Myocarditis is an inflammation of the heart’s wall. It is rare and can be very serious. For some it may not cause symptoms.
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The cause is not always known. Causes that are known fall into one of the following categories:
There are no known risk factors.
Myocarditis may not cause symptoms. Those that do appear are related to the cause and severity. Symptoms may build slowly or come on fast. Some common symptoms include:
Myocarditis can lead to heart failure.
It can be hard to diagnosis myocarditis. There is no specific test for it. Many other causes of heart problems must be ruled out first.
Your doctor will ask about your symptoms and health history. A physical exam will be done. Tests may include:
Tests will let the doctor get images of the heart include:
The first line of treatment is support care. A care plan will help to manage your symptoms and sow or prevent further damage. Care will often require a hospital stay.
When possible the cause will be treated. For example:
Medicine can help to support the heart if heart failure is present. These include:
Severe heart damage may require a cardiac transplant. A donor heart will replace the damaged heart.
It is not possible to avoid all myocarditis. To decrease risk of infection that could lead to myocarditis:
American Heart Association
National Heart, Lung, and Blood Institute
Heart and Stroke Foundation of Canada
Brady WJ, Ferguson JD, et al. Myocarditis: emergency department recognition and management. merg Med Clin North Am. 2004;22(4):865-885.
Causes and risks of heart failure. American Heart Association website. Available at: http://www.heart.org/HEARTORG/Conditions/HeartFailure/UnderstandYourRiskforHeartFailure/Understand-Your-Risk-for-Heart-Failure_UCM_002046_Article.jsp#.WiAtp1WnFQI. Updated May 8, 2017. Accessed November 30, 2017.
Feldman AM, McNamara D. Myocarditis. N Engl J Med. 2000;343(19):1388-1398.
Felker GM, Thompson R, Hare JM et al. Underlying causes and long-term survival in patients with initially unexplained cardiomyopathy. N Engl J Med. 2000;342(15):1077-1084.
Myocarditis. EBSCO DynaMed Plus website. Available at:http://www.dynamed.com/topics/dmp~AN~T114167/Myocarditis. Updated September 5, 2017. Accessed November 30, 2017.
Last reviewed November 2017 by EBSCO Medical Review Board Michael J. Fucci, DO, FACC Last Updated: 8/22/2018