What is Blood Pressure
Blood pressure is the amount of force your blood exerts against the walls of your arteries. Normal blood pressure effectively and harmlessly pushes the blood from your heart to your body's organs and muscles so they can receive the oxygen and nutrients they need. Blood pressure is variable—it rises and falls during the day. When blood pressure stays elevated over time, however, it is called high blood pressure or hypertension. According to the most recent estimates, about 73 million Americans age 20 and older have hypertension and nearly half are women, according to the American Heart Association. High blood pressure killed nearly 54,707 Americans in 2004 and was listed as a primary or contributing factor in 300,000 deaths. Hypertension can occur in both children and adults, but it is more common in adults, particularly African Americans and the elderly. People with other conditions such as diabetes and kidney disease are likely to become hypertensive. In addition, ...