Postural effects on hemodynamic response to interpersonal interaction

Author(s): Neumann, S. A., Merrill, J. A.

Journal/Book: Biol Psychol. 1998; 48: PO Box 211, 1000 AE Amsterdam, Netherlands. Elsevier Science BV. 57-67.

Abstract: Laboratory studies of stress-induced cardiovascular reactivity have been conducted predominantly with participants in a seated posture. This procedure may contribute to limited laboratory-field generalization of cardiovascular response. The present study examined hemodynamic adjustments underlying presser responses, in addition to heart rate and systolic time intervals, during seated and standing role-played, interpersonal interaction in 60 young adults. Irrespective of gender or race, blood pressure responses to the seated and standing interactions were comparable. However, seated interactions yielded a significantly greater increase in heart rate, shortened preejection period and decreased stroke index as compared to standing. Alternatively, interacting while standing yielded a significantly increased left ventricular ejection time and total peripheral resistance in comparison to sitting. These results suggest that hemodynamic adjustments during stressful interpersonal interaction vary as a function of posture, with somewhat greater cardiac influences apparent while seated and a more pronounced vascular response while standing.

Note: Article Waldstein SR, Univ Maryland Baltimore Cty, Dept Psychol, 1000 Hilltop Circle, Baltimore,MD 21250 USA

Keyword(s): cardiovascular reactivity; hemodynamics; posture; impedance cardiography; psychological stress; blood pressure; DYNAMIC CARDIOVASCULAR REGULATION; BLOOD-PRESSURE; GENDER DIFFERENCES; WHITE ADOLESCENTS; HEART-RATE; REACTIVITY; HYPERTENSION; DISEASE; STRESS; STABILITY

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