases. However, more than 56 million Americans heart defects to high blood pressure and hardening of the arteries. As a result, Americans will pay an estimated $128 billion in 1955 for medical cost and disability. Especially costly to American business are the deaths of skilled employees between the ages of 35 and 64, where the loss of management and production skills and the cost of training replacement The human heart is a muscle that pumps blood. Blood containing food and oxygen to meet the heart's own needs come from the coronary arteries. Fatty deposits (called Plaque) made of cholesterol and other substances can build up in the walls of these vessels. Over time such deposits marrow the arteries are reduce or stop blood flow to the heart. This may cause chest pain called angina pector
To understand how, think about how a nozzle regulates the water pressure in a hose. Most people still associate cigarette smoking with breathing problems. And men are likely to suffer heart attacks earlier in life than women. About 200,000 of them are due cardiovascular diseases. Not all these symptoms occur in every heart attack. Three years after quitting, your risk of death from heart attack is about the same as if you'd never smoked before. High Blood Cholesterol: Cholesterol is a soft, fat-like substance found in all your body's cells. Cholesterol comes from two sources. There are several kids of lipoproteins, but the ones we're most concerned about are low density lipoprotein (ldl) and high density (hdl). Prompt treatment reduces heart muscle damage and increases the odds of survival. Second - hand smoke is just as bad for young people because of all the chemicals that are in it. It is important to stop smoking before the signs of heart disease appear. Activities often recommended for improving cardiovascular fitness include walking or hiking, hogging, bicycling, swimming, roller skating, jumping rope and active sports or games. African-Americans, for example, have a grater risk of heart attack because they're more prone to high blood pressure.
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