| Autor: |
Kochiadakis, George E., Parthenakis, Fragiskos I., Zuridakis, Emmanuel G., Rombola, Amalia T., Chrysostomakis, Stavros I., Vardas, Panos E. |
| Předmět: |
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| Zdroj: |
Pacing & Clinical Electrophysiology; Nov1996, Vol. 19 Issue 11, p1872-1876, 5p |
| Abstrakt: |
The aim of this study was to investigate autonomic nervous system tone in patients with mitral valve prolapse (MVP). Heart rate variability (HRV) was assessed from 24-hour ambulatory Holter recordings in 28 patients with primary MVP and in 28 age and sex matched normal control subjects in a drug-free state. Sixteen of the MVP patients were symptomatic and 12 asymptomatic. Spectral HRV was calculated in terms of low (LF: 0.06–0.15 Hz) and high (HF: 0.15–0.40 Hz) frequency components using fast Fourier transform analysis, and the ratio LF/HF was calculated. Spectral analysis of HRV showed that the MVP patients, taken as a single group, had lower HF and LF and a higher LF/HF ratio than the controls. No significant difference in HRV was found between the 16 symptomatic and the 12 asymptomatic patients, but the symptomatic patients had a significantly higher LF/HF ratio than the controls. Our observations suggest that, during normal daily activities, patients with MVP experience a significant deviation in autonomic nervous system tone with predominance of the sympathetic branch. This predominance is more marked in symptomatic patients. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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