• A Heart murmur results from turbulent blood flow.

  • A complete history and physical examination are most important for evaluating a cardiac murmur.

  • The intensity of a murmur does not necessarily reflect the severity of abnormality.

  • Innocent murmurs are systolic, less than grade 3 in intensity, and louden when the patient moves from an upright position to a supine position.

  • Electrocardiography and echocardiography are usually performed to define the cause of a pathological murmur.

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