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Volume 8 Issue 6 (June, 2020)

Original Articles

Evaluation of heart rate variability in different phases of menstrual cycle
Dr. Sanjay Nagar, Dr. Anoop Kumar

Background: Heart rate variability analysis has been extensively used as a tool to examine the underlying mechanisms involved in autonomic control of the heart. The present study was conducted to determine heart rate variability in menstrual cycle. Materials & Methods: The present study was conducted on 110 females age ranged 20-40 years. Two main frequency components that is the low frequency (LF) components and the high frequency (HF) components were measured and LF/HF ratio was analyzed. To quantify heart rate, the analog ECG signal was obtained using lead II to obtain a QRS complex of sufficient amplitude and stable base line. Results: The mean LF level in menstrual phase was 42.3, in follicular phase was 47.5 and in luteal phase was 61.7. The difference was significant (P< 0.05). The mean HF level in menstrual phase was 50.2, in follicular phase was 61.3 and in luteal phase was 43.5. The difference was significant (P< 0.05). LF/HF level in menstrual phase was 0.72, in follicular phase was 1.03 and in luteal phase was 1.82. The difference was significant (P< 0.05). Conclusion: Authors found sympathetic nervous activity in the luteal phase is greater than in the follicular phase whereas parasympathetic nervous activity is predominant in the follicular phase. Key words: Follicular phase, Heart rate variability, Sympathetic nervous activity.

 
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