What Is Blood Pressure-And What Happens When It is High? Since blood is carried from the heart to all of your body's tissue and organs in vessels called arteries, blood pressure is the force of the blood pushing against the walls of those arteries.

Ailments related to High Blood Pressure

If untreated this can lead to serious medical problems like these: Arteriosclerosis ("hardening of the arteries"). High blood pressure harms the arteries by making them thick and stiff. This speeds the build up of cholesterol and fats in the blood vessels like rust in a pipe, which prevents the blood from flowing through the body, and in time can lead to a heart attack or stroke. Heart Attack. Blood carries oxygen to the body. When the arteries that bring blood to the heart muscle become blocked, the heart cannot get enough oxygen. Reduced blood flow can cause chest pain (angina). Eventually, the flow may be stopped completely, causing a heart attack. Enlarged heart. High blood pressure causes the heart to work harder. Over time, this causes the heart to thicken and stretch. Eventually the heart fails to function normally causing fluids to back up into the lungs. Controlling high blood pressure can prevent this from happening. Kidney Damage. The kidney acts as a filter to rid the body of wastes. Over a number of years, high blood pressure can narrow and thicken the blood vessels of the kidney. The kidney filters less fluid, and waste builds up in the blood. The kidneys may fail altogether. When this happens, medical treatment (dialysis) or a kidney transplant may be needed. Stroke. High blood pressure can harm the arteries, causing them to narrow faster. So, less blood can get to the brain. If a blood clot blocks one of the narrowed arteries, a stroke (thrombotic stroke) may occur. A stroke can also occur when very high pressure causes a break in a weakened blood vessel in the brain (hemorrhagic stroke).

Who's Likely To Develop High Blood Pressure?

Anyone can develop high blood pressure, but some people are more likely to develop it than others. For example, high blood pressure is more common--it develops earlier and is more severe--in African-Americans than in whites.

In the early and middle adult years, men have high blood pressure more often than women. But as men and women age, the reverse is true. More women after menopause have high blood pressure than men of the same age. And the number of both men and women with high blood pressure increases rapidly in older age groups.

More than half of all Americans over age 65 have high blood pressure. And older African-American women who live in the Southeast are more likely to have high blood pressure than those in other regions of the United States.

In fact, the southeastern states have some of the highest rates of death from stroke. High blood pressure is the key risk factor for stroke. Other risk factors include cigarette smoking and overweight.

These 11 states--Alabama, Arkansas, Georgia, Indiana, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, and Virginia--have such high rates of stroke among persons of all races and in both sexes that they are called the "Stroke Belt States."

Finally, heredity can make some families more likely than others to get high blood pressure. If your parents or grandparents had high blood pressure, your risk may be increased. While it is mainly a disease of adults, high blood pressure can occur in children as well. Even if everyone is healthy, be sure you and your family get your blood pressure checked. Remember, high blood pressure has no signs or symptoms.