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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(2):260-266.
The Effects of Long Bed Immobilization on the Heart Rate Variability.
Kim, Sang Kyu , Choi, Yang Muk , Lee, Kyoung Moo , Shin, Chul Jin , Kim, Yong Min
1Department of Rehabilitation Medicine, Chungbuk National University College of Medicine.
2Department of Neuropsychiatry, Chungbuk National University College of Medicine.
3Department of Orthopaedic Surgery, Chungbuk National University College of Medicine.
장기 침상안정이 심박 변화율에 미치는 효과
김상규, 최양묵, 이경무, 신철진2, 김용민1
충북대학교 의과대학 재활의학교실, 2신경정신과학교실 및 1정형외과학교실

The aims of this study were to know the effects of long time bed immobilization on the heart rate variability and to know the correlation between the heart rate variability and other anthropometric parameters.

The subjects of this study were 60 normal sedentary persons as control group and 22 patients who had been immobilized for a long time because of musculoskeletal problems without any systemic diseases. The heart rate variabilities were measured through the R-R interval variation at rest, deep breathing and valsalva maneuver. These values were compared between control and patient group and were analysed for correlation with age, weight, height, body mass index (BMI), amounts of smoking (pack years), spans of immobilization and physical activity scale (PAS).

The mean heart rate variability of patients were 0.132⁑0.072, 0.216⁑0.109, and 0.289⁑0.171 in rest, deep breathing and valsalva maneuver respectively which were lower than the corresponding 0.176⁑0.085, 0.314⁑0.146, and 0.322⁑0.174 of normal control group. The heart rate variabilities were negatively correlated with age, BMI and amounts of smoking but positively correlated with the height. The physical activity scale of preimmobilization state was negatively correlated with resting heart rate variability but was positively correlated with heart rate variability during deep breathing and valsalva maneuvering state.

The long bed immobilization significantly decreased the heart rate variability and the heart rate variability could be used as a useful tool to measure the effects of immobilization on the heart.

Key Words: Heart rate variability, Immobilization, Physical activity scale, Aging process


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