Mental stress-induced hemoconcentration and its recovery: A controlled study of time course and mechanisms
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Mental stress-induced hemoconcentration and its recovery: A controlled study of time course and mechanisms. / DeBoer, D; Ring, Christopher; Curlett, AC; Ridley, M; Carroll, Douglas.
In: Psychophysiology, Vol. 44, 01.01.2007, p. 161-169.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Mental stress-induced hemoconcentration and its recovery: A controlled study of time course and mechanisms
AU - DeBoer, D
AU - Ring, Christopher
AU - Curlett, AC
AU - Ridley, M
AU - Carroll, Douglas
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Hemoconcentration to mental stress has been implicated in acute cardiovascular events. Participants were exposed to a 30-min baseline, a 4-min stress task, and a 40-min recovery; they also undertook a 74-min no-stress control session. Hemodynamic activity was recorded and blood sampled regularly and analyzed for hematocrit, colloid osmotic pressure, and coagulation time. Hematocrit increased with stress and fully recovered after 20 min. Colloid osmotic pressure showed a similar time course. No such changes occurred in the control session. Coagulation time was not perturbed by stress. The pattern of increase in hematocrit correlated with contemporary colloid osmotic pressure and blood pressure. In recovery, only colloid osmotic pressure was strongly associated with hematocrit. The mechanisms of stress-induced hemoconcentration may differ from those responsible for recovery, which may depend primarily on colloid osmotic pressure.
AB - Hemoconcentration to mental stress has been implicated in acute cardiovascular events. Participants were exposed to a 30-min baseline, a 4-min stress task, and a 40-min recovery; they also undertook a 74-min no-stress control session. Hemodynamic activity was recorded and blood sampled regularly and analyzed for hematocrit, colloid osmotic pressure, and coagulation time. Hematocrit increased with stress and fully recovered after 20 min. Colloid osmotic pressure showed a similar time course. No such changes occurred in the control session. Coagulation time was not perturbed by stress. The pattern of increase in hematocrit correlated with contemporary colloid osmotic pressure and blood pressure. In recovery, only colloid osmotic pressure was strongly associated with hematocrit. The mechanisms of stress-induced hemoconcentration may differ from those responsible for recovery, which may depend primarily on colloid osmotic pressure.
KW - time course
KW - mental stress
KW - coagulation time
KW - colloid osmotic pressure
KW - hemodynamic activity
KW - hemoconcentration
U2 - 10.1111/j.1469-8986.2006.00485.x
DO - 10.1111/j.1469-8986.2006.00485.x
M3 - Article
C2 - 17241152
VL - 44
SP - 161
EP - 169
JO - Psychophysiology
JF - Psychophysiology
SN - 0048-5772
ER -