Study on the Value of Long-Term Wearable Dynamic ECG Monitor for Determining the Balance of Yin-Yang Based on Circadian Rhythm of Autonomic Nerves

  OBJECTIVE  To evaluate the feasibility of the long-term wearable dynamic ECG monitor as a mean to determine the balance of yin and yang in the human body by analyzing the relationship between the circadian rhythm of autonomic nerves and yin-yang.

  METHODS  A total of 30 healthy volunteers were selected, and a long-term wearable dynamic ECG monitor was placed on their chests for 48 h to complete simultaneous monitoring. In addition, heart rate variability indicators the standard deviation of normal-to-normal intervals (SDNN), the index of the standard deviation of normal-to-normal intervals (SDNN index), the percentage of differences exceeding 50 ms between adjacent normal number of intervals (pNN50) and frequency domain parameters low frequency power (LF), high frequency power (HF), low frequency/high frequency ratio (LF/HF) were used to observe the circadian rhythm changes and analyze the relationship between yin and yang.

  RESULTS  The heart rate variability indicators showed circadian variations, and reflected the circadian rhythm in the human body. SDNN, SDNN index, pNN50 and HF were higher at nighttime than at daytime, and the differences were statistically significant (P < 0.05). However, LF/HF was higher at daytime than at nighttime, and the differences were statistically significant (P < 0.05).

  CONCLUSION  The long-term wearable dynamic ECG monitor can reflect the dynamic changes of autonomic nerves by monitoring and analyzing the heart rate variability, so as to evaluate the balance relationship between yin and yang in the human body.