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CGP EDU Academic Team
Published on: August 13, 2026
The first heart sound is associated with :-
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The first heart sound which we hear is produced by the simultaneous closure of both the atrioventricular valves namely, the bicuspid (mitral) valve and the tricuspid valve. It resembles the word "LUBB" and is produced due to the isometric contraction period and the earlier part of ejection period.
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