Respiratory and baroreceptor reflex interactions in man.

Respiratory and arterial baroreceptor reflex interactions were studied in six healthy young adults. Carotid baroreceptors were stimulated with two intensities of neck suction during early inspiration or expiration at 100 or 150% of each subject's normal tidal volume. Sinus node responses to moderate baroreflex stimuli were inhibited by inspiration, but responses to intense stimuli were not influenced by the phase of respiration. Supranormal tidal volume did not diminish responses to inspiratory baroreflex stimuli, but significantly reduced responses to expiratory stimuli. These results provide evidence for a central respiratory baroreceptor reflex interaction in man whose quality is dependent upon the level of afferent baroreceptor activity and the depth of inspiration.     

Associations between steady-state pattern electroretinography and estimated retinal ganglion cell count in glaucoma suspects

Documenta Ophthalmologica - To estimate retinal ganglion cell (RGC) count in glaucoma suspects (GS) and ascertain its relationships with steady-state pattern electroretinography (ssPERG)...     

The lived experience of premature ovarian failure

OBJECTIVE: To describe the lived experience of women who have been diagnosed with idiopathic premature ovarian failure (POF). DESIGN: Phenomenology was used to achieve the purpose. Women were asked to share their experiences in living with premature ovarian failure during an approximately 1-hour interview. The interviews were tape-recorded, transcribed, and analyzed for emergent themes. SETTING: Interviews were conducted in the participants' homes and in a conference room in a hospital. PARTICIPANTS: The six participants were drawn from a multicultural sample of women with idiopathic POF. RESULTS: The women in this study expressed anger at their health care providers for their perceived lack of quality care they had experienced and at the insurance industry for its lack of reimbursement for fertility interventions; they expressed depression and sadness at the prospective outcome of the diagnosis, mixed emotions regarding their significant others, and sadness and resignation about their menopausal symptoms. CONCLUSIONS: Health care providers who create an environment in which women and their significant others will feel supported in asking questions, be assured that their concerns are taken seriously, and be provided with the physical and emotional resources they need can help these women to continue to build and live their lives.     

Acculturation, perceived social support, self-esteem, and pregnancy status among Dominican adolescents

In this study I explore whether pregnancy status and mainland acculturation can be used to predict perceived social support or self-esteem in 49 nulligravida and 41 primigravida adolescents of Dominican background. Self-administered questionnaires containing the Dominican American version of the Acculturation Rating Scale (DARS), the Personal Resource Questionnaire-85 (PRQ85), the Rosenberg Self-Esteem Scale (RSES), and a pregnancy-specific demographic sheet were completed in the participant's choice of Spanish or English. Neither perceived social support or self-esteem could be predicted from pregnancy status and mainland acculturation. However, mainland acculturation was found to be significantly higher among nulligravida adolescents, while no significant differences were found between the groups in relation to perceived social support or self-esteem.     

Determinants of health-promoting behavior among women ages 65 and above living in the community

This study utilized Pender's Health Promotion Model to investigate through canonical correlation analysis the role that select cognitive-perceptual factors (health self-determinism, learned helplessness, self-esteem, and perceived health) and modifying factors (age, race, marital status, education, and income) play in understanding participation of community-living older adult women (age > or = 65) in the health-promoting behaviors of health responsibility, physical activity, nutrition, spiritual growth, interpersonal relations, and stress management. These were measured by the Health-Promoting Lifestyle Profile II in a convenience sample of 107 community-living older adult women (mean age 76.7 years). Gender-specific benefits and barriers to participating in health-promoting behaviors were also explored using open-ended questions. Two significant canonical variates were demonstrated. These indicated that age, marital status, race, education, and self-esteem and the two health-related factors of perceived health and health self-determinism made statistically significant contributions to the health-promoting behaviors of physical activity, nutrition, spiritual growth, and interpersonal relations. Benefits identified included better psychological well-being, coping with the general issues of aging, social interaction, improved function, and management of existing health problems. Internal barriers focused on perceived physical difficulties with all types of health-promoting behaviors; external barriers included aspects of the activity itself, lack of support from others and structural barriers. Study results suggest that older adult women (age > or = 65) participate in health-promoting behaviors for both health enhancement and health management reasons and that barriers may be a more important determinant of older women's health-promoting lifestyle behaviors than previously described in the model.     

Mosquito vectors of West Nile Fever in Israel

West Nile fever (WNF) is endemic in Israel. In 1999, country-wide adult mosquito surveys were initiated and intensified after the 2000 country-wide outbreak of WNF in humans. In 8 consecutive yr, groups of male and female specimens of different species and from different locations were tested for infection with West Nile virus (WNV). Three species made up >87% of the total catch: Culex pipiens L. (52%), with an infection rate (IR) of 0.5; Cx. perexiguus Theobald (20%), with an IR of 2.7; and Aedes caspius Pallas (15%), with an IR of 0.6. The geographical and temporal distribution of WNV-infected mosquitoes was similar but was not parallel to the seasonal abundance of the populations. The seasonal occurrence of human cases is in correlation with the finding of WNV-positive mosquito specimens reaching a peak 1 mo later than the mosquito peak. The relative importance of the mosquito species in the epidemiology of WNF is discussed. Cx. perexiguus is considered the major vector of WNF in Israel.