Aortic regurgitation is a heart condition in which the valve between the left ventricle (lower left heart chamber) and the aorta (the major blood vessel leaving the heart) is not working properly. This valve defect allows the pumped out blood to leak back into the heart. As a result, the left ventricle must work harder to pump more blood than normal. This increased work gradually causes the left ventricle to enlarge. There are two main types of aortic regurgitation:
Aortic Valve Regurgitation
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Possible structural causes of aortic regurgitation:
A risk factor is something that increases your chance for getting a disease or condition.
Risk factors for developing acute aortic regurgitation include:
Risk factors for developing chronic aortic regurgitation include:
In acute aortic regurgitation, symptoms come on quickly since the heart has not had the time to compensate or enlarge. In chronic aortic regurgitation, symptoms develop more gradually and may not be noticed for years until the condition worsens.
In both cases, symptoms may include:
The doctor will ask about your symptoms and medical history. A physical exam will be done. In particular, the doctor will use a stethoscope to listen for a murmur (an abnormal heart sound). If you have a certain type of heart murmur, the doctor may suspect that you have aortic regurgitation and may recommend further tests, such as:
In the case of severe acute aortic regurgitation, especially due to trauma, immediate surgery may be needed.
For chronic aortic regurgitation, the proper timing of medical therapy versus surgical treatment depends on several factors. These include:
Treatment for aortic regurgitation may include:
If aortic regurgitation is not causing symptoms and heart function remains normal, you may be treated with medications that lower blood pressure. These medications may reduce the pressure against which the heart pumps. Medication may also be given to treat chest pain, to treat irregular heartbeats, to prevent infection of damaged or artificial valves, and to prevent blood clots. If you have heart failure, you may be treated with medications that help your heart pump more effectively.
Surgery is usually performed for severe acute aortic regurgitation or when the timing is right for chronic aortic regurgitation. If you have chronic aortic regurgitation, your doctor will follow your symptoms and heart function closely in order to determine the best surgical timing for you. Surgery involves replacing the aortic valve.
Prompt treatment of strep infections can prevent rheumatic fever, which is a risk factor for developing heart valve problems like aortic regurgitation. If you have an abnormal valve, you are at higher risk of developing valve infections. You should talk with your doctor to understand when you may need to take antibiotics to decrease your risk of valve infection. For instance, you may need antibiotics before undergoing certain dental procedures or surgeries.
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American Heart Associationhttp://www.heart.org
National Heart Lung and Blood Institutehttp://www.nhlbi.nih.gov
Canadian Cardiovascular Societyhttp://www.ccs.ca
Canadian Family Physicianhttp://www.cfp.ca/
Aortic regurgitation. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamedUpdated October 10, 2012. Accessed November 7, 2012.
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Tarasoutchi F, et al. Symptoms, left ventricular function, and timing of valve replacement surgery in patients with aortic regurgitation.
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