What is the timescale of the interbeat interval?

The interbeat interval refers to the time between successive heartbeats, commonly measured in milliseconds. This measurement is crucial in understanding heart rate variability and other cardiovascular functions. The heart can beat very rapidly, especially during exercise or in response to stress, making milliseconds a more appropriate unit of measurement than seconds, minutes, or hours, which would not accurately represent the short duration between heartbeats. Therefore, understanding the interbeat interval is essential for those studying biofeedback and cardiovascular health, as it allows for precise monitoring of heart rate dynamics and the assessment of autonomic nervous system function.