Breathing rates and heart rate spectrograms regarding body position in normal subjects.
The right lateral body position has been proposed as an effective vagal enhancer. However, the possibility of breathing affecting heart rate power spectra in different body positions has not been assessed. The level of vagal modulation in various body positions in normal subjects was estimated by calculating heart rate power spectra. The results suggest that the levels of vagal modulation do not necessarily reflect a change due to assuming different body position, but might be the consequence of changed breathing patterns. Before adopting the right lateral body position as vagal enhancing, the contribution of varying breathing pattern should be eliminated.
Department of Communications and Computer Networks, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia. viktor.avbelj@ijs.si
Viktor
V
Avbelj
Jurij-Matija
JM
Kalisnik
Roman
R
Trobec
Borut
B
Gersak
D000328:Adult; D003627:Data Interpretation, Statistical; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D011187:Posture / Q000502:physiology*; D012016:Reference Values; D015656:Respiratory Mechanics / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted; D013564:Sympathetic Nervous System / Q000502:physiology; D014630:Vagus Nerve / Q000502:physiology