Diagnosis
Blood pressure measurementOpen pop-up
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Your doctor will ask questions
about your medical history and do a physical examination. The doctor, nurse or
other medical assistant will place an inflatable arm cuff around your arm and
measure your blood pressure using a pressure-measuring gauge.
Your blood pressure generally
should be measured in both arms to determine if there is a difference. It's
important to use an appropriate-sized arm cuff.
Blood pressure measurements fall
into several categories:
·
Normal blood pressure. Your blood pressure is normal if it's below 120/80 mm Hg.
·
Elevated
blood pressure. Elevated blood pressure is a systolic pressure ranging
from 120 to 129 mm Hg and a diastolic pressure below (not above) 80 mm Hg.
Elevated blood pressure tends to get worse over time unless steps are taken to
control blood pressure. Elevated blood pressure may also be called
prehypertension.
·
Stage
1 hypertension. Stage 1 hypertension is a systolic pressure ranging from
130 to 139 mm Hg or a diastolic pressure ranging from 80 to 89 mm Hg.
·
Stage 2 hypertension. More-severe hypertension, stage 2 hypertension is a
systolic pressure of 140 mm Hg or higher or a diastolic pressure of 90 mm Hg or
higher.
·
Hypertensive
crisis. A blood pressure measurement higher than 180/120 mm Hg is
an emergency situation that requires urgent medical care. If you get this
result when you take your blood pressure at home, wait five minutes and retest.
If your blood pressure is still this high, contact your doctor immediately. If
you also have chest pain, vision problems, numbness or weakness, breathing
difficulty, or any other signs and symptoms of a stroke or heart attack, call
911 or your local emergency medical number.
Both numbers in a blood pressure
reading are important. But after age 50, the systolic reading is even more important.
Isolated systolic hypertension is a condition in which the diastolic pressure
is normal (less than 80 mm Hg) but systolic pressure is high (greater than or
equal to 130 mm Hg). This is a common type of high blood pressure among people
older than 65.
Because blood pressure normally
varies during the day and may increase during a doctor visit (white coat
hypertension), your doctor will likely take several blood pressure readings at
three or more separate appointments before diagnosing you with high blood
pressure.
Taking your blood pressure at home
Your doctor may ask you to
record your blood pressure at home to provide additional information and
confirm if you have high blood pressure.
Home monitoring is an important
way to confirm if you have high blood pressure, to check if your blood pressure
treatment is working or to diagnose worsening high blood pressure.
Home blood pressure monitors are
widely available and inexpensive, and you don't need a prescription to buy one.
Home blood pressure monitoring isn't a substitute for visits to your doctor,
and home blood pressure monitors may have some limitations.
Make sure to use a validated
device, and check that the cuff fits. Bring the monitor with you to your
doctor's office to check its accuracy once a year. Talk to your doctor about
how to start checking your blood pressure at home.
Devices that measure your blood
pressure at your wrist or finger aren't recommended by the American Heart
Association because they can provide less reliable results.
Tests
If you have high blood pressure,
your doctor may recommend tests to confirm the diagnosis and check for
underlying conditions that can cause hypertension.
·
Ambulatory monitoring. This 24-hour blood pressure monitoring test is used to
confirm if you have high blood pressure. The device used for this test measures
your blood pressure at regular intervals over a 24-hour period and provides a
more accurate picture of blood pressure changes over an average day and night.
However, these devices aren't available in all medical centers, and they may
not be reimbursed.
·
Lab tests. Your doctor may recommend a urine test (urinalysis) and
blood tests, including a cholesterol test.
·
Electrocardiogram (ECG or EKG). This quick and painless test measures your heart's
electrical activity.
·
Echocardiogram. Depending on your signs and symptoms and test results,
your doctor may order an echocardiogram to check for more signs of heart
disease. An echocardiogram uses sound waves to produce images of the heart.
Treatment
Changing your lifestyle can help
control and manage high blood pressure. Your doctor may recommend that you make
lifestyle changes including:
·
Eating a heart-healthy
diet with less salt
·
Getting regular physical
activity
·
Maintaining a healthy
weight or losing weight if you're overweight or obese
·
Limiting the amount of
alcohol you drink
But sometimes lifestyle changes
aren't enough. If diet and exercise don't help, your doctor may recommend
medication to lower your blood pressure.
Medications
The type of medication your
doctor prescribes for high blood pressure depends on your blood pressure
measurements and overall health. Two or more blood pressure drugs often work
better than one. Sometimes finding the most effective medication or combination
of drugs is a matter of trial and error.
You should aim for a blood
pressure treatment goal of less than 130/80 mm Hg if:
·
You're a healthy adult
age 65 or older
·
You're a healthy adult
younger than age 65 with a 10% or higher risk of developing cardiovascular
disease in the next 10 years
·
You have chronic kidney
disease, diabetes or coronary artery disease
Ask your doctor what your blood
pressure treatment goal should be. Also, the ideal blood pressure treatment
goal can vary with age and health conditions, particularly if you're older than
age 65.
