Phase IV of Korotkoff sounds is associated with what?

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Multiple Choice

Phase IV of Korotkoff sounds is associated with what?

Explanation:
Phase IV is the point where the Korotkoff sounds become muffled as the cuff pressure falls further. As you deflate the cuff, the sequence goes: the first tapping marks systolic pressure (Phase I), a murmur appears (Phase II), tapping becomes crisper (Phase III), and then it softens into muffled sounds (Phase IV). The sounds usually disappear entirely at Phase V, which is typically used to identify diastolic pressure. So muffling corresponds to Phase IV, not the first tapping or the disappearance.

Phase IV is the point where the Korotkoff sounds become muffled as the cuff pressure falls further. As you deflate the cuff, the sequence goes: the first tapping marks systolic pressure (Phase I), a murmur appears (Phase II), tapping becomes crisper (Phase III), and then it softens into muffled sounds (Phase IV). The sounds usually disappear entirely at Phase V, which is typically used to identify diastolic pressure. So muffling corresponds to Phase IV, not the first tapping or the disappearance.

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