A heart murmur is a blowing, whooshing, or rasping sound heard during a heartbeat. The sound is caused by turbulent (rough) blood flow through the heart valves or near the heart.
Chest sounds - murmurs; Heart sounds - abnormal; Murmur - innocent; Innocent murmur; Systolic heart murmur; Diastolic heart murmur
The heart has 4 chambers:
The heart has valves that close with each heartbeat, causing blood to flow in only one direction. Two of the valves are located between the chambers (mitral and tricuspid). The other two valves (aortic and pulmonic) are located at the exit from the heart chambers into the aorta and pulmonary artery, respectively.
Murmurs can happen for many reasons, such as:
There are several ways in which your health care provider may describe a murmur:
When a murmur is more noticeable, the provider may be able to feel it with the palm of the hand over the heart. This is called a "thrill" and means the murmur is grade 4 or higher.
Things the provider will look for in the exam include:
Many heart murmurs are harmless. These types of murmurs are called innocent murmurs. They will not cause any symptoms or problems. Innocent murmurs do not need treatment.
Other heart murmurs may indicate an abnormality in the heart. These abnormal murmurs can be caused by:
Significant murmurs in children are more likely to be caused by:
Multiple murmurs may result from a combination of heart problems.
Children often have murmurs as a normal part of development. These murmurs do not need treatment. They may include:
A provider can listen to your heart sounds by placing a stethoscope on your chest. You will be asked questions about your medical history and symptoms, such as:
The provider 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:
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Review Date:
5/8/2024 Reviewed By: Thomas S. Metkus, MD, Assistant Professor of Medicine and Surgery, Johns Hopkins University School of Medicine, Baltimore, MD. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. |