What Is Heart Rate Variability?
Heart rate variability, commonly referred to as heart rate fluctuation, is a non-invasive monitoring indicator that has received increasing attention in recent years. Specifically, heart rate variability refers to the variation in heartbeat. Heart rate variability is determined by the slight differences between two consecutive heartbeats. Generally, it is measured continuously for 24 hours to reflect the changes and patterns of a patient's heart rate.
1. Heart rate variability refers to the slight differences in the intervals between consecutive heartbeats. It arises from the modulation of the heart's sinoatrial node by the autonomic nervous system, resulting in variations and fluctuations of tens of milliseconds in the intervals between heartbeats.
2. The magnitude of heart rate variability actually reflects the regulatory effect of neurohumoral factors on the sinoatrial node, which in turn reflects the relationship between the autonomic nervous system, sympathetic nerve activity, vagal nerve activity, and their balance and coordination.
3. When vagal nerve activity increases or sympathetic nerve activity decreases, heart rate variability will increase, and vice versa. The analysis methods mainly include appetite, frequency, and nonlinear analysis.
4. Heart rate variability primarily reflects the regulatory information of neurohumoral factors on the cardiovascular system, as well as the ability of sympathetic and vagal nerve activity to regulate the sinoatrial node.
