Published: November 17, 2022 | Updated: July 20, 2023
A heart murmur is a sound that can be heard via stethoscope. These whooshing or swishing sounds are caused when blood flow is turbulent as it moves through the heart. A normal heartbeat makes a “lubb-dupp” sound as the valves close, but a heart murmur sounds different. A systolic murmur begins during or after the first heart sound (lubb) and ends before the second (dupp). This differs from a diastolic murmur, which occurs when the cardiac muscle relaxes between beats. Systolic murmur may be congenital or acquired.
There are two types of systolic murmur:
There are seven clinical features in all systolic murmurs:
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Some people who have heart murmurs don’t have noticeable symptoms. Depending on the cause of the heart murmur, the patient may have:
Innocent heart murmur doesn’t require treatment. Abnormal heart murmurs often are addressed pharmacologically.