A heart murmur is a blowing, whooshing, or rasping sound heard during a heartbeat. The sound is caused by rough blood flow through the heart valves or near the heart.
The heart has four chambers:
The heart has valves that close with each heartbeat, causing blood to flow in only one direction. The valves are located between the chambers.
Murmurs can happen for many reasons, such as:
There are several ways in which your doctor may describe a murmur:
When a murmur is more prominent, the doctor may be able to feel it with the palm of the hand over the heart.
The doctor will take the following into consideration when examining you:
Many heart murmurs are harmless. These types of murmur are called innocent murmurs. They will not cause any symptoms or problems. Innocent murmurs do not need treatment.
Significant murmurs can be caused by:
Significant murmurs in children are more likely to be caused by:
Children often have murmurs as a normal part of development. These murmurs do not require treatment, and may include:
A doctor or nurse can listen to your heart sounds using a tool called a stethoscope, which is placed over your chest. You will be asked questions about your medical history and symptoms, such as:
The doctor may ask you to squat, stand, or hold your breath while bearing down or gripping something with your hands to listen to your heart.
The following tests may be done:
Chest sounds - murmurs; Heart sounds - abnormal; Murmur - innocent; Innocent murmur; Systolic heart murmur; Diastolic heart murmur
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Sabatine MS, Cannon CP. The history and physical examination:an evidence-based approach. In: Bonow RO, Mann DL, Zipes DP, Libby P, eds. Braunwald'sHeart Disease: A Textbook of Cardiovascular Medicine. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 12.
Bonow RO, Carabello BA, Chatterjee K, de Leon AC Jr., Faxon DP, Freed MD, et al. 2006 Writing Committee Members; American College of Cardiology/American Heart Association Task Force. 2008 Focused update incorporated into the ACC/AHA 2006 guidelines for the management of patients with valvular heart disease: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (Writing Committee to Revise the 1998 Guidelines for the Management of Patients with Valvular Heart Disease): endorsed by the Society of Cardiovascular Anesthesiologists, Society for Cardiovascular Angiography and Interventions, and Society of Thoracic Surgeons. Circulation. 2008;118:e523-e661.
Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Michael A. Chen, MD, PhD, Assistant Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.
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