A study of cardiac autonomic control and pulmonary functions in different phases of menstrual cycle.
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Date
2012-07
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Abstract
Introduction: Menstrual cycle is a physiological cyclical occurrence in women. This is associated with variations
in metabolism and associated endocrine fluctuations. Among other things, the cardio respiratory changes too have
been observed. In the present study, we investigated the autonomic control of heart, and concurrent changes in the
respiratory system. Material and methods: Forty seven normally menstruating women were recruited from a group
of 80 subjects reported for this study voluntarily. ECG was recorded from limb lead II time domain and frequency
domain analysis of Heart rate Variability (HRV) was done. Their respiratory parameters namely PEFR, FEV1 were
determined. Results: The results of this study were analysed by applying Wilcoxon’s signed rank sum test. In Time
domain analysis RMSSD (36.91±2.73, p<0.05) showed significant decrease during ovulation, while other
parameters did not show significant variation among the three phases. Frequency domain analysis yielded results to
suggest that there is increased variability during Ovulatory and Luteal phase (p<0.05). PEFR and FEV1 increased in
luteal phase (p<0.05).Conclusions: The results of our study reiterated the findings of reports of previous studies on
the heart rate variability suggesting that the HRV was more during ovulatory and luteal phase. This is suggestive of
the role of Progesterone on the HRV. Similarly the respiratory parameters too showed an increased PEFR and FEV1
suggesting a decreased airway resistance, while other parameters remained unchanged.
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Keywords
Heart rate variability, pulmonary function, menstrual cycle
Citation
Vishrutha K V, Harini N, Ganaraja B, Pavanchand A, Veliath Susheela. A study of cardiac autonomic control and pulmonary functions in different phases of menstrual cycle. International Journal of Applied Biology and Pharmaceutical Technology. 2012 Jul-Sept; 3(3): 306-311.