Heart murmurs – Symptoms and causes – Mayo Clinic

Heart murmurs can be present at birth (congenital) or develop later in life. Heart murmurs can be harmless (innocent) or abnormal. An innocent heart murmur is not a sign of heart disease and doesn’t need treatment. Abnormal heart murmurs require follow-up testing to determine the cause. Treatment is directed at the cause of your abnormal heart …

https://www.mayoclinic.org/diseases-conditions/heart-murmurs/symptoms-causes/syc-20373171