心電図R波を基準とした脈波伝搬時間の推定

概要

論文の詳細を見る
Pulse Transit Time (PTT) has been measured using phonocardiogram (PCG), carotid arterial pulse (CAP) and inguinar artery. For the time axis reference in the PTT estimation, the onset time of breast vibration (bv) was used which was obtained from the acceleration sensor placed on the chest wall. In this study, an experiment was carried out to establish a brief method of PTT estimation. In the analysis, ECG R-wave was used as a reference timing for measurement of PTT. As a result, asynchrony of bv and ECG R-wave was negligibly small, 0.013(s) in the transit time from bv to PTG (τvP). Therefore, it was possible to use the time from ECG R-wave to PTG (τEP). As a feasibility study, τvP and τEP were measured under cooling stimulation and the induced autonomic response was analyzed. Under cooling stimulation τEP was decreased from 0.1823±0.0069(s) to 0.1685±0.0136(s) (p<0.01). After that period τEP recovered up to the level of the control condition of 0.1817±0.0085(s)(p<0.05). This result showes consistent tendencies with previous findings. The Present method makes it easier to estimate PTT because of the high S/N ratio of ECG waveform. Some problems of practical application are also discussed.
東海大学の論文
1998-03-30