Die invloed van konsentrasiespanning op die kardiovaskulêre sisteem van die mens
Abstract
Persons in senior professions with a lot of responsibilities
have a high incidence of cardiovascular diseases. Little is
known about the effect of mental stress on the cardiovascular
system.
With this research is found a reliable experimental method to
get a total view on the events in the cardiovascular system
during mental stress in the daily work routine.
The subjects in this investigation were anxious young men, calm
young men and calm thirty year old men. Changes in the heart
frequence, contractility of the heart and peripheral resistance
during mental stress were successfully measured with the
electrocardiogram, phonocardiogram, ballistocardiogram and
pletysmogram. Al parameters showed noticeable changes during
mental stress.
No clear differences were found in the results between the
different groups (most Iikely due to the small groups). The
cardiovascular reactions of the calm young men corresponded
in the different experiments, while great variations were
found in the other two groups.
The variations in the results of the individual subjects showed
that psychological processes effect the cardiovascular system .
The binaire choice generator was experimentally found the best
method to arise mental stress. With the digital calculator
developed, could reliable hemodynamic changes be measured. The
method used in this study can be used heIpfuIIy for future
clinical work.