Medications used to treat high
blood pressure include:
·
Diuretics. Diuretics, sometimes called water pills, are medications
that help your kidneys eliminate sodium and water from the body. These drugs
are often the first medications tried to treat high blood pressure.
There
are different classes of diuretics, including thiazide, loop and potassium
sparing. Which one your doctor recommends depends on your blood pressure
measurements and other health conditions, such a kidney disease or heart
failure. Diuretics commonly used to treat blood pressure include chlorthalidone,
hydrochlorothiazide (Microzide) and others.
A
common side effect of diuretics is increased urination, which could reduce
potassium levels. If you have a low potassium level, your doctor may add a
potassium-sparing diuretic — such as triamterene (Dyazide, Maxide) or
spironolactone (Aldactone) — to your treatment.
·
Angiotensin-converting enzyme (ACE)
inhibitors. These medications
— such as lisinopril (Prinivil, Zestril), benazepril (Lotensin), captopril and
others — help relax blood vessels by blocking the formation of a natural
chemical that narrows blood vessels.
·
Angiotensin II receptor blockers (ARBs). These
medications relax blood vessels by blocking the action, not the formation, of a
natural chemical that narrows blood vessels. ARBs include candesartan
(Atacand), losartan (Cozaar) and others.
·
Calcium channel blockers. These medications — including amlodipine (Norvasc),
diltiazem (Cardizem, Tiazac, others) and others — help relax the muscles of
your blood vessels. Some slow your heart rate. Calcium channel blockers may
work better for older people and people of African heritage than
do ACE inhibitors alone.
Don't
eat or drink grapefruit products when taking calcium channel blockers.
Grapefruit increases blood levels of certain calcium channel blockers, which
can be dangerous. Talk to your doctor or pharmacist if you're
concerned about interactions.
Additional medications sometimes used to treat high blood pressure
If you're having trouble
reaching your blood pressure goal with combinations of the above medications,
your doctor may prescribe:
·
Alpha blockers. These medications reduce nerve signals to blood vessels,
lowering the effects of natural chemicals that narrow blood vessels. Alpha
blockers include doxazosin (Cardura), prazosin (Minipress) and others.
·
Alpha-beta blockers. Alpha-beta
blockers block nerve signals to blood vessels and slow the heartbeat to reduce
the amount of blood that must be pumped through the vessels. Alpha-beta
blockers include carvedilol (Coreg) and labetalol (Trandate).
·
Beta blockers. These medications reduce the workload on your heart and
widen your blood vessels, causing your heart to beat slower and with less
force. Beta blockers include acebutolol, atenolol (Tenormin) and others.
Beta
blockers aren't usually recommended as the only medication you're prescribed,
but they may be effective when combined with other blood pressure medications.
·
Aldosterone antagonists. These drugs also are considered diuretics. Examples are
spironolactone and eplerenone (Inspra). These drugs block the effect of a
natural chemical that can lead to salt and fluid buildup, which can contribute
to high blood pressure. They may be used to treat resistant hypertension.
·
Renin inhibitors. Aliskiren (Tekturna) slows the production of renin, an
enzyme produced by your kidneys that starts a chain of chemical steps that
increases blood pressure.
Due
to a risk of serious complications, including stroke, you shouldn't take
aliskiren with ACE inhibitors or ARBs.
·
Vasodilators. These medications include hydralazine and minoxidil. They
work directly on the muscles in the walls of your arteries, preventing the
muscles from tightening and your arteries from narrowing.
·
Central-acting agents. These
medications prevent your brain from telling your nervous system to increase
your heart rate and narrow your blood vessels. Examples include clonidine
(Catapres, Kapvay), guanfacine (Intuniv) and methyldopa.
Treating resistant hypertension
If your blood pressure remains
stubbornly high despite taking at least three different types of high blood
pressure drugs, one of which usually should be a diuretic, you may have
resistant hypertension.
You're also considered to have
resistant hypertension if you have controlled high blood pressure but are
taking four different types of medications at the same time to achieve that
control. If you do, your doctor should investigate the possibility of a
secondary cause of the high blood pressure.
Having resistant hypertension
doesn't mean your blood pressure will never get lower. If you and your doctor
can determine the cause, a more effective treatment plan can be created to help
you meet your goal blood pressure.
Treating resistant hypertension
may involve many steps, including:
·
Changing your high blood
pressure medications to determine which combinations and doses work best
·
Reviewing all the
medications you take, including those that you take for other conditions or buy
without a prescription
·
Monitoring your blood
pressure at home to see if going to the doctor causes your blood pressure to
increase (white coat hypertension)
·
Making healthy lifestyle
changes, such as eating a healthy diet with less salt, maintaining a healthy
weight and limiting alcohol
You should always take blood
pressure medications as prescribed. Never skip a dose or abruptly stop taking
your blood pressure medication. Suddenly stopping certain blood pressure drugs,
such as beta blockers, can cause a sharp increase in blood pressure (rebound
hypertension).
If you skip doses because you
can't afford the medications, because you have side effects or because you
simply forget to take your medications, talk to your doctor about solutions.
Don't change your treatment without your doctor's guidance.
