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Heart rate variability is the time variation between each heartbeat that can show how your body handles stress and recovery.

Measuring heart health isn’t only for those who've had heart failure, but also critical for those with traumatic brain injury (TBI). Heart rate variability is a key measure of heart health. As you ...

Heart rate variability (HRV) is the variation in the time between two consecutive heartbeats over a specific period. Doctors may use HRV as an indicator for certain aspects of a person’s health, ...