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KMID : 0372919970180030285
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Journal of Biomedical Engineering Research
1997 Volume.18 No. 3 p.285 ~ p.290
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A Study on the Characteristics of Heart Rate Variabilities In Nornal Subjects and Hemiplegic patients
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Jeong Kee-Sam
Shin Kun-Soo
Lee Jeong-Whan
Ahn Juhn
Chon Joong-Son
Kim Jun-Soo
Lee Myoung-Ho
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Abstract
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In this paper, the power spectral analysis and the fractal analysis of heart rate variability(HRV) were performed to evaluate the effects of brain lesion on cardiovascular system and autonomic function for 24 normal subjects and 22 hemiplegic patients. The ECG and respiration signals were recorded at tilt angles of and for 5 and 6 minutes successively under the condition of frequency controlled respiration (0.25Hz). For normal subjects, HR, LF component, HF component and fractral dimension of HRV were distinctly changed after orthostatic stress, whereas, for hemiplegic patients, those were little changed. Complexity and variability of heart rate of patients were smaller than those of normal subjects. Sympathetic tone of patients was higher than that in normal subjects. All of these results support that autonomic disorder and cardiovascular disturbance accompanied by brain lesion could be assessed by the power spectral analysis and fractal analysis of HRV.
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KEYWORD
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Heart Rate Variability (HRV), Autonomic Nervous System (ANS) Orthostatic Stress, Head-up Tilt Test, Stroke, Hemiplegia
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