Blood Pressure is the pressure that flowing
blood exerts on the arteries. The heart contracts and relaxes,
creating two levels of blood pressure. SYSTOLIC pressure
is the highest level of blood pressure, it is the level
of pressure when the heart contracts. DIASTOLIC pressure
is the lowest level of blood pressure, it is the level of
pressure when the heart relaxes.
Blood pressure values are measured in millimeters of mercury
(written as mmHg). For example, if your blood pressure is
126/76, the systolic pressure is 126 mmHg, and the diastolic
pressure is 76 mmHg. High blood pressure, or hypertension,
is a level of blood pressure consistently above normal.
Most doctors consider a "normal" blood pressure
reading for an adult to be 120/80, although it varies according
to the individual. Standards for assessment of high or low
blood pressure, without regard to age, have been established
by the World Health Organization. (Reference Material:
Investigation into Adult Diseases Report by the Ministry
of Health and Social Security, 1971.) |
| According to recent estimates, nearly one in
three U.S. adults has high blood pressure, but because there
are no symptoms, nearly one-third of these people don't know
they have it. In fact, many people have high blood pressure
for years without knowing it. Uncontrolled high blood pressure
can lead to stroke, heart attack, heart failure or kidney
failure. This is why high blood pressure is often called the
"silent killer." The only way to tell if you have
high blood pressure is to have your blood pressure checked.
Visit the American Heart Association on-line at www.americanheart.org. |