• Orthostatic blood pressure and heart rate responses after coronary artery bypass graft surgery

      Cahill, Cheryl A.; Lester, Arnette Sandland, 1952- (The University of Arizona., 1990)
      A quasi-experimental study was conducted to compare preoperative and postoperative postural responses to position change. A convenience sample of 30 men and women admitted for elective coronary artery bypass graft (CABG) surgery performed supine to sitting and supine to standing position changes prior to surgery and on postoperative day two or three. An ANOVA with repeated measures compared the responses of systolic blood pressure, diastolic blood pressure and heart rate. Systolic blood pressure exhibited a significant change from preoperative to postoperative measurements. Diastolic blood pressure remained the same; heart rate changed over time, but no significant preoperative to postoperative changes occurred. Comparison of normotensive and hypertensive subjects revealed reduced postoperative responsiveness in the hypertensive subjects for systolic blood pressure and heart rate. Nurses caring for postoperative CABG patients should anticipate a reduction in blood pressure and an increase in heart rate upon standing.
    • Relationships among perimenstrual symptoms, stressful life events, anxiety and cortisol levels

      Cahill, Cheryl A.; Richards-Barna, Anne, 1963- (The University of Arizona., 1990)
      The purpose of this study was to examine the relationship between stress and perimenstrual symptoms. Stress was studied in terms of major life events, self-reported anxiety, and blood cortisol levels. Fifteen women who demonstrated negative affect perimenstrual symptoms and seventeen women who were identified as asymptomatic charted their symptoms daily for three menstrual cycles. During this time, state anxiety and blood cortisol levels were measured twice a week. The results of this study support a positive relationship between stressful life events, trait anxiety, state anxiety, and perimenstrual symptoms. However, cortisol levels were not correlated with either perimenstrual symptoms or state anxiety. There was a difference between the symptomatic and the asymptomatic groups in terms of stressful life events and trait anxiety. There was also a significant difference in state anxiety between the two groups when measured during the perimenstrual phase, however, not during the postmenstrual phase. There were no significant changes in cortisol levels between groups or cycle phases.