Mar 15, 2000 Table of Contents

Please note: This information was current at the time of publication. But medical information is always changing, and some information given here may be out of date. For regularly updated information on a variety of health topics, please visit familydoctor.org, the AAFP patient education Web site.

Information from Your Family Doctor

Bacterial Endocarditis: A Heart at Risk

Am Fam Physician. 2000 Mar 15;61(6):1739.

See related article on bacterial endocarditis.

What is bacterial endocarditis?

Bacterial endocarditis (BE) is an infection of the valves and inner lining of the heart. It happens when bacteria from the skin, mouth or intestines enter the bloodstream and infect the heart valves and lining.

Who gets bacterial endocarditis?

Although BE can occur in anyone, people with a heart valve problem, an artificial valve or a heart defect are at greatest risk. Having a heart murmur sometimes increases the chances of getting BE. Your doctor can usually determine whether you have a type of heart murmur that increases your risk of BE.

Do medical or dental procedures increase the risk of BE?

If you have an abnormal heart valve or a heart defect, anything that increases the risk of bacteria getting into the bloodstream increases your risk of getting BE. Dental work is associated with BE. Other medical procedures that might increase the risk of BE are colonoscopy, cystoscopy and sigmoidoscopy.

How can BE be prevented?

Patients who have heart defects or valve problems should receive antibiotics when they have any procedures mentioned above.

How can you tell if you have BE?

Fever, chills and other flu-like symptoms may be the only signs of BE. Other symptoms are unexplained weight loss and weakness. Your doctor may suspect you have BE if he or she hears abnormal heart sounds with a stethoscope. Your doctor will then need to do more tests, such as blood work and echocardiography (looking at the heart by using an ultrasound) to find out if you have BE.

Are there complications of BE?

Once infected, your heart may not pump blood as well as it did before. This is called heart failure. Other problems include irregularities of the heart beat, heart muscle destruction and blood clots and clumps of bacteria that go from the heart to the brain and other organs. If BE isn't treated, it can lead to death.

How is BE treated?

You can take antibiotics to treat BE. Antibiotics are usually started intravenously in the hospital, but many people can finish their treatment at home. For more complicated infections, heart surgery may be needed.

For more information, you can contact the American Heart Association (Web site: http://www.americanheart.org). The toll-free number is 1-800-AHA-USA1 (1-800-242-8721).


This handout is provided to you by your family doctor and the American Academy of Family Physicians. Other health-related information is available from the AAFP online at http://familydoctor.org.

This information provides a general overview and may not apply to everyone. Talk to your family doctor to find out if this information applies to you and to get more information on this subject.

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