While performing a manual blood pressure measurement on a middle-aged patient, you notice the needle on the sphygmomanometer starts to move when you slowly release the pressure on the bulb. At what point should you record the systolic pressure?
As soon as the needle on the gauge begins to fluctuate
When you first hear a clear tapping sound through the stethoscope
When the tapping sound heard through the stethoscope become muffled
After the needle on the sphygmomanometer has stopped moving