"Blood pressure" is the force of blood pushing against the walls of the arteries as the heart pumps blood. If this pressure rises and stays high over time, it can damage the body in many ways.
About 1 in 3 adults in the United States has HBP. The condition itself usually has no signs or symptoms. You can have it for years without knowing it. During this time, though, HBP can damage your heart, blood vessels, kidneys, and other parts of your body.
Knowing your blood pressure numbers is important, even when you're feeling fine. If your blood pressure is normal, you can work with your health care team to keep it that way. If your blood pressure is too high, treatment may help prevent damage to your body's organs.
Blood pressure is measured as systolic (sis-TOL-ik) and diastolic (di-ah-STOL-ik) pressures. "Systolic" refers to blood pressure when the heart beats while pumping blood. "Diastolic" refers to blood pressure when the heart is at rest between beats.
You most often will see blood pressure numbers written with the systolic number above or before the diastolic number, such as 120/80 mmHg. (The mmHg is millimeters of mercury—the units used to measure blood pressure.)
The table below shows normal blood pressure numbers for adults. It also shows which numbers put you at greater risk for health problems.
|Normal||Less than 120||And||Less than 80|
|High blood pressure|
|Stage 2||160 or higher||Or||100 or higher|
The ranges in the table apply to most adults (aged 18 and older) who don't have short-term serious illnesses.
Blood pressure doesn't stay the same all the time. It lowers as you sleep and rises when you wake up. Blood pressure also rises when you're excited, nervous, or active. If your numbers stay above normal most of the time, you're at risk for health problems. The risk grows as blood pressure numbers rise. "Prehypertension" means you may end up with HBP, unless you take steps to prevent it.
If you're being treated for HBP and have repeat readings in the normal range, your blood pressure is under control. However, you still have the condition. You should see your doctor and follow your treatment plan to keep your blood pressure under control.
Your systolic and diastolic numbers may not be in the same blood pressure category. In this case, the more severe category is the one you're in. For example, if your systolic number is 160 and your diastolic number is 80, you have stage 2 HBP. If your systolic number is 120 and your diastolic number is 95, you have stage 1 HBP.
If you have diabetes or chronic kidney disease, HBP is defined as 130/80 mmHg or higher. HBP numbers also differ for children and teens. (For more information, go to "How Is High Blood Pressure Diagnosed?")
Blood pressure tends to rise with age. Following a healthy lifestyle helps some people delay or prevent this rise in blood pressure.
People who have HBP can take steps to control it and reduce their risk for related health problems. Key steps include following a healthy lifestyle, having ongoing medical care, and following your treatment plan.
Myth-busting blood pressure - a hypertension Google+ hangout in honor of World Hypertension Day
Clinical trials are research studies that explore whether a medical strategy, treatment, or device is safe and effective for humans. To find clinical trials that are currently underway for High Blood Pressure, visit www.clinicaltrials.gov.
November 18, 2013
Renal artery stents lead to similar outcome versus medication-only
A commonly used stenting procedure to treat plaque build-up in the renal artery appears to offer no significant improvement when added to medication-based therapy, according to results from a National Institutes of Health-funded study. The narrowing and hardening of one or both renal arteries, known as renal artery stenosis, occurs in 1 to 5 percent of people who have high blood pressure, or hypertension.
The Heart Truth®—a national heart disease awareness campaign for women—is sponsored by the NHLBI. The campaign's goal is to give women a personal and urgent wakeup call about their risk for heart disease.
Every woman has a story to tell and the power to take action to protect her heart health. Share your story with other women on Facebook.
The Heart Truth campaign offers a variety of public health resources to help educate women and health professionals about women’s heart disease.
Learn more about key campaign events, activities, and resources at www.hearttruth.gov.
November 20, 2013
Gary H. Gibbons
New NHLBI Program Trains Scientists to Bring More Science Out of the Lab and into the Patient Care Marketplace
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.