Study of Heart Rate Variability during Gated Respiration
| Autor: | Wei Lu, 盧巍 |
|---|---|
| Rok vydání: | 2017 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 105 The aim of the study is to observe how gated respiration affects the Autonomic nervous system (ANS). In our study, we develop a Photo plethysmography (PPG) device to record a pulse pressure waveform (a physiology signals) for ten minutes from total 32 (16 male and 16 female) healthy subjects. Within the testing ten minutes, subjects follow inhalation and exhalation rhythm provided by an APP. The recorded PPG pulse signal will be processed and extract the pulsing interval and recorded as heartbeat interval. After checking the correctness of heartbeat interval, the heartbeat intervals were resampled into 5Hz time series data. The data were converted into frequency domain using Short Term Fourier Transformation (STFT) to identify frequency components of Heart Rate Variability (HRV). From the HRV frequency, we were able to examine the relationship between respiratory rate and ANS quantitatively. As the result, the high frequency components of HRV (the peak at High frequency band) were 98% agree with the designed respiratory rate. The different from predictions were only 2.17% for male subjects and 1.73% for female subjects. Furthermore, from the careful examination of STFT data, the subjects were having full concentration of following the pacing of breathing pattern closely. The result of this study is in agreement with the qualitative phenomenon of HRV and respiratory rate. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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