How many are true for first heart sound LUBB
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Explanation:
Normally, two distinct sounds are heard through the stethoscope: a low, slightly prolonged “lub” (first sound) occurring at the beginning of ventricular contraction, or systole, and produced by closure of the mitral and tricuspid valves, and a sharper, higher-pitched “dup” (second sound), caused…
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Yes the first heart sound is LUBB the Next one is DUBB
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