A love murmur is a blowing, whooshing, or rasping sound heard throughout a heartbeat. The sound is brought about by turbulent (rough) blood flow through the love valves or close to the heart.

You are watching: A soft blowing sound caused by turbulent blood flow is a


The heart has actually 4 chambers:

Two top chambers (atria)Two reduced chambers (ventricles)

The heart has valves that close through each heartbeat, bring about blood to circulation in just one direction. The valves space located in between the chambers.


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Murmurs can occur for countless reasons, such as:

When a valve does not close tightly and blood leaks backward (regurgitation)When blood flows with a narrowed or stiff love valve (stenosis)
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There room several means in which her health care provider may describe a murmur:

Murmurs room classified ("graded") depending on how loud the murmur sounds through a stethoscope. The grading is ~ above a scale. Grade I deserve to barely it is in heard. An example of a murmur summary is a "grade II/VI murmur." (This means the murmur is class 2 ~ above a scale of 1 to 6).In addition, a murmur is defined by the stage of the heartbeat when the murmur is heard. A heart murmur may be explained as systolic or diastolic. (Systole is as soon as the heart is squeezing the end blood and also diastole is once it is filling up v blood.)

When a murmur is more noticeable, the provider may be able to feel it with the palm the the hand over the heart. This is called a "thrill".

Things the provider will look for in the exam include:

Does the murmur occur when the heart is resting or contracting?Does it critical throughout the heartbeat?Does it readjust when girlfriend move?Can it it is in heard in various other parts of the chest, top top the back, or in the neck?Where is the murmur heard the loudest?

Many heart murmurs space harmless. These varieties of murmurs are called innocent murmurs. They will not cause any type of symptoms or problems. Innocent murmurs do NOT need treatment.

Other heart murmurs may indicate an abnormality in the heart. These abnormal murmurs deserve to be resulted in by:

Pulmonary regurgitation (backflow the blood right into the ideal ventricle, caused by failure of the pulmonary valve to close completely)

Significant murmurs in youngsters are more likely come be caused by:

Anomalous pulmonary venous return (an abnormal formation of the pulmonary veins)

Multiple murmurs may result from a mix of heart problems.

Children frequently have murmurs together a normal part of development. These murmurs do NOT require treatment. They may include:

Pulmonary circulation murmursStill"s murmurVenous hum

A provider deserve to listen to your heart sounds by place a stethoscope on her chest. You will certainly be asked questions about your medical history and symptoms, together as:

Have other family members members had murmurs or various other abnormal love sounds?Do you have actually a family background of heart problems?Do you have actually chest pain, fainting, shortness that breath, or various other breathing problems?Have you had actually swelling, weight gain, or bulging veins in the neck?Does your skin have a bluish color?

The provider might ask you come squat, stand, or organize your breath while bearing down or gripping something v your hands to hear to your heart.

The following tests might be done:


Chest sound - murmurs; love sounds - abnormal; Murmur - innocent; innocent murmur; Systolic love murmur; Diastolic heart murmur


Fang JC, O"Gara PT. Background and physics examination: an evidence-based approach. In: Zipes DP, Libby P, Bonow RO, Mann DL, Tomaselli GF, Braunwald E, eds. Braunwald"s love Disease: A Textbook that Cardiovascular Medicine. 11th ed. Philadelphia, PA: Elsevier; 2019:chap 10.

Goldman L. Approach to the patient with feasible cardiovascular disease. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 45.

Nishimura RA, otto CM, Bonow RO, et al. 2017 AHA/ACC focused update of the 2014 AHA/ACC tip for the monitoring of patients v valvular love disease: a report that the American university of Cardiology/American heart Association Task force on exercise Guidelines. Circulation. 2017;135(25):e1159-e1195. PMID: 28298458 pubmed.ncbi.nlm.nih.gov/28298458/.

Swartz MH. The heart. In: Swartz MH, ed. Textbook of physics Diagnosis: background and Examination. 8 hours ed. Philadelphia, PA: Elsevier; 2021:chap 14.

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Updated by: thomas S. Metkus, MD, Assistant Professor that Medicine and Surgery, Johns Hopkins University institution of Medicine, Baltimore, MD. Additionally reviewed by David Zieve, MD, MHA, clinical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.


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