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Heart Murmur - Definition


A heart murmur is a sound distinct from the heartbeat that is heard during cardiac auscultation. This can be inorganic in origin, that is to say physiological, and be in no way indicative of a heart condition or responsible for any impact on the heart's function. Sometimes, a murmur is the sign of blood passing through a narrowed cardiac valve, indicative of valvular insufficiency. Apart from valve narrowing, another possible cause is blood escaping through a closed valve, which indicates blood flow regurgitation, a type of valvular insufficiency.

If the murmur is considered suspicious, an echocardiogram can be performed to study the cardiac cavities and how they are functioning. Doppler ultrasound enables us to analyze the blood flow through the different valves of the heart.