[Effects of control on cardiovascular changes and coronary-prone behavior pattern (author's transl)].

The purpose of this study was to clarify the effects of control on systolic and diastolic blood pressures and heart rate. Variables included cold pressor and surgical film as uncontrollable stressors and reaction time to avoid aversive stimulation. Diastolic blood pressure was more elevated during cold pressor, while systolic elevations were not significantly differentiated between cold pressor and reaction time task. Heart rate was kept considerably lower during surgical film. The relationship between Type A and Type B behavior patterns and the stress condition was examined on cardiovascular measures. The results revealed no differences between Type A and Type B subjects.