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Variant autonomic regulation during active standing in Swedish and Japanese junior high school children
Author(s) -
Kajiura Mitsugu,
Tanaka Hidetaka,
Borres Magnus,
Thulesius Olav,
Yamaguchi Hitoshi,
Tamai Hiroshi
Publication year - 2008
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1111/j.1475-097x.2008.00790.x
Subject(s) - medicine , supine position , blood pressure , heart rate , heart rate variability , cardiology , basal (medicine) , autonomic function , sympathetic activity , mean arterial pressure , insulin
Summary The present investigation is about cardiovascular responses and relevant autonomic function in Swedish and Japanese pubertal children on active standing using non‐invasive continuous beat‐to‐beat finger arterial pressure (FAP) monitoring and power spectral analysis. Examined were 54 Swedish and 57 Japanese children (13–15 years). FAP and heart rate (HR) was continuously recorded in the supine position and during standing. Supine FAP was significantly higher in Swedish compared with Japanese children (121/62 versus 103/53 mmHg, P < 0·001). Swedish children showed a higher increase in arterial pressure and HR upon uprising, resulting in a higher vasoconstrictor index (5·04 ± 0·22 versus 2·31 ± 0·11 mmHg s −1 , P < 0·001, respectively). There were also higher increases in arterial pressure and HR in the following steady state period (1–7 min) between the two groups. These differences were also found after adjustment of body weight and height. Frequency domain analysis of HR and arterial pressure variability indicated significantly higher low/high frequency power of HR and low frequency power of arterial pressure. These results suggest that Swedish pubertal children have higher basal blood pressure and enhanced cardiovascular sympathetic responses. These differences in the two cohorts might be caused by genetic factors.