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Biomedical subjects

K C Light

Publications and source records attributed to K C Light.

93 records · Page 6Linked to original sources

Women with eating disorder tendencies display altered cardiovascular, neuroendocrine, and psychosocial profiles.

OBJECTIVE: Cardiovascular, neuroendocrine, and psychosocial profiles were investigated in women with eating disorder tendencies, but who had never met clinical criteria for an eating disorder, and in healthy controls. METHODS: Twenty-six women who scored in the highest distribution of the Eating Disorder Inventory bulimia subscale (HEDI women) and 27 women who scored in the lowest distribution (LEDI women) completed psychosocial questionnaires, underwent a speech reactivity task for measures of blood pressure and heart rate reactivity, and also underwent 24-hour ambulatory blood pressure monitoring and urinary neuroendocrine collection. RESULTS: The HEDI women exhibited increased blood pressure and heart rate reactivity to the speech task and increased 24-hour urinary cortisol, but decreased 24-hour urinary norepinephrine compared with LEDI women. There were no overall group differences in 24-hour ambulatory blood pressure levels, but negative mood and tension were associated with greater systolic blood pressures for all women. Finally, HEDI women reported greater depressive symptoms and anxiety, lower self-esteem and sense of mastery, less social support, poor coping skills, and greater emotional impact of daily stressors relative to LEDI women. CONCLUSIONS: These results indicate that the same pattern of neuroendocrine and psychosocial profiles seen in prior studies of bulimia nervosa are also present in women with eating disorder tendencies.

Adolescent↗

Cardiovascular reactivity to behavioral stress in young males with and without marginally elevated casual systolic pressures. Comparison of clinic, home, and laboratory measures.

Heart rate (HR), systolic (SBP), and diastolic (DBP) blood pressure levels were compared in 60 young males during various resting and stressful conditions. Subjects included 29 who had and 31 who had not shown occasional casual SBP readings greater than or equal to 135 mm Hg under low stress conditions. These groups were further divided into those who showed above-average and below-average HR increases at onset of a stressful shock-avoidance task (high vs low HR reactors). High HR reactors, who were equally distributed in both casual SBP groups, also showed higher SBP than low reactors during avoidance, and higher HR and SBP during a pre-stress rest period and two other stresses, the cold pressor test and viewing an erotic film (p's less than 0.01). During less stressful conditions (relaxation in the laboratory, family doctor readings, and self-determinations at home), no HR, SBP, or DBP differences were seen between high and low HR reactors. Subjects with casual SBPs greater than or equal to 135 showed higher mean SBP than those with casual SBPs less than 135 under all resting and stressful conditions (p's less than 0.05) and generally higher DBP as well. Highest mean SBP levels during prestress rest and later stresses were shown by subjects with both casual SBPs greater than or equal to 135 and high HR reactivity to the avoidance task, and lowest by subjects with neither trait. Incidence of parental hypertension was greater among high than low HR reactors, and greatest among high reactors with casual SBPs greater than or equal to 135, suggesting that HR reactivity to stress may help predict future hypertension.

Adolescent↗