what is the reason for the sound Lub Dub in the heart beat
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Explanation:
Normal heart sounds can be characterized by a "lub" "dub" that occurs with a heart beat. The first heart sound (lub) occurs when the atrioventricular (AV) valves close and the second heart sound (dub) is heard when the semilunar valves close...
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The first heart sound (lub) occurs when the atrioventricular (AV) valves close and the second heart sound (dub) is heard when the semilunar valves close.
it is simply said to be opening or closing of aritoventricular valves
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