Appointments

866.320.4573

Request an Appointment

Questions

800.223.2273

Contact us with Questions

Expand Content

Heart Murmur

During a physical exam, your doctor listens to your heart with a stethoscope.

Normal heart sounds

The doctor listens to your heart at different places on your chest to hear the sounds your heart valves make as blood travels through your heart. Normally, the heart beat has two sounds – lub-dub. The first sound is heard as the mitral and tricuspid valves close. The second heart sound is the aortic and pulmonic valves snapping shut.

Heart murmur

A heart murmur is a swishing sound heard when there is turbulent or abnormal blood flow across the heart valve.

Causes of heart murmurs

Valvular heart disease is the most common cause of a heart murmur

  • Valve stenosis – a narrow, tight, stiff valve, limiting forward flow of blood.
  • Valve regurgitation – a valve that does not close completely, allowing backward flow (a "leaky" valve)

The abnormal changes to the valve cause the abnormal heart sound (murmur).

Other causes of heart murmurs include:
  • Hypertrophic cardiomyopathy
  • Septal defect

Functional causes for heart murmurs

Murmurs can be caused by increased blood flow across the valve related to other medical conditions without valvular heart disease, such as:

  • Anemia
  • Hyperthyroidism

Innocent murmurs

Murmurs can be present without any medical or heart conditions. Two common examples include:

  • Childhood murmurs
  • Pregnancy

Important information about heart murmurs

It is important to have regular physical exams to detect any abnormal heart sounds. If a murmur is heard, further evaluation will be required to determine why the murmur is present, which valve is involved, and the severity of the problem.

If the murmur is due to a heart valve problem:
  • Follow-up with a cardiologist will be required to evaluate the progression of the valve disease.
  • Most people who have a heart murmur require measures to prevent valve infection. These include:
    • Tell all your doctors and dentist you have valve disease
    • Call your doctor if you have symptoms of an infection
    • Take good care of your teeth and gums
    • Take antibiotics before you undergo any procedure that may cause bleeding
    • A wallet card may be obtained from the American Heart Association with specific antibiotic guidelines. Call your local American Heart Association office or nationally, 800.AHA.USA1 or go to www.heart.org/HEARTORG..*

For more information

* a new browser window will open with this link. The inclusion of links to other web sites does not imply any endorsement of the material on the web sites or any association with their operators

Reviewed: 10/12

Talk to a Nurse: Mon. - Fri., 8:30 a.m. - 4 p.m. (ET)

Call a Heart & Vascular Nurse locally 216.445.9288 or toll-free 866.289.6911.

Schedule an Appointment

Toll-free 800.659.7822

This information is provided by Cleveland Clinic and is not intended to replace the medical advice of your doctor or health care provider. Please consult your health care provider for advice about a specific medical condition.

© Copyright 2014 Cleveland Clinic. All rights reserved.

HealthHub from Cleveland Clinic

Read the Latest from Our Experts About cctopics » Heart & Vascular Health
Alcohol May Cause You to Develop Irregular Heartbeat
10/30/14 1:45 p.m.
Even in moderation, alcohol may be hard on your heart. A new study finds that having as little as one to three alcoholic drinks each day may increase your risk for atrial f...
by Heart & Vascular Team
You’ve Been Diagnosed with Esophageal Cancer: Now What? (Video)
10/29/14 8:14 a.m.
If you or a loved one has been diagnosed with cancer of the esophagus, the muscular tube that connects our thro...
10 Tips for Lowering Your Cholesterol
10/27/14 10:10 a.m.
We all want to be heart-healthy, and ensuring healthy levels of cholesterol — a fat, or lipid, carried through ...
Recipe: Low-Cal Chocolate-Walnut Biscotti
10/24/14 4:00 p.m.
Getting back into baking now that the weather has turned crisp once again? Try our chocolate-walnut biscotti. T...
Why Your Low-T Medications May Not Be Safe
10/23/14 8:31 a.m.
If you’re taking a medication for low testosterone to ward off the effects of aging – such as decreased l...