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Haematological changes during acute mental stress.

C Jern¹, H Wadenvik, H Mark

¹Department of Clinical Physiology, University of Göteborg, Ostra Hospital, Sweden.

British Journal of Haematology

|January 1, 1989

Summary

Mental stress significantly elevates blood cell counts, including leucocytes and platelets, and also increases heart rate and blood pressure in healthy males. These hematological changes are linked to physiological stress responses.

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Area of Science:

Hematology
Psychophysiology
Stress Physiology

Background:

Emotional and mental stress can trigger physiological responses.
Understanding the hematological effects of stress is crucial for assessing overall health impacts.

Purpose of the Study:

To investigate the hematological effects of acute mental stress.
To correlate blood parameter changes with cardiovascular responses during stress.

Main Methods:

Blood samples were collected from 29 healthy males before, during, and after a 10-minute mental arithmetic task.
Measurements included peripheral blood cell counts, hemoglobin, hematocrit, heart rate, and blood pressure.

Main Results:

Mental stress led to significant increases in peripheral blood cell count, hemoglobin, and hematocrit.

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Leukocyte and platelet counts increased more significantly than hemoglobin concentration.

Blood pressure and heart rate also increased significantly, with correlations observed between blood pressure and leukocyte mobilization, and heart rate and erythrocyte/hemoglobin/hematocrit levels.

Conclusions:

Mental stress induces notable increases in leukocyte and platelet counts.
These hematological changes are not solely explained by hemoconcentration during stress.
The findings highlight the complex interplay between psychological stress and hematological parameters.