[Psychological and behavior characteristics predicting blood pressure reactivity to mental stress].

This study was conducted with 58 subjects (31 males and 27 females): a sample of 37 normotensives (NT) (mean age 36 +/- 11) and a sample of 21 hypertensives (HT) without any antihypertensive medication (mean age 46 +/- 9). Cardiovascular reactivity was measured during a sequence of 3 computer assisted mental stress tasks (visual-motor tasks, maze test). Before and following the stress tasks the subjects were asked to respond on the same computer to psychological test and questionnaires measuring anxiety, depression (H.A.D. inventory) type A behavior (impatience, competition and drive for success; Bortner's scale), locus of control (attribution of success or failure to internal or external factors; Levenson's scale), and coping mechanisms used in response to everyday life stresses (Rosenzweig Picture Frustration Test, adapted by S. Consoli and E. Albert). Measurements of systolic (SBP) and diastolic blood pressure and heart rate were obtained automatically every minute during the entire computer session with a Colin Press-Mate BP 8800 sphygmomanometer. Pressure reactivity (PR) was defined as the relative difference between BP measured during mental stress and BP measured during non-stress condition (the reference period). Our hypotheses were that PR would be greater in HT than in NT, and that PR would be correlated with various psychological and behavioral characteristics. During the stress session, SBP in NT increased from 119.8 to 123.7 mmHg (p < 0.001) and in HT from 147.4 to 152 mmHg (p < 0.05): there was no significant difference between the two samples but in HT, SBP elevation persisted after the stress session, contrary to the NT, whose SBP quickly decreased to the reference values.(ABSTRACT TRUNCATED AT 250 WORDS)