published_or_final_version / abstract / Community Medicine / Doctoral / Doctor of Philosophy

The purpose of this study was to describe the relationships among perceptions of privacy, powerlessness, and subjective sleep characteristics in hospitalized adults with coronary heart disease. Thirty subjects, 48 to 92 years old who were hospitalized for suspected or confirmed coronary heart disease, completed three questionnaires. Negative relationships were found between patient privacy and powerlessness (r = -.44) and between powerlessness and the subjective sleep characteristics of sleep effectiveness (r = -.30). Feelings of powerlessness were negatively related to total number of days of (r = -.50) and number of days in the Coronary Care Unit (CCU) (r = -.41). The number of days in the CCU was positively related to sleep disturbance (r =.30). Age was negatively related to patient privacy (r = -31) but positively related to powerlessness (r =.33) and sleep supplementation (r =.35). A better understanding of the hospital environment enhances the planning of nursing care for hospitalized patients.

M.A. / Please refer to full text to view abstract

published_or_final_version / Medicine / Master / Master of Research in Medicine

Objective: To examine the effect of exercise-based cardiac rehabilitation program for secondary prevention of coronary heart disease on cardiac-related mortality, recurrent cardiovascular event and quality of life. Methods: All studies published between 1990 and 2013 in PubMed, and from 1980 to 2013 in EMBASE, which evaluated the effectiveness of exercise-based cardiac rehabilitation program for coronary heart disease. Using the specific keywords “Cardiac rehabilitation”, “Coronary heart disease” OR “Ischemic heart disease” [MeSH], “Exercise” OR “Physical activities” AND “Quality of life” OR “Mortality” AND Cardiovascular events” were searched. A total of 7randomized controlled trials out of 5,051articles from PubMed and 117 articles from EMBASE were included in this systematic review. The primary outcome measures used in the included seven studies were HRQOL, restenosis, cardiac event, cardiac related mortality. Similar demographic and clinical characteristics of the subjects between the intervention and the control groups were recorded. The studies were from five countries. The average age of the subjects in the seven studies was 61years, the average half of them have history of myocardial infarction. Though there were discrepancies among the results generated in the included studies, the potential benefits of exercise-based cardiac rehabilitation could be seen. Results: Compared with the non-exercise-based cardiac rehabilitation, patients allocated to the exercise-based cardiac rehabilitation program had greater improvement in HRQOL and reduction of cardiac events. The result of reducing restenosis was inconsistent. The cardiac related mortality is not significant difference between exercise-based and non-exercise-based cardiac rehabilitation. / published_or_final_version / Public Health / Master / Master of Public Health

Coronary Artery Bypass Graft(CABG) Surgery increases blood flow to the endangered myocardium but does not slow the process of atherosclerosis. The only way to slow the process of coronary artery disease is to acknowledge the risk factors present and minimize or totally eliminate them from an individual's lifestyle. Men and women respond differently to stress and lifestyle modifications. The purpose of this study was to determine if there was a difference between genders in compliance to a heart healthy lifestyle pre and post CABG surgery.Thirty men and thirty women who had CABG surgery at least one year earlier were interviewed to assess coronary artery disease risk. The procedure for the protection of human subjects were followed. The instrument used was the RISKO Heart Hazard Appraisal Tool. This instrument was developed in 1985 by the American Heart Association and scored individuals on systolic blood pressure, weight, serum cholesterol level and cigarette smoking habits. Pre-operative records were also reviewed using the same tool to assess individuals preoperative risk. The research design used was 2 x 2 repeated measures. Data were analyzed using 2 x 2 repeated measures analysis of variance (ANOVA).Two findings were discovered. First there was a statistically significant difference between men and women (F=5.82 p=0.019) with men scoring lower RISKO scores than women, indicating lower risk and better compliance to a heart healthy lifestyle, both pre- and postoperatively. Second there was a significant difference between preand postoperative RISKO scores in the total population (F=8.77 p=0.004). Postoperative RISKO scores were lower indicating an improvement in heart healthy lifestyle. There was no statistically significant difference between genders in the difference of pre- and postoperative RISKO scores (F=2.56 p<.115). The significance of this study was that it looked specifically at gender differences and assessed disparities in cardiovascular risk factors and the impact of surgery on men and women.This study found that overall, men had lower RISKO scores than women. Both genders also had improved RISKO scores postoperatively from preoperatively. No statistically significant difference between genders of the RISKO scores from preoperatively to postoperatively was found. Education needs to continue to play a big part in the cardiac rehabilitation process for both genders and specifically women need to become the target of further research and education to improve compliance to a heart healthy lifestyle. / School of Nursing

