What are Korotkoff sounds indicative of?

Korotkoff sounds are critical auditory phenomena that are heard during the measurement of blood pressure using a sphygmomanometer. These sounds, which are produced by the turbulent blood flow in the arteries, help healthcare professionals determine the systolic and diastolic pressures in an individual.

When a blood pressure cuff is inflated around the arm, it temporarily occludes the blood flow in the brachial artery. As the cuff is slowly deflated, the pressure in the cuff decreases, and at a certain point, blood begins to flow again, producing the first Korotkoff sound. This sound marks the systolic blood pressure. As the cuff continues to be deflated, additional sounds occur that provide further information about the pressure changes until a point is reached where no sounds can be heard, indicating diastolic pressure.

Thus, Korotkoff sounds are directly indicative of blood pressure changes, making this choice the most accurate and relevant in the context of this question. Understanding Korotkoff sounds is essential for accurately assessing an individual's blood pressure, which is a vital sign reflecting cardiovascular health.