Circadian Pattern of Blood Pressure and Cardiovascular Autonomic Regulation During Different Phases of Pre- and Post-menopausal Women: A 24 hours & 7 days Study
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Abstract
Background: A significant difference in cardiovascular health exists between males and females, but marked differences can be observed in women of similar age groups also. Many studies were performed that suggested the role of several female sex hormones as a causal factor for increased cardiovascular risk but very less studies were present that directly focused on the role of circadian rhythmicity of blood pressure and cardiovascular autonomic regulation in postmenopausal women as well premenopausal women during different phases of menstrual cycle.
Objective: The present study is aimed to assess the twenty hours seven days circadian reproducibility of blood pressure and autonomic regulation of cardiovascular system providing alteration in the various menstrual phases in pre-menopausal and post-menopausal age groups.
Materials and methods: This was a comparative study of 50 pre- and 50 post-menopausal age group women done with the help of a structured questionnaire, ambulatory blood pressure monitoring (24-hour, 4-7 days), and autonomic nervous system monitoring and heart rate variability.
Results: The study shows significant changes in autonomic regulation of postmenopausal women compared to the premenopausal group, with significant differences between MESOR of Systolic BP, diastolic BP and HR. Increased circadian amplitude in postmenopausal women, suggestive of overall decreased chronobiological parameters of cardiovascular system in post-menopausal group.
Conclusion: Correlation of circadian patterns of Blood pressure and their correlation with autonomic regulation and heart rate variability could have clinical significance in the treatment and Pre-habilitation of cardiovascular diseases at earlier or primordial stages in postmenopausal as well as premenopausal women.
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