A normal heartbeat makes two sounds like \"lubb-dupp\" (sometimes described as \"lub-DUP\"), which are the sounds of your heart valves closing.Heart murmurs can be present at birth (congenital) or develop later in life. The valves close and open to let blood flow through the heart's two upper chambers -- called the atria -- and two lower chambers -- the ventricles. What can cause a heart murmur? Heart murmurs are basically abnormal sounds that occur when a person’s heart beats. These changes can be caused by a variety of heart diseases. https://www.heart.org/en/health-topics/heart-murmurs#.T4evW9Vr7To. Any use of this site constitutes your agreement to the Terms and Conditions and Privacy Policy linked below. https://www.heart.org/en/health-topics/heart-valve-problems-and-disease/understanding-your-heart-valve-treatment-options/options-for-heart-valve-replacement. Common congenital defects that cause heart murmurs include: In older children and adults, causes of abnormal heart murmurs include infections and conditions that damage the structures of the heart. Approach to the infant or child with a cardiac murmur. Causes. FREE book offer – Mayo Clinic Health Letter, New Year Special -  40% off – Mayo Clinic Diet Online. Common causes of heart murmurs include: 10 Tips for Living With Atrial Fibrillation, Unexpected Heart Attack Triggers You Should Know, Leaky Heart Valve: Symptoms, Causes, Treatments, Surgery, and More, Surgery to correct heart defects you’re born with, Surgery to correct certain types of heart valve disease, Chest X-rays to see if the heart is enlarged due to heart or valve disease, Echocardiography, which uses sound waves to map the heart's structure. Heart murmurs are extra or unusual sounds made by turbulent blood flowing through the heart. Harmless murmurs may not cause symptoms and can happen when blood flows more rapidly than normal through the heart such as during exercise, pregnancy, or rapid growth in children.” The non-cardiac cause of a heart murmur is typically treated on its own merits. Heart murmurs can be harmless (innocent) or abnormal. https://www.nhlbi.nih.gov/health-topics/heart-valve-disease. What causes heart murmurs in cats? These problems include holes in heart walls or abnormal valves. A single copy of these materials may be reprinted for noncommercial personal use only. AskMayoExpert. A newborn heart murmur may be caused by smaller than normal blood vessels. A heart murmur occurs when there's turbulence in the blood as it flows through the heart. For children, many murmurs go away on their own as children grow. All rights reserved. Innocent cardiac murmur (child). The familiar ‘lub-dub’ sound of the heartbeat is caused by the rhythmic closing of the heart valves as blood is pumped in and out of the chambers. 9th ed. Many heart murmurs are harmless. The murmur is audible as a whooshing or swishing sound that occurs during the normal cycle of the heartbeat. Last year, Andrew Ross, M.D., a 44-year-old gastroenterologist who was accustomed to his role as a health care provider, [...]. If left untreated, it can wear out your heart and lead to heart failure. The "murmur" is the sound of blood flowing. Congenital heart disease diagnosed with echocardiogram in newborns with asymptomatic cardiac murmurs: A systematic review. Heart murmurs can be there at birth (congenital) or can develop later in life. An innocent heart murmur is not a sign of heart disease and doesn't need treatment. These sounds can be heard with a stethoscope. People who have a healthy heart can sometimes have murmurs. 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