Introduction of the discussion on "essential hypertension".
D000223:Adaptation, Psychological; D000342:Affective Symptoms; D001290:Attitude; D001794:Blood Pressure; D003220:Conflict, Psychological; D003674:Defense Mechanisms; D004644:Emotions; D006801:Humans; D006973:Hypertension; D007046:Hysteria / Q000209:etiology; D010551:Personality; D010553:Personality Development; D011602:Psychophysiologic Disorders / Q000209:etiology; D013315:Stress, Psychological