A member asked:

What causes the lubb dupp sounds that you hear when you listen to your heart through a stethoscope?

A doctor has provided 1 answer

Heart sounds: The first heart sound is caused by vibrations of the mitral valve and decelerating blood when the valve closes. The second heart sound is caused by the closure of the aortic and pulmonary valves and their associated blood columns.

Answered 12/1/2014

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