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CGP EDU Academic Team
Published on: August 14, 2026
The 'Lubb' and "Dup" heart sound are due to :-
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During each cardiac cycle, two prominent sounds are produced, which can easily heard through a stethoscope. The first heart sound (lubb) is associate with the closure of the tricuspid and bicuspid valves, whereas the second he sound (dubb) is associated with the closure of the semilunar valves. These sounds are of clinical diagnostic significance.
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