Analyzing autonomic activity in electrocardiography about general anesthesia by spectrogram with multitaper time-frequency reassignment
Autonomic nerve activities in human body under general anesthesia are dynamic and diverse. Respiratory sinus arrhythmia is associated with depth of anesthesia, which exists in the high-frequency region of RRI (beat-to-beat R-peak interval) spectrum. Analyzing RRI variation in electrocardiography by classical power spectrum is insufficient because of the lack of temporal resolution. To better understand autonomic activity during anesthesia, we used spectrogram of RRI to extract its instantaneous information. For improving visual resolution, we choose a newly developed technique, multitaper time-frequency reassignment (MTFR), to estimate spectrograms. The technique provides time-varying spectrogram for RRI with good performance in time-frequency resolution and low fluctuation. Real-life cases are used to demonstrate the variety of autonomic activity presented clearly by the MTFR spectrogram, compared with Gabor spectrogram. Their implications in depth of anesthesia are discussed.
autonomic nerve activity depth of anesthesia multitaper time frequency reassignment electrocardiography respiratory sinus arrhythmia
Yu-Ting Linf Shu-Shya Hseu Huey-Wen Yien Jenho Tsao
Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital and Graduate Institute of Biomedi Department of Anesthesiology,Taipei Veterans General Hospital and National Yang-Ming University, Tai Department of Anesthesiology, Taipei Veterans General Hospital and YongLin Healthcare Foundation, Ta Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University,Taipei,
国际会议
上海
英文
628-632
2011-10-15（万方平台首次上网日期，不代表论文的发表时间）