Volume 21, Issue 4 (December 2017)                   Physiol Pharmacol 2017, 21(4): 260-265 | Back to browse issues page

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Ghafari T, Ghafari A, Mani A R, Raoufy M R. The controllability of cardiac rhythm in elderly. Physiol Pharmacol 2017; 21 (4) :260-265
URL: http://ppj.phypha.ir/article-1-1319-en.html
The controllability of cardiac rhythm in elderly
Tara Ghafari , Ava Ghafari , Ali R. Mani , Mohammad Reza Raoufy
Abstract:   (2767 Views)
Introduction: Recent reports have shown that rare fluctuations in cardiac cycles are ‘forgotten’ quickly in healthy individuals and it is possible to quantify the “memory length” of a physiological time-series using an inverse statistical approach. Methods: In the present study, we assessed the effect of aging on memory length in cardiac rhythm. Results: There was a longer memory length in cardiac time-series of elderly subjects in comparison with younger adults for both decelerating and accelerating rare fluctuations in cardiac rhythm. Conclusion: The increased memory length of the cardiac time-series in elderly subjects may indicate reduced controllability of cardiovascular regulatory system.
Keywords: Heart rate variability, Memory length, Controllability, Elderly
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Type of Manuscript: Short communication | Subject: Cardiovascular Physiology/Pharmacology
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