A Comparative Study of Heart Rate Variability During Deep Breathing in Normotensive and Hypertensive Subjects
Journal Title: International Journal of Medical and Health Sciences - Year 2015, Vol 4, Issue 4
Abstract
Background: Autonomic neuropathy in hypertensives leads to impaired regulation of blood pressure (BP) and heart rate variability (HRV).Heart Rate Variability with Deep Breathing (HRVdb) test is a simple, non- invasive & sensitive measure of cardiac autonomic function. Objective: To compare the heart rate variability in normotensive and hypertensive subjects and to evaluate heart rate variability during deep breathing (HRVdb) as tool to assess cardiovascular autonomic regulation, for clinical and research purposes. Material and Methods: The study included 50 normotensive and 50 hypertensive male subjects matched for age and BMI. HRV parameters: Mean RRI; RMSSD; LF; LFnu; HF; HFnu and LF/ HF ratio were analysed. One minute deep breathing test was employed and the mean of the heart rate differences in 6 breath cycles was analyzed. Results: The time & frequency domain measures of HRV were reduced in hypertensive group. HRVdb showed significant difference in the hypertensive group than in the normotensive group. Conclusion: Reduced HRVdb in the hypertensive group , indicates impaired regulation of the cardiovascular autonomic function. A reduction in HRV is associated with an increased risk of cardiac morbidity and mortality. HRVdb can be used as a simple bedside procedure to assess cardiovascular autonomic regulation and also as a simple non-invasive tool for clinical and research studies for the assessment of the neural control of heart rate.
Authors and Affiliations
Satish. S. Patil, R. H . Taklikar
Keywords
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