brid3536 brid3536

03-02-2022
Health

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Why does the first heart sound occur after the qrs complex?.

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arayahes arayahes

03-02-2022

Answer:

QRS represents ventricular depolarization. This depolarization initiates ventricular contraction which closes the mitral and tricuspid valves. It is the closure that is heard as the first heart sound.

Explanation:

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