Lack of relationship between cardiovascular reactivity to mental stress and autonomic modulation of the sinoatrial node in normotensive and hypertensive male subjects

Guasti, Luigina; Simoni, Cinzia; Mainardi, Luca; Crespi, Chiara; Cimpanelli, Mariagrazia; Klersy, Catherine; Gaudio, Giovanni; Codari, R.; Maroni, Lorenzo; Marino, Franca; Cosentino, Marco; Grandi, Anna Maria; Cerutti, S.; Venco, Achille

doi:10.1016/j.ijpsycho.2008.10.006

Cited by 2 publications

(1 citation statement)

References 56 publications

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“…We assume that a change of the ANS dynamic balance could depend on the baroreceptor's activity. If the parasympathetic activity decreases and sympathetic activity rises in response to stress, the resulting low-frequency band activity will depend on proportional change in these subsystems (50,51).…”

Section: Nonlinear Analysismentioning

confidence: 99%

Heart Rate Variability and Electrodermal Activity as Noninvasive Indices of Sympathovagal Balance in Response to Stress

Višňovcová¹,

Čalkovská²,

Tonhajzerová³

2013

Acta Medica Martiniana

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The autonomic nervous system (ANS) is a principal regulatory system for maintaining homeostasis, adaptability and physiological flexibility of the organism at rest as well as in response to stress. In the aspect of autonomic regulatory inputs on the cardiovascular system, recent research is focused on the study of exaggerated/diminished cardiovascular reactivity in response to mental stress as a risk factor for health complications, e.g. hypertension. Thus, the analysis of biological signals reflecting a physiological shift in sympathovagal balance during stress in the manner of vagal withdrawal associated with sympathetic overactivity is important. The heart rate variability, i.e. “beat-to-beat” oscillations of heart rate around its mean value, reflects mainly complex neurocardiac parasympathetic control. The electrodermal activity could represent “antagonistic” sympathetic activity, the so-called “sympathetic arousal” in response to stress. The detailed study of the physiological parameters under various stressful stimuli and in recovery phase using traditional and novel mathematical analyses could reveal discrete alterations in sympathovagal balance. This article summarizes the importance of heart rate variability and electrodermal activity assessment as the potential noninvasive indices indicating autonomic nervous system activity in response to mental stress.

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Section: Nonlinear Analysismentioning

confidence: 99%

Heart Rate Variability and Electrodermal Activity as Noninvasive Indices of Sympathovagal Balance in Response to Stress

Višňovcová¹,

Čalkovská²,

Tonhajzerová³

2013

Acta Medica Martiniana

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Effects of mental stress on autonomic cardiac modulation during weightlessness

Aubert¹,

Verheyden²,

d’Ydewalle

et al. 2010

American Journal of Physiology-Heart and Circulatory Physiology

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Sustained weightlessness affects all body functions, among these also cardiac autonomic control mechanisms. How this may influence neural response to central stimulation by a mental arithmetic task remains an open question. The hypothesis was tested that microgravity alters cardiovascular neural response to standardized cognitive load stimuli. Beat-to-beat heart rate, brachial blood pressure, and respiratory frequency were collected in five astronauts, taking part in three different short-duration (10 to 11 days) space missions to the International Space Station. Data recording was performed in supine position 1 mo before launch; at days 5 or 8 in space; and on days 1, 4, and 25 after landing. Heart rate variability (HRV) parameters were obtained in the frequency domain. Measurements were performed in the control condition for 10 min and during a 5-min mental arithmetic stress task, consisting of deducting 17 from a four-digit number, read by a colleague, and orally announcing the result. Our results show that over all sessions (pre-, in-, and postflight), mental stress induced an average increase in mean heart rate (Delta7 +/- 1 beats/min; P = 0.03) and mean arterial pressure (Delta7 +/- 1 mmHg; P = 0.006). A sympathetic excitation during mental stress was shown from HRV parameters: increase of low frequency expressed in normalized units (Delta8.3 +/- 1.4; P = 0.004) and low frequency/high frequency (Delta1.6 +/- 0.3; P = 0.001) and decrease of high frequency expressed in normalized units (Delta8.9 +/- 1.4; P = 0.004). The total power was not influenced by mental stress. No effect of spaceflight was found on baseline heart rate, mean arterial pressure, and HRV parameters. No differences in response to mental stress were found between pre-, in-, and postflight. Our findings confirm that a mental arithmetic task in astronauts elicits sympathovagal shifts toward enhanced sympathetic modulation and reduced vagal modulation. However, these responses are not changed in space during microgravity or after spaceflight.

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Lack of relationship between cardiovascular reactivity to mental stress and autonomic modulation of the sinoatrial node in normotensive and hypertensive male subjects

Cited by 2 publications

References 56 publications

Heart Rate Variability and Electrodermal Activity as Noninvasive Indices of Sympathovagal Balance in Response to Stress

Heart Rate Variability and Electrodermal Activity as Noninvasive Indices of Sympathovagal Balance in Response to Stress

Effects of mental stress on autonomic cardiac modulation during weightlessness

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