Potential future treatments
Researchers continue to study
catheter-based ultrasound and radiofrequency ablation of the kidney's
sympathetic nerves (renal denervation) as a treatment for resistant
hypertension. Early studies showed some benefit, but more-robust studies found
that the therapy does not significantly lower blood pressure in people with
resistant hypertension. More research is underway to determine what role, if
any, this therapy may have in treating hypertension.
Lifestyle and home remedies
Lifestyle changes can help you
control and prevent high blood pressure, even if you're taking blood pressure
medication. Here's what you can do:
·
Eat healthy foods. Eat a heart-healthy diet. Try the Dietary Approaches to
Stop Hypertension (DASH) diet, which emphasizes fruits, vegetables, whole
grains, poultry, fish and low-fat dairy foods. Get plenty of potassium, which
can help prevent and control high blood pressure. Eat less saturated fat and
trans fat.
·
Decrease the salt in your diet. Aim
to limit sodium to less than 2,300 milligrams (mg) a day or less. However, a
lower sodium intake — 1,500 mg a day or less — is ideal for most adults.
While
you can reduce the amount of salt you eat by putting down the saltshaker, you
generally should also pay attention to the amount of salt that's in the
processed foods you eat, such as canned soups or frozen dinners.
·
Maintain a healthy weight. Keeping a healthy weight, or losing weight if you're
overweight or obese, can help you control your high blood pressure and lower
your risk of related health problems. In general, you may reduce your blood
pressure by about 1 mm Hg with each kilogram (about 2.2 pounds) of weight you
lose.
·
Increase physical activity. Regular
physical activity can help lower your blood pressure, manage stress, keep your
weight under control and reduce your risk of many health conditions. If you
have high blood pressure, consistent moderate- to high-intensity workouts can
lower your top blood pressure reading by about 11 mm Hg and the bottom number
by about 5 mm Hg.
Aim
for at least 150 minutes a week of moderate aerobic activity or 75 minutes a
week of vigorous aerobic activity, or a combination of moderate and vigorous
activity. For example, try brisk walking for about 30 minutes most days of the
week. Or try interval training, in which you alternate short bursts of intense
activity with short recovery periods of lighter activity. Aim to do
muscle-strengthening exercises at least two days a week.
·
Limit alcohol. Even if you're healthy, alcohol can raise your blood
pressure. If you choose to drink alcohol, do so in moderation. For healthy
adults, that means up to one drink a day for women, and up to two drinks a day
for men. One drink equals 12 ounces of beer, 5 ounces of wine or 1.5 ounces of
80-proof liquor.
·
Don't smoke. Tobacco can injure blood vessel walls and speed up the
process of buildup of plaque in the arteries. If you smoke, ask your doctor to
help you quit.
·
Manage stress. Reduce stress as much as possible. Practice healthy coping
techniques, such as muscle relaxation, deep breathing or mindfulness. Getting
regular physical activity and plenty of sleep can help, too.
·
Monitor your blood pressure at home. Home blood pressure monitoring allows you to keep a daily
log of blood pressure measurements. Your doctor can review the information to
determine if your medication is working or if you're having complications. Home
blood pressure monitoring isn't a substitute for visits to your doctor. Even if
you get normal readings, don't stop or change your medications or alter your
diet without talking to your doctor first.
If
your blood pressure is under control, ask your doctor about how often you need
to check it.
·
Practice relaxation or slow, deep
breathing. Practice taking
deep, slow breaths to help relax. Some research shows that slow, paced
breathing (five to seven deep breaths per minute) combined with mindfulness
techniques can reduce blood pressure. There also are some devices available
that promote slow, deep breathing. According to the American Heart Association,
device-guided breathing may be a reasonable nondrug option for lowering blood
pressure, especially if you have anxiety with high blood pressure or can't
tolerate standard treatments well.
·
Control blood pressure during
pregnancy. Women with high blood pressure should discuss with their
doctors how to control their blood pressure during pregnancy.
Alternative medicine
Although diet and exercise are
the most appropriate tactics to lower your blood pressure, some supplements
also may help lower it. However, more research is needed to determine the
potential benefits. These supplements include:
·
Fiber, such as blond
psyllium and wheat bran
·
Minerals, such as
magnesium, calcium and potassium
·
Folic acid
·
Supplements or products
that increase nitric oxide or widen blood vessels (vasodilators), such as
cocoa, coenzyme Q10, L-arginine and garlic
·
Omega-3 fatty acids,
found in fatty fish, high-dose fish oil supplements and flaxseed
Researchers are also studying
whether vitamin D can reduce blood pressure, but evidence is conflicting. More
research is needed.
While it's best to include these
supplements in your diet as foods, you can also take supplement pills or
capsules. Talk to your doctor before adding any of these supplements to your
blood pressure treatment. Some supplements can interact with medications,
causing harmful side effects, such as an increased bleeding risk that could be
life-threatening.
You can also practice relaxation
techniques, such as deep breathing or mindfulness, to help you relax and reduce
your stress level. These practices may temporarily reduce your blood pressure.
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