Short-term heart rate variability during a cognitive challenge in young and older adults

Wood, Robert H.; Maraj, Brian K. V.; Lee, C. Matthew; Reyes, Rafael

doi:10.1093/ageing/31.2.131

Cited by 44 publications

(46 citation statements)

References 18 publications

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“…15,44 There is conclusive research evidence for an inverse relationship between sympathetic (and to a lesser extent in parasympathetic) activity and age. 45,46 In addition, the ability of the organism to counteract sympathetic arousal by parasympathetic activation shows an inverse correlation to age. 47 In older adults HRV spectral power remains unchanged during hypoxia, providing further evidence of an age-related blunting of cardiac autonomic function.…”

Section: Study Limitationsmentioning

confidence: 99%

Autonomic and Cardiovascular Effects of Acute High Altitude Exposure After Myocardial Infarction and in Normal Volunteers

Messerli‐Bürgy

Meyer

Steptoe³

et al. 2009

Circ J

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Background: High sympathetic tone creates a significant risk for ventricular arrhythmias and sudden death, which can especially affect patients after a myocardial infarction (MI) when exercising in a hypoxic environment. Methods and Results: The 16 patients after MI and 10 normal volunteers (NV) underwent a 1-day trip from low altitude (540 m, Bern) to high altitude (3,564 m Jungfraujoch, Swiss Alps). Autonomic function under resting and mental stress conditions at low and high altitude was assessed. MI patients demonstrated a significantly lower stroke volume (P<0.05) at rest compared with the NV at low as well as high altitude. High altitude exposure was accompanied by higher low-frequency/high-frequency values in the MI patients compared with NV (P<0.01). Following mental stress, MI patients failed to show the normal return to resting values at high altitude, suggesting sustained sympathetic and diminished parasympathetic activation during post-stress recovery. Conclusions: Although all MI patients were either on β-blockers or AII inhibitors, they showed higher sympathetic activity during exposure to high altitude compared with NV. In addition, the respective parasympathetic tone was reduced, especially during recovery. This puts patients after MI at an increased risk for cardiac arrhythmias and they should be advised of this if going to high altitudes. (Circ J 2009; 73: 1485 -1491

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Section: Study Limitationsmentioning

confidence: 99%

Autonomic and Cardiovascular Effects of Acute High Altitude Exposure After Myocardial Infarction and in Normal Volunteers

Messerli‐Bürgy

Meyer

Steptoe³

et al. 2009

Circ J

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“…HR measures autonomic cardiovascular activity, especially the physiological aspect of emotions and HRV expresses the balance of the regulation of the sympathetic and parasympathetic nervous systems [11]. Cardiac autonomic modulation during provocative stress shows similar physiolog ical responses in young and old adults [12].…”

Section: Introductionmentioning

confidence: 99%

Perceived Mental Stress and Reactions in Heart Rate Variability—A Pilot Study Among Employees of an Electronics Company

Orsila

Virtanen²,

Luukkaala

et al. 2008

International Journal of Occupational Safety and Ergonomics

108

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In this study perceived mental stress during occupational work was compared to heart rate variability (HRV) using a traditional questionnaire and a novel wristop heart rate monitor with related software. (r = -.73 and r = -.60, respectively). The analysis shows that as the RMSSD and TINN value differences increase from night to morning, the stress decreases. The aim was to find HRV parameters useful for mental stress detection. We found the highest correlation between perceived mental stress with the differences between the values of triangular interpolation of rythm-to-rythm (RR) interval histogram (TINN) and the root mean square of differences of successive RR intervals (RMSSD) obtained in the morning and during the workdaywork stress wristop computer heart rate variability o o 276

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“…Mean values of states number (n), entropy (S), asymmetry (A), RR mean, standard deviation of the RR (SDRR) and the low frequency-high frequency ratio form the power spectra (LF/HF) obtained from healthy subjects. diminution in other linear index [12,23]. As a consequence of this transition reduction in the 41 -50 age group, some transitions disappear with a little increase in the transition with relatively high probability between unstable states as we referred before; these effects reduce the asymmetry values (table 1).…”

Section: Stability Of Statesmentioning

confidence: 69%

Heart Rate Variability Complexity in the Aging Process

Tejera

Plain

Portelinha³

et al. 2007

Computational and Mathematical Methods in Medicine

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In the present work, we propose a discrete model to the characterization of heart rate variability (HRV) complexity in the aging process of healthy subjects. We apply the Shannon entropy on the basis of an alternative way to probability calculation and to define a new index taking into consideration the transition probability that is related to the physiological complexity of the system. Our results suggest that in the aging process the capability response decreases according to the reduction of the physiological complexity. In the oldest group, an alternative mechanism emerges to compensate for this lack of capability; however, this effect does not increase the physiological complexity. Concomitantly, we provide some physiological explanation for our results.

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Short-term heart rate variability during a cognitive challenge in young and older adults

Abstract: cardiac autonomic modulation during provocative stress show similar physiologic responses in young and older adults.

Cited by 44 publications

References 18 publications

Autonomic and Cardiovascular Effects of Acute High Altitude Exposure After Myocardial Infarction and in Normal Volunteers

Autonomic and Cardiovascular Effects of Acute High Altitude Exposure After Myocardial Infarction and in Normal Volunteers

Perceived Mental Stress and Reactions in Heart Rate Variability—A Pilot Study Among Employees of an Electronics Company

Heart Rate Variability Complexity in the Aging Process

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