Heartbeat fluctuation and autonomic nervous function : Its clinic and prospect.Change in cardiac autonomic nervous activity by frequency analysis of ECG R-R interval.Indication for superior thoracic extradural anesthesia.

KAWAMOTO, M. (1995). Heartbeat fluctuation and autonomic nervous function : Its clinic and prospect.Change in cardiac autonomic nervous activity by frequency analysis of ECG R-R interval.Indication for superior thoracic extradural anesthesia. THE JOURNAL OF JAPAN SOCIETY FOR CLINICAL ANESTHESIA, 15(6), 468–470. https://doi.org/10.2199/jjsca.15.468