What is the normal HRV value?

HRV usually refers to heart rate variability. Under normal circumstances, the normal values of heart rate variability are influenced by multiple factors. In 24-hour analysis, the normal values are approximately (141±39) ms for short-term variation, (127±35) ms for long-term variation, and (27±12) ms for root mean square of successive differences (RMSSD). If abnormal values are detected, timely medical consultation is recommended. The detailed explanation is as follows:

Heart rate variability refers to small fluctuations in the time intervals between heartbeats, reflecting the regulatory capacity of the autonomic nervous system over cardiac activity. Normally, the reference values for heart rate variability are not fixed but vary according to multiple factors such as age, gender, physical condition, and lifestyle habits. In 24-hour Holter monitoring analysis, normal heart rate variability is typically assessed using several key parameters. Short-term variation reflects heart rate fluctuations over brief periods, with a normal range of approximately (141±39) ms. Long-term variation measures heart rate fluctuations over extended periods, with a normal value around (127±35) ms. Additionally, RMSSD is another important parameter, representing the square root of the mean squared differences between successive RR intervals, with a normal value of (27±12) ms.

Variations in these values can provide crucial information about cardiac health. A reduced heart rate variability may indicate diminished autonomic regulation of the heart and could be associated with an increased risk of cardiovascular diseases. Therefore, understanding and monitoring normal heart rate variability values are significant for maintaining cardiovascular health.