Screening And Examination Test 1 Practice

Korotkoff sounds indicate which aspects of a blood pressure reading?

The last sound is systolic and the first is diastolic They indicate heart rate The first sound is systolic and the last is diastolic They indicate respiratory rate

Correct Answer:

The first sound is systolic and the last is diastolic

Explanation:

Korotkoff sounds are used to read blood pressure during cuff deflation. When the cuff pressure falls to the level where the artery just opens and turbulent flow begins, the first tapping sound appears. This marks systolic blood pressure. As the cuff continues to deflate, these sounds continue until the last audible sound is heard, at which point the artery is fully open and the sounds disappear; that pressure corresponds to diastolic blood pressure. So the first sound indicates systolic pressure, and the last audible sound indicates diastolic pressure. This is not about heart rate or respiratory rate, which is why the other choices don’t fit.

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