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Delaying orthostatic syncope with mental challenge: A pilot study

Goswami, Nandu ; Roessler, Andreas ; Szalkay, Helmut Hinghofer ; Montani, Jean Pierre ; Steptoe, Andrew

In: Physiology & Behavior, 2012, vol. 106, no. 4, p. 569–573

At orthostatic vasovagal syncope there appears to be a sudden decline of sympathetic activity. As mental challenge activates the sympathetic system, we hypothesized that doing mental arithmetic in volunteers driven to the end point of their cardiovascular stability may delay the onset of orthostatic syncope. We investigated this in healthy male subjects. Each subject underwent a head up tilt...

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Time course of cardiovascular responses induced by mental and orthostatic challenges

Lackner, Helmut Karl ; Goswami, Nandu ; Papousek, Ilona ; Roessler, Andreas ; Grasser, Erik Konrad ; Montani, Jean-Pierre ; Jezova, Daniela ; Hinghofer-Szalkay, Helmut

In: International Journal of Psychophysiology, 2010, vol. 75, no. 1, p. 48-53

Cardiovascular responses to single stressors diminish over time. Interaction of different stressors influencing hemodynamic variables, indicative of stress-induced reactivity and physiological responses are, however, poorly understood. We investigated time course of mental (using mental arithmetic, MA) and orthostatic (using head up tilt, HUT) challenges induced responses in 16 males. Three...

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Rate of cardiovascular recovery to combined or separate orthostatic and mental challenges

Goswami, Nandu ; Lackner, Helmut Karl ; Papousek, Ilona ; Jezova, Daniela ; Hinghofer-Szalkay, Helmut ; Montani, Jean-Pierre

In: International Journal of Psychophysiology, 2010, vol. 75, no. 1, p. 54-62

Post stress neurovascular responses induced by physical and mental stress are poorly understood. We investigated the time course of cardiovascular and autonomic recovery, induced by orthostatic and mental challenge, using passive head up tilt (HUT) and mental arithmetic (MA), respectively, when applied singly (MA, HUT) or in combination (MA + HUT). Fifteen healthy males participated in three...

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