As a medical professional with a background in cardiology, I can tell you that a heart murmur can indeed be serious, but it can also be completely harmless. Heart murmurs are sounds made by the turbulence of blood flowing through the heart. Not all murmurs indicate a problem with the heart. Some are innocent or functional and are found in people with a completely normal heart. These are usually soft and do not require any treatment.

However, some heart murmurs can be a sign of an underlying heart condition, such as a valve problem, a hole in the heart, or a more serious issue like heart failure.
Pathological murmurs are typically louder and can be accompanied by other symptoms like shortness of breath, chest pain, or fatigue. When a murmur is suspected to be pathological, further diagnostic tests such as an echocardiogram are often required to determine the cause and the appropriate course of action.

It's important to have any heart murmur evaluated by a healthcare professional to determine its nature and whether it requires medical attention.

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A person with an innocent murmur has a normal heart. ... An abnormal heart murmur is more serious. In children, abnormal murmurs are usually caused by congenital heart disease. In adults, abnormal murmurs are most often due to acquired heart valve problems.read more >>