M.Sc. (Psychology) / Please refer to full text to view abstract

D.Litt. et Phil. (Psychology) / Over the past four decades we have witnessed the emergence of amazingly sophisticated means of cardiovascular diagnosis and therapy. For the first time in many years, some Western countries could report a decline in cardiovascular deaths. During this same span of years we have witnessed the remarkable development of an array of technological achievements that include the means for invasive diagnostic procedure such as cardiac catherization, and non-invasive methods of echocardiography, magnetic, radio-isotopic and positron imagery which provide detailed diagnostic and prognostic information. This innovations along with synthetic grafts have permitted surgical interventions that would not have been conceivable at the outset of this cardiovascular odyssey. Another major advance has been the appearance of new pharmacological modalities; the diuretics, the beta-adrenergic receptors and angiotension converting enzyme inhibitors, the calcium antagonists and other anti-hypersensitive agents, a spectrum of antiarrhythmic compounds, anticoagulants and fibrinolytic therapy, and the promise of still more innovative and novel modes of therapy which will appear via genetic engineering. Over the past years there has been equally significant development in the area of cardiovascular epidemiology. These advances include the demonstration of validity and the efficacy of various therapeutic programmes by the unique development of complex multi-center trials, as well as long-term population-based studies. Through this endeavours specific risk factors that impart independent risk ofpremature cardiovascular morbidity and mortality has been identified. Some of these risk factors are clearly not modifiable such as advancing years, male gender and race. Others are at least partly modifiable: predisposition to diabetes myelitis and increased body mass. By virtue of multi-center trials we have clear evidence that cigarette smoking, rising systolic and diastolic arterial pressures, serum cholesterol levels, and diabetes are modifiable. It is a known fact that not all individuals with coronary artery disease are cured by medication or by means of a surgical intervention. In addition to this, the reduction of traditional biomedical risk factors have been shown to be insufficient in averting the reocclusion and the further occlusion of coronary arteries in patient populations.

M.Cur. (Intensive General Nursing) / It appears that the emotions of patients in.the process of undergoing coronary artery bypass graft surgery have an influence on the rate of mortality. Patients that must undergo this surgery often find themselves in a short term dependent position. The purpose of this study is to determine if the life-style functioning of the patients can be improved by means of a pre-operative rehabilitative educational programme introduced by the professional nurse. A conceptual framework of reference was compiled after completion of the literature review. This served as the preliminary structure of the pre-operative educational programme. The programme consists of three three components, viz. an education booklet, an educational evaluating model and the educationist. A quasi-experimental study was performed on 4 groups (2 experimental groups and 2 control groups) to determine the effect of the structured pre-operative educational programme on the following three factors: - satisfaction with self, others and life; -avoidance of hope threats and -anticipation of a future. From these factors three null hypotheses were formed. An analysis of the data indicated a significant difference between the groups that followed the programme and the groups that did not follow the programme. The null hypotheses were thereafter rejected. The primary recommendation of the study is that all patients in the process of undergoing coronary artery bypass graft surgery should follow a pre-operative educational programme. This programme has a positive influence on the life-style functioning of the patient and will thus promote the process of rehabilitation.

Coronary Artery Disease (CAD) is one of the most common cardiovascular disorder in adults. CAD often results in myocardial infarction or angina (Wilson, 2003:21). It is an accepted fact that the incidence of CAD has reached endemic proportions in South Africa (Venter, 1993:15). Coronary Artery Bypass Graft (CABG) surgery, Percutaneous Transluminal Coronary Angioplasty (PTCA) and insertion of a coronary stent are major therapeutic approaches to the treatment of CAD. However, these procedures do nothing to correct the underlying disease process (Hunt, Hendrata, Myles, 2000:389; Venter, 1993:15). Due to physiological changes patients suffering from CAD are expected to make lifestyle adaptations, in order to improve quality of life and prevent further damage to coronary arteries (Gotto, 1987:29). It is suspected that patients do not always adapt their lifestyle when they suffer from CAD, or if they do, do not maintain these adaptations. The following question emerges: • Do patients with coronary artery disease adapt their lifestyle and if they do, do they maintain these adaptations? The purpose of this study is to explore and describe the extent to which patients with CAD who underwent CABG, PTCA or insertion of a coronary stent adapt their lifestyles and to what extent they maintain these adaptations. Secondly, the purpose is to set guidelines to help with the improvement of lifestyle adaptations and contingency of adaptations. The objectives of the study is to explore and describe the extent to which patients with CAD adapt their lifestyles following CABG surgery, PTCA or insertion of a i coronary stent, the comparison of the extent of these lifestyle adaptations after two and four months and to set guidelines to improve the extent and contingency of lifestyle adaptations. An explorative and descriptive study was done in order to explore and describe the extent to which patients with CAD, who underwent CABG surgery, PTCA or insertion of coronary a stent, adapted their lifestyle, and to determine the maintenance of these lifestyle adaptations. For the purpose of this study questionnaires, based on a conceptual framework, were designed. The questionnaires enabled the researcher to explore and describe the lifestyle adaptations that patients with CAD underwent. The study was conducted in five private hospitals in Gauteng. The data obtained confirmed that patients suffering from CAD do adapt their lifestyle after having CABG surgery, PTCA or insertion of a coronary stent. Data also showed that the presence of a cardiac rehabilitation centre at the hospital where participants were treated, has a significant influence on patients’ ability to adapt their lifestyle and to maintain this new lifestyle. / Dr. W.O.J. Nel Ms. W. Jacobs