Which Korotkoff phase is defined by the first appearance of clear tapping sounds corresponding to systolic pressure?

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Multiple Choice

Which Korotkoff phase is defined by the first appearance of clear tapping sounds corresponding to systolic pressure?

Explanation:
In auscultatory BP measurement, Korotkoff sounds come in separate phases as you release the cuff. The first clear tapping you hear occurs when the cuff pressure has fallen to the systolic level, allowing the artery to open briefly with each heartbeat and producing turbulent flow that is audible with a stethoscope. That moment marks the systolic blood pressure and is heard as the initial tapping, which is why this phase is identified as the first phase. As you continue to deflate, the sounds change through subsequent phases until they eventually disappear, which corresponds to the diastolic pressure.

In auscultatory BP measurement, Korotkoff sounds come in separate phases as you release the cuff. The first clear tapping you hear occurs when the cuff pressure has fallen to the systolic level, allowing the artery to open briefly with each heartbeat and producing turbulent flow that is audible with a stethoscope. That moment marks the systolic blood pressure and is heard as the initial tapping, which is why this phase is identified as the first phase. As you continue to deflate, the sounds change through subsequent phases until they eventually disappear, which corresponds to the diastolic pressure.

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