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The Scientific World Journal
Volume 2013, Article ID 947385, 4 pages
http://dx.doi.org/10.1155/2013/947385
Clinical Study

Heart Rate Variability Analysis in Patients with Allergic Rhinitis

1Department of Otolaryngology, Taipei Veterans General Hospital, No. 201, Section 2, Shipai Road, Beitou District, Taipei 11217, Taiwan
2Institute of Clinical Medicine, National Yang-Ming University, Taipei 112, Taiwan
3School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
4Department of Otolaryngology, Taipei City Hospital, Taipei 103, Taiwan

Received 18 December 2012; Accepted 28 January 2013

Academic Editors: M. Armengot and M. Schloss

Copyright © 2013 Ming-Ying Lan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Very few studies investigate the role of the autonomic nervous system in allergic rhinitis. In this study, we evaluated the autonomic nervous system in allergic rhinitis patients using heart rate variability (HRV) analysis. Methods. Eleven patients with allergic rhinitis and 13 healthy controls, aged between 19 and 40 years old, were enrolled in the study. Diagnosis of allergic rhinitis was based on clinical history, symptoms, and positive Phadiatop test. Electrocardiographic recordings on the sitting and supine positions were obtained for HRV analysis. Results. In the supine position, there were no significant statistical differences in very-low-frequency power (VLF, ≤0.04 Hz), low-frequency power (LF, 0.04–0.15 Hz), high-frequency power (HF, 0.15–0.40 Hz), and the ratio of LF to HF (LF/HF) between the patient and control groups. The mean RR intervals significantly increased, while LF% and LF/HF significantly decreased in the patient group in the sitting position. Moreover, mean RR intervals, LF, and LF/HF, which were significantly different between the two positions in the control group, did not show a significant change with the posture change in the patient group. Conclusion. These suggest that patients with allergic rhinitis may have poor sympathetic modulation in the sitting position. Autonomic dysfunction may therefore play a role in the pathophysiology of allergic rhinitis.