Which sound represents the second, soft tapping noise during heartbeats?

The second, soft tapping noise during heartbeats corresponds to the diastolic reading. This sound is produced when the heart is relaxing and filling with blood, which occurs between heartbeats. During this phase, the heart's valves are closed, which contributes to the sound that is auscultated using a stethoscope.

In the context of blood pressure measurements, the diastolic reading is critical as it indicates the pressure in the arteries when the heart is at rest between beats. It reflects how well the body is able to maintain a steady and adequate blood flow while the heart is not actively pumping.

The other terms do not accurately describe this soft tapping sound associated with the heart's functioning. For instance, the systolic reading refers to the pressure in the arteries when the heart beats, specifically when it is contracting to pump blood. Peristaltic reading relates to digestive system movements rather than heart sounds. Vascular reading is not a standard term used in this context. Therefore, understanding the phases of the cardiac cycle and their associated sounds is crucial for recognizing the significance of the diastolic reading.