The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves.

Question

Quizplus · Accepted Answer

The "lub" sound, also known as the first heart sound (S1), is associated with the closure of the mitral and tricuspid valves, not the pulmonary and aortic valves. The "dub" sound (S2) is related to the closure of the aortic and pulmonary valves.

The "Lub" Sounds of the Heart Are Valuable in Diagnosis