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Heart murmur causes. An innocent heart murmur can be caused by anemia, fever, hyperthyroidism or pregnancy. This type of murmur often disappears over time. An ... Heart murmurs · Overview. Heart murmurs are sounds — such as whooshing or swishing — made by rapid, choppy (turbulent) blood flow through the heart. · Symptoms. A heart murmur is the most common reason that children are referred to our cardiology clinic. There are two type of murmurs: innocent and pathologic. A heart murmur is an extra sound that the blood makes as it flows through the heart. Your doctor uses a stethoscope to listen to your heartbeat. A noise heard in the heart during examination with a stethoscope. Such a murmur may indicate that there is something wrong with the heart. Most heart murmurs in well-developed children are harmless. In adults, heart abnormalities may cause chest pain, and heart failure with symptoms of shortness of ... Heart murmurs are very common, occurring in up to 70% of kids by the time they are school age. Most murmurs are not a cause for concern and do not affect a ... Feb 26, 2019 ... An abnormal heart murmur is more serious. In children, abnormal murmurs are usually caused by congenital heart disease. In adults, abnormal ... Approximately 51.6% of neonates with heart murmur had congenital heart disease and only in 48.4% the murmur was innocent. Most heart murmurs in children are benign and don't need treatment or follow up. If your child has an abnormal heart murmur that's caused by another heart ...