heart sounds

heart sounds

The "lubb" sound is produced by the closing of the Atrioventricular (Bicuspid and Triscuspid) valves , while the "dupp" sound is produced by the closing of the Semilunar (Aortic and Pulmonary) valves.

Lup and dup, or lupp and dupp, and sometimes also called lubb and dupp are the heart sounds. They are produced when the two different types of valves in the heart close, the atrioventriculars and the semilunars.

makes two sounds, "lubb" when the valves between the atria and ventricles close, and "dupp" when the valves between the ventricles and the major arteries close