Question
Explain heart sounds.
Solution
The cardiac cycle produces a characteristic sound that is usually referred to as the heart sounds. Lub- Dub is referred to as the heart sound.
Lub is the first heart sound. It is associated with the closure of the tricuspid and bicuspid valves at the beginning of a systole.
Dub is the second heart sound. It is associated with the closure of the semilunar valves at the beginning of diastole.
