What does the second sound heard when measuring blood pressure represent?

When measuring blood pressure using a sphygmomanometer, the second sound that is heard corresponds to the diastolic pressure. Blood pressure readings consist of two key components: systolic pressure and diastolic pressure.

The first sound that is detected through the stethoscope signifies the systolic pressure, which occurs when the heart beats and pumps blood into the arteries, creating the highest pressure in the bloodstream. As the cuff is gradually deflated, the sounds continue until a point where the sounds change; this transition corresponds to the second sound, which signifies the diastolic pressure. Diastolic pressure is the lowest pressure within the arteries that occurs when the heart is at rest between beats, filling with blood.

Understanding these components is crucial for comprehending cardiovascular health and for accurately interpreting blood pressure measurements. The option reflects an important aspect of blood pressure assessment, making it essential knowledge for a medication aide.