Hypertension is the term used to
describe high blood pressure.
Blood pressure is a measurement of
the force against the walls of your arteries as your heart pumps blood through
your body.
Blood pressure readings are usually
given as two numbers -- for example, 120 over 80 (written as 120/80 mmHg). One
or both of these numbers can be too high.
The top number is called the
systolic blood pressure, and the bottom number is called the diastolic blood
pressure.
- Normal blood pressure is when your blood pressure is
lower than 120/80 mmHg most of the time.
- High blood pressure (hypertension) is when your blood
pressure is 140/90 mmHg or above most of the time.
- If your blood pressure numbers are 120/80 or higher,
but below 140/90, it is called pre-hypertension.
If you have pre-hypertension, you
are more likely to develop high blood pressure.
If you have heart or kidney
problems, or if you had a stroke, your doctor may want your blood pressure to
be even lower than that of people who do not have these conditions.
Causes
Many factors can affect blood
pressure, including:
- How much water and salt you have in your body
- The condition of your kidneys, nervous system, or blood
vessels
- The levels of different body hormones
You are more likely to be told your
blood pressure is too high as you get older. This is because your blood vessels
become stiffer as you age. When that happens, your blood pressure goes up. High blood pressure increases your chance of
having a stroke, heart attack, heart failure, kidney disease, and early death.
You have a higher risk of high blood
pressure if you:
- Are African American
- Are obese
- Are often stressed or anxious
- Drink too much alcohol (more than one drink per day for
women and more than two drinks per day for men)
- Eat too much salt in your diet
- Have a family history of high blood pressure
- Have diabetes
- Smoke
Most of the time, no cause of high
blood pressure is found. This is called essential hypertension.
High blood pressure that is caused
by another medical condition or medication is called secondary hypertension.
Secondary hypertension may be due to:
Symptoms
Most of the time, there are no
symptoms. For most patients, high blood pressure is found when they visit their
health care provider or have it checked elsewhere.
Because there are no symptoms,
people can develop heart disease and kidney problems without knowing they have
high blood pressure.
If you have a severe headache,
nausea or vomiting, bad headache, confusion, changes in your vision, or
nosebleeds you may have a severe and dangerous form of high blood pressure
called malignant hypertension.
Exams
and Tests
Your health care provider will check
your blood pressure several times before diagnosing you with high blood
pressure. It is normal for your blood pressure to be different depending on the
time of day.
Blood pressure readings taken at
home may be a better measure of your current blood pressure than those taken at
your doctor's office. Make sure you get a good quality, well-fitting home
device. It should have the proper sized cuff and a digital readout.
Practice with your health care
provider or nurse to make sure you are taking your blood pressure correctly.
Your doctor will perform a physical
exam to look for signs of heart disease, damage to the eyes, and other changes
in your body.
Tests may be done to look for:
Treatment
The goal of treatment is to reduce
blood pressure so that you have a lower risk of complications. You and your
health care provider should set a blood pressure goal for you.
If you have pre-hypertension, your health
care provider will recommend lifestyle changes to bring your blood pressure
down to a normal range. Medicines are rarely used for pre-hypertension.
You can do many things to help
control your blood pressure, including:
- Eat a heart-healthy diet, including potassium and
fiber, and drink plenty of water.
- Exercise regularly -- at least 30 minutes of aerobic
exercise a day.
- If you smoke, quit -- find a program that will help you
stop.
- Limit how much alcohol you drink -- one drink a day for
women, two a day for men.
- Limit the amount of sodium (salt) you eat -- aim for
less than 1,500 mg per day.
- Reduce stress -- try to avoid things that cause you stress.
You can also try meditation or yoga.
- Stay at a healthy body weight -- find a weight-loss
program to help you, if you need it.
Your health care provider can help
you find programs for losing weight, stopping smoking, and exercising. You can
also get a referral from your doctor to a dietitian, who can help you plan a
diet that is healthy for you.
Prevention
Adults over 18 should have their
blood pressure checked regularly.
Lifestyle changes may help control
your blood pressure.
Follow your health care provider's
recommendations to modify, treat, or control possible causes of high blood
pressure.