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Sympathetic and parasympathetic activities evaluated by heart-rate variability in head injury of various severities.
Clin Neurophysiol. 2005 Jun; 116(6):1273-9.CN

Abstract

OBJECTIVE

To investigate the autonomic function in patients with brain damage of various extents. The purposes were to correlate the parameters derived from spectral analysis of the heart-rate variability (HRV) with the classic Glasgow coma scale (GCS), and to evaluate the possible clinical application of HRV in the autonomic functions in patients with various severities of brain-stem injury.

METHODS

A total of 90 patients was divided into 5 groups based on the GCS: I: 15, II: 9-14, III: 4-8, no pupil dilatation, IV: 4-8, pupil dilatation, and V: 3, brain death. Electrocardiogram was recorded for frequency-domain analysis of RR intervals. HRV were categorized into the low-frequency (LF, 0.04-0.15Hz) and high-frequency power (HF, 0.15-0.40Hz), LF to HF power ratio (LF/HF), normalized powers (LF and HF%). These HRV parameters were correlated with the severity of brain damage.

RESULTS

The LF, HF, LF%, and LF/HF in Group I were essentially similar to those in the normal subjects. LF and HF decreased from Group I to IV. All parameters were nearly absent in Group V.

CONCLUSIONS

The increases in LF% and LF/HF with the decrease in HF indicate augmented sympathetic and attenuated parasympathetic drive. These changes were related to the severity of brain-stem damage. Both LF and HF were nearly abolished in brain death.

SIGNIFICANCE

Our analysis indicates that HRV may be an useful tool for evaluating the autonomic functions in patients with brain damage of various degrees.

Authors+Show Affiliations

The Division of Neurosurgery, Department of Surgery, Tzu Chi University, Hualien, Taiwan, ROC.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15978489

Citation

Su, Chain-Fa, et al. "Sympathetic and Parasympathetic Activities Evaluated By Heart-rate Variability in Head Injury of Various Severities." Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology, vol. 116, no. 6, 2005, pp. 1273-9.
Su CF, Kuo TB, Kuo JS, et al. Sympathetic and parasympathetic activities evaluated by heart-rate variability in head injury of various severities. Clin Neurophysiol. 2005;116(6):1273-9.
Su, C. F., Kuo, T. B., Kuo, J. S., Lai, H. Y., & Chen, H. I. (2005). Sympathetic and parasympathetic activities evaluated by heart-rate variability in head injury of various severities. Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology, 116(6), 1273-9.
Su CF, et al. Sympathetic and Parasympathetic Activities Evaluated By Heart-rate Variability in Head Injury of Various Severities. Clin Neurophysiol. 2005;116(6):1273-9. PubMed PMID: 15978489.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sympathetic and parasympathetic activities evaluated by heart-rate variability in head injury of various severities. AU - Su,Chain-Fa, AU - Kuo,Terry B, AU - Kuo,Jon-Son, AU - Lai,Hsien-Yong, AU - Chen,Hsing I, Y1 - 2005/03/25/ PY - 2004/05/30/received PY - 2004/12/30/revised PY - 2005/01/19/accepted PY - 2005/6/28/pubmed PY - 2005/8/10/medline PY - 2005/6/28/entrez SP - 1273 EP - 9 JF - Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology JO - Clin Neurophysiol VL - 116 IS - 6 N2 - OBJECTIVE: To investigate the autonomic function in patients with brain damage of various extents. The purposes were to correlate the parameters derived from spectral analysis of the heart-rate variability (HRV) with the classic Glasgow coma scale (GCS), and to evaluate the possible clinical application of HRV in the autonomic functions in patients with various severities of brain-stem injury. METHODS: A total of 90 patients was divided into 5 groups based on the GCS: I: 15, II: 9-14, III: 4-8, no pupil dilatation, IV: 4-8, pupil dilatation, and V: 3, brain death. Electrocardiogram was recorded for frequency-domain analysis of RR intervals. HRV were categorized into the low-frequency (LF, 0.04-0.15Hz) and high-frequency power (HF, 0.15-0.40Hz), LF to HF power ratio (LF/HF), normalized powers (LF and HF%). These HRV parameters were correlated with the severity of brain damage. RESULTS: The LF, HF, LF%, and LF/HF in Group I were essentially similar to those in the normal subjects. LF and HF decreased from Group I to IV. All parameters were nearly absent in Group V. CONCLUSIONS: The increases in LF% and LF/HF with the decrease in HF indicate augmented sympathetic and attenuated parasympathetic drive. These changes were related to the severity of brain-stem damage. Both LF and HF were nearly abolished in brain death. SIGNIFICANCE: Our analysis indicates that HRV may be an useful tool for evaluating the autonomic functions in patients with brain damage of various degrees. SN - 1388-2457 UR - https://www.unboundmedicine.com/medline/citation/15978489/Sympathetic_and_parasympathetic_activities_evaluated_by_heart_rate_variability_in_head_injury_of_various_severities_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1388-2457(05)00032-5 DB - PRIME DP - Unbound Medicine ER -