https://scholars.lib.ntu.edu.tw/handle/123456789/376518
標題: | Effects of respiratory time ratio on heart rate variability and spontaneous baroreflex sensitivity. | 作者: | YONG-PING WANG Kuo, Terry B.J. Lai, Chun-Ting Chu, Jui-Wen Yang, Cheryl C.H. |
關鍵字: | Baroreflex; Heart rate variability; Respiration; Respiratory time ratio | 公開日期: | 十二月-2013 | 卷: | 115 | 期: | 11 | 起(迄)頁: | 1648 | 來源出版物: | Journal of Applied Physiology | 摘要: | Paced breathing is a frequently performed technique for cardiovascular autonomic studies. The relative timing of inspiration and expiration during paced breathing, however, is not consistent. We, therefore, examined whether indexes of heart rate variability and spontaneous baroreflex sensitivity would be affected by the respiratory time ratio that is set. We studied 14 healthy young adults who controlled their breathing rates to either 0.1 or 0.25 Hz in the supine and sitting positions. Four different inspiratory-to-expiratory time ratios (I/E) (uncontrolled, 1:1, 1:2, and 1:3) were examined for each condition in a randomized order. The results showed spectral indexes of heart rate variability and spontaneous baroreflex sensitivity were not influenced by the I/E that was set during paced breathing under supine and sitting positions. Porta's and Guzik's indexes of heart rate asymmetry were also not different at various I/E during 0.1-Hz breathing, but had larger values at 1:1 during 0.25-Hz breathing, although significant change was found in the sitting position only. At the same time, Porta's and Guzik's indexes obtained during 0.1-Hz breathing were greater than during 0.25-Hz breathing in both positions. The authors suggest that setting the I/E during paced breathing is not necessary when measuring spectral indexes of heart rate variability and spontaneous baroreflex sensitivity under the conditions used in this study. The necessity of paced breathing for the measurement of heart rate asymmetry, however, requires further investigation. Copyright ? 2013 the American Physiological Society. |
URI: | http://europepmc.org/abstract/med/24092689 http://scholars.lib.ntu.edu.tw/handle/123456789/376518 |
DOI: | 10.1152/japplphysiol.00163.2013 | SDG/關鍵字: | adult; article; breathing; breathing mechanics; breathing rate; controlled clinical trial; controlled study; female; heart rate; heart rate variability; human; male; physiology; pressoreceptor reflex; randomized controlled trial; respiratory time ratio; baroreflex; heart rate variability; respiration; respiratory time ratio; Adult; Baroreflex; Female; Heart Rate; Humans; Male; Respiration; Respiratory Mechanics; Respiratory Rate |
顯示於: | 醫學院附設醫院 (臺大醫院) |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。