Electrocardiogram Measurement during Overnight Sleep using Smart-wear

Abstract

Sleep quality is important for maintaining good health. However, many people are not satisfied with their quality of sleep. As a decline in sleep quality leads to a deterioration in attention and concentration during the day, the evaluation of sleep quality in daily life is necessary to improve sleep quality. In our previous works, smart-wear that could measure the electrocardiogram (ECG) in daily life was developed. The purpose of the present study is to measure the ECG during overnight sleep by using the smart-wear in order to evaluate sleep quality. The ECG of 15 healthy males was measured for 8 h during overnight sleep and stored on their smartphone. After the experiment, the measured ECG was evaluated by visual confirmation of R peaks at intervals of 60 s. The results show that the R peaks can be observed at 79.9 ± 10.5 % during overnight sleep.