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Respiratory sinus arrhythmia among menopausal women after exposition to extremely-low-frequency magnetic fields

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Pecyna M. B.
Journal of Physiology and Pharmacology. Supplement
|
2005
|
tom 56
|
nr 4
179-184
In this paper I endeavored to show that respiratory sinus arrhythmia closely corresponds with the perception of psychosomatic complaints. To achieve this aim, two groups of menopausal women, each consisting of 85 subjects, were compared, one of which exhibiting troubles with falling asleep, frequent awakening at night, and sweating and fatigability sensations during the day and the other being asymptomatic. Comparative non-invasive biometric analysis included the following: total, inspiratory, and expiratory heart rate, breathing rate, and respiratory sinus arrhythmia. Overall, I found that the respiratory sinus arrhythmia and heart and breathing rates were substantially greater in women with psychosomatic complaints. In this group, the cardiorespiratory indices were further enhanced following exposure to extremely-low-frequency magnetic fields. The study suggests the predominance of sympathetic aspects of the autonomic nervous system as a result of psychosomatic complaints in menopausal women and calls for a caution in using the extremely-low-frequency magnetic stimulation in such women, which may exacerbate untoward heart and respiratory responses.
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The level of intelligence and heart rate variability in men after myocardial infarction

100%
Pecyna M. B.
Journal of Physiology and Pharmacology. Supplement
|
2006
|
tom 57
|
nr 4
283-287
Heart rate variability (HRV) reflects periodic changes taking place in heart rhythm, which are controlled by the autonomic nervous system (ANS) and external factors. The aim of the present study was to assess the relationship between HRV and the level of intelligence using the Raven Advanced Matrices Test in 95 men (mean age 41.6 ±3.7SD yr) who experienced myocardial infarction during two years preceding the psychophysiological examination. HRV was analyzed from the EEG signal recordings in the time and spectral domains. It was found that post-myocardial infarct men of the higher than average intelligence had significantly increased HRV; the finding was reflected in the analysis of both time and frequency domains. Although both sympathetic and parasympathetic components showed an increase in the frequency domain, the former did disproportionately more, achieving substantial predominance. The results indicate that active mental processes and attitude, linked to a higher intelligence level, might be a beneficial prognostic marker, as is higher HRV, for the overall post-infarction cardiac mortality and for return of such subjects back to normal life. The corollary is that the assessment of IQ in post-infarction patients seems a simple screening method that may help presage the health and social course the patient takes.
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