Assessment of Autonomic Function in Stroke Patients by Power Spectral Analysis of Heart Rate Variability.
- Author:
Joong Son CHON
1
;
Sae Il CHUN
;
Seung Hyun PARK
;
Juhn AHN
;
Soh Young BAEK
;
Youn Joo KANG
;
Won Su DOH
;
Kee Sam JEONG
;
Kun Soo SHIN
;
Myoung Ho LEE
Author Information
1. Department of Rehabilitation Medicine, Yonsei University College of Medicine.
- Publication Type:Original Article
- Keywords:
Stroke;
Power spectral analysis;
Heart rate variability;
Cardiac autonomic activity
- MeSH:
Arrhythmias, Cardiac;
Autonomic Nervous System;
Brain;
Death, Sudden;
Electrocardiography;
Heart Rate*;
Heart*;
Hemiplegia;
Humans;
Magnetic Resonance Imaging;
Respiration;
Stroke*
- From:Journal of the Korean Academy of Rehabilitation Medicine
1998;22(4):778-783
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: To evaluate the effects of orthostatic stress with a head-up tilt on the autonomic nervous system and to determine how a cerebral stroke influences the cardiac autonomic function, using the power spectral analysis(PSA) of heart rate variability(HRV). METHOD: We studied 11 stroke patients with a left hemiplegia and 14 patients with a right hemiplegia. Their hemispheric brain lesions were confirmed by the MRI. The ECG and respiration signals were recorded at the tilt angle of 0o and 70o for 5 minutes under the condition of frequency controlled respirtaion(0.25 Hz). Data were compared with the age- and sex-matched 12 healthy controls. RESULT: In a control group, the normalized high frequency power showed a significant decrease during the head-up tilt(p<0.05), whereas the normalized low frequency power showed a significant increase(p<0.05). But for the left and right hemiplegia groups, there were no significant changes of normalized high and low frequency power under the orthostatic stress(p>0.05). Compared with the right hemiplegia and control groups, the left hemiplegia group was associated more with a reduced low and high frequency power and showed no significant changes under the orthostatic stress. CONCLUSION: PSA of HRV can identify the reduced cardiac autonomic activity in stroke patients, with a greater reduction in the left hemiplegia group than in the right hemiplegia group, which may cause a high risk of cardiac arrhythmias and sudden death.
