Collation of Different Sleep Pattern and Their Heart Rate Variability in Healthy Individuals

Heart Rate variability (HRV) is a powerful non-invasive tool which can be used to detect the status of cardio-autonomic function. Its analysis gives information about the cardiac health status. In this study we tried to find out what is impact of different sleep patterns of healthy individuals on their respective heart rate variability.

To assess the relationship between sleep duration along with its quality and autonomic function in healthy adult individual. The Pittsburgh Sleep Quality Index (PSQI) was used to assess sleep duration & its quality. Heart Rate Variability (HRV) was used as non-invasive indicator of autonomic function to examine the influence of sleep.

Cross-sectional and experimental study on the effect of sleep duration along with its quality on autonomic nervous activity.

Apparently healthy individuals without any systemic and sleep disorder were included. Individual divided on the basis of sleep duration and its quality into 3 groups: Normal sleepers with good quality (N=20), Short sleepers with poor quality(N=20), & Long sleepers with good quality(N=20).

We examined the subjective sleep duration and quality (efficiency, latency, awakening, medication) by the Pittsburgh Sleep Quality Index (PSQI). Time, Geometric and Frequency domain measures were calculated on supine 5-minute measurements of ECG.

Time domain measures like STDHR, SDNN, TINN and RRTri significantly reduced in the long and short sleepers as compared to the normal sleepers. Frequency domain measures VLF, HF, Total power were also reduced in short & long sleepers.

From this study we conclude that the sleep duration along with its quality is associated with the autonomic nervous function. HRV was significantly altered in individuals with long and short sleep duration. This shows alteration in autonomic nervous system activity found in long and short sleepers in healthy individuals.