Year :
2015
| Month :
October
| Volume :
9
| Issue :
10
| Page :
CC01 - CC04
Full Version
Effect of Different Phases of Menstrual Cycle on Heart Rate Variability (HRV)
Published: October 1, 2015 | DOI: https://doi.org/10.7860/JCDR/2015/.6592
Tejinder Kaur Brar, K. D. Singh, Avnish Kumar
1. Resident, Department of Physiology, Government Medical College, Patiala, Punjab, India.
2. Professor and Head of Department, Department of Physiology, Government Medical College, Patiala, Punjab, India.
3. Professor, Department of Physiology, Government Medical College, Patiala, Punjab, India.
Correspondence Address :
Ms. Tejinder Kaur Brar,
Resident, Department of Physiology, Government Medical College, Patiala, Punjab, India.
E-mail : brartejinder92@gmail.com
Abstract
Background: Heart Rate Variability (HRV), which is a measure of the cardiac autonomic tone, displays physiological changes throughout the menstrual cycle. The functions of the ANS in various phases of the menstrual cycle were examined in some studies.
Aims and Objectives: The aim of our study was to observe the effect of menstrual cycle on cardiac autonomic function parameters in healthy females.
Materials and Methods: A cross-sectional (observational) study was conducted on 50 healthy females, in the age group of 18-25 years. Heart Rate Variability (HRV) was recorded by Physio Pac (PC-2004). The data consisted of Time Domain Analysis and Frequency Domain Analysis in menstrual, proliferative and secretory phase of menstrual cycle. Data collected was analysed statistically using student’s pair t-test.
Results: The difference in mean heart rate, LF power%, LFnu and HFnu in menstrual and proliferative phase was found to be statistically significant. The difference in mean RR, Mean HR, RMSSD (the square root of the mean of the squares of the successive differences between adjacent NNs.), NN50 (the number of pairs of successive NNs that differ by more than 50 ms), pNN50 (the proportion of NN50 divided by total number of NNs.), VLF (very low frequency) power, LF (low frequency) power, LF power%, HF power %, LF/HF ratio, LFnu and HFnu was found to be statistically significant in proliferative and secretory phase. The difference in Mean RR, Mean HR, LFnu and HFnu was found to be statistically significant in secretory and menstrual phases.
Conclusion: From the study it can be concluded that sympathetic nervous activity in secretory phase is greater than in the proliferative phase, whereas parasympathetic nervous activity is predominant in proliferative phase.
Keywords
Autonomic nervous system, Heart rate, Low frequency, Menstrual cycle, Vagal activity
DOI: 10.7860/JCDR/2015/13795.6592
Date of Submission: Mar 04, 2015
Date of Peer Review: Apr 29, 2015
Date of Acceptance: Aug 05, 2015
Date of Publishing: Oct 01, 2015
Financial OR OTHER COMPETING INTERESTS: None.
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