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Age dependency of autonomic response to recumbent positions
Author(s) -
Sato Ryuhei,
Sasaki Konosuke,
Haga Mayu,
Sato Haruka,
Kimura Yurie,
Kanno Emi,
Maruyama Ryoko
Publication year - 2013
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.27.1_supplement.1126.7
Subject(s) - supine position , medicine , autonomic nervous system , cardiology , sympathetic nervous system , parasympathetic nervous system , physical medicine and rehabilitation , heart rate , blood pressure
Little research has been conducted on age‐related differences in autonomic nervous activity and circulation between the various recumbent positions. The purpose of the present study was to evaluate whether young and elderly subjects show differences in the autonomic nervous activity and circulation between the 3 positions (supine, right lateral decubitus, and left lateral decubitus position). We performed electrocardiographic measurements for 58 young (19–34 years) and 50 elderly subjects (63–85 years). The subjects were asked to randomly maintain any of the lateral positions at an angle of over 45° for 10 min after remaining in the supine position. Compared to young subjects, the elderly subjects had significantly lower high frequency (HF) component. However, the 2 groups had no significant difference in the low frequency (LF) component/HF ratio in the supine position. Further, neither of the groups showed any significant change in the HF for any position. In contrast, the LF/HF ratio in the right lateral decubitus position was significantly lesser than that in the supine position only for the elderly group. These findings suggest that age is an important factor affecting the autonomic nervous activity, especially sympathetic nervous activity, in different recumbent positions.