Assessment of Autonomic Function in Stroke Patients by Power Spectral Analysis of Heart Rate Variability
Journal of the Korean Academy of Rehabilitation Medicine
;
: 778-783, 1998.
Article
in Korean
| WPRIM
| ID: wpr-724140
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(p0.05). 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arrhythmias, Cardiac
/
Respiration
/
Autonomic Nervous System
/
Brain
/
Magnetic Resonance Imaging
/
Stroke
/
Death, Sudden
/
Electrocardiography
/
Heart
/
Heart Rate
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Academy of Rehabilitation Medicine
Year:
1998
Type:
Article
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