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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

A mulher coronariopata no climatério após a menopausa: implicações na qualidade de vida. / The post menopausal climacteric woman with coronary artery disease: implications to quality of life.

Maria Elenita Corrêa de Sampaio Favarato 24 October 2000 (has links)
O climatério, período da vida da mulher situado entre os 35 e 65 anos, constitui uma transição entre a fase reprodutiva e a não reprodutiva. Diversas mudanças fazem parte desse período, como a menopausa, alteração da estética física, nos aspectos psicológicos e sociais. No climatério há perda da proteção do estrogênio, ocorrendo aumento significativo na incidência de doenças cardiovasculares, que, após algumas décadas, alcança aquela observada homens. A cardiopatia pode promover um comprometimento global do indivíduo afetando-o, também, nos segmentos afetivo-emocional e social. A sobreposição de duas situações que envolvem importantes aspectos psicossociais - o fim do período reprodutivo e a presença da doença cardiovascular - pode interferir negativamente na qualidade de vida dessas mulheres. O presente estudo avaliou a qualidade de vida em mulheres com doença isquêmica do coração no climatério após a menopausa. O estudo incluiu 100 mulheres após a menopausa, sendo 50 portadoras de doença arterial coronária (DAC) em seguimento no Instituto do Coração (InCor) HC-FMUSP e 50 que não apresentavam doenças associadas (grupo controle) atendidas no Centro de Saúde Escola Geraldo de Paula Souza da FSP - USP. A qualidade de vida foi avaliada mediante a utilização de dois instrumentos: uma entrevista estruturada e a aplicação do questionário genérico de avaliação de qualidade de vida ( SF - 36 ). Os grupos eram homogêneos em relação à idade da última menstruação: 49 ±3,9 anos na DAC e 49,2±3 anos no grupo controle. Os grupos também eram similares quanto à escolaridade: 84% possuíam primeiro grau (completo ou incompleto); estado civil: casadas 64% das DAC e 45% do grupo controle e viúvas 18% da DAC e 24% das controle. A atividade profissional fora do lar foi significativamente mais frequente no grupo controle (52%) e 14% nas DAC (p=0,0001). Ambos os grupos demonstraram percepções semelhantes no que se refere a sexualidade. A avaliação da qualidade de vida pelo SF - 36 mostrou melhores resultados no grupo controle em relação a: capacidade física (84 vs 50,5 na DAC); aspectos físicos (84 vs 45,5); estado geral de saúde (87,2 vs 59,1); vitalidade (69,7 vs 51,4) e escore total dos componentes mentais (70,4 vs 58,6). Tais resultados nos levaram à conclusão que a coronariopatia interfere na qualidade de vida das mulheres após a menopausa, limitando a capacidade física e o desempenho das atividades da vida diária, além de intensificar as dificuldades emocionais desse período. / Climaterium, the life period of women ranging from 35 to 65 years old, includes the transitional phase between the reproductive to the non-reproductive life period. It is a great challenging period in a woman's life: everything is changing, the menses stop, sexual hormone levels decline, physical strength and activity decrease, and important psychological and social role changes occur. The declining levels of estrogen are associated with an increase in cardiovascular disease incidence that, after some decades, reaches similar rates as men in climacteric women. All chronic diseases, particularly coronary artery disease, compromise the patient as a whole, including physical, affective-emotional and social aspects. Therefore, the overlap of two different stressful situations; the end of the reproductive life and the presence of coronary artery disease, may negatively influence the quality of life in women. The aim of this study was to analyse the quality of life of post menopausal women with coronary artery disease. The population consisted of 100 women, 50 (58±4.2 years old) with stable angiography provess coronary artery disease (CAD) undergoing treatment at The Heart Institute (InCor) - University of São Paulo medical school, Brazil (CAD group). This group was compared with 50 women (55.1±5.4 years old) without clinical evidence of coronary artery disease (control group) from a primary health care center, Centro de Saúde Escola Geraldo de Paula Souza, São Paulo - FSP- USP. The quality of life was assessed by a structured interview and by Medical outcomes study 36-item short-form health survey (SF-36) validated to the Brazilian population. They were homogenous regarding age of the last menstruation period: 49±3.9 years old in CAD and 49.2±3 years old in controls. The groups were also similar in education level, marital status (64% of CAD and 45% of controls were married; and 18% of CAD and 24% of controls were widowhood). The active working satatus was more frequent in controls than in CAD (52% vs. 14%; p= 0.0001). Both groups showed similar perceptions in their sexual experience. The evaluation of quality of life by SF-36 showed better scores for the control group in: physical functioning (84 vs. 50.5), role physical (84 vs. 45,5) , general health (87.2 vs. 59.1), vitality (69.7 vs. 51,4), p<0.0001; and total score of mental components (70.4 vs. 58.6), p = 0.028. Coronary artery disease alters the quality of life of climacteric women by limiting the physical capacity to perform ordinary daily activities and by intensifying emotional conflicts usually present in this phase of life.
122

Avaliação da função endotelial após o implante de stents com revestimento cerâmico e baixas doses de sirolimus: estudo prospectivo, duplo-cego e randomizado / Endothelial function evaluation after a ceramic surface coating stent with low dose of sirolimus implantation: a prospective, double-blinded and randomized trial

Breno Oliveira Almeida 27 March 2013 (has links)
A disfunção endotelial é uma das possíveis causas relacionadas à taxa mais elevada de trombose após o implante da primeira geração de stents farmacológicos. Se a presença do polímero durável ou elevada dose de fármacos antiproliferativos, ou ambos, são responsáveis por este fenômeno não está definido. O Estudo VESTASYNC II comparou um novo stent farmacológico, com superfície revestida por uma camada porosa de hidroxiapatita e impregnado com baixa dose de sirolimus. (55?g - stent VestaSync®) com seu equivalente não farmacológico (Stent VestaCor® ). O Vestasync II é um estudo prospectivo, randomizado (2:1) e duplo-cego, que incluiu pacientes com lesões de novo em artérias nativas com extensão menor que 14mm, com diâmetro entre 3,0 e 3,5mm. Um subgrupo composto por 20 pacientes (10 em cada grupo) submeteu-se à avaliação da função endotelial, no seguimento angiográfico de oito meses. O objetivo primário foi a comparação da vasomotricidade após o implante de stents com a mesma plataforma, com e sem eluição de sirolimus, a fim de determinar o real impacto de baixa dose do sirolimus na função endotelial. O desfecho de eficácia foi a perda luminal tardia e o porcentual de obstrução intra-stent. A avaliação da função endothelial foi realizada através da estimulação atrial com marcapasso (20ppm acima da frequência cardiaca basal até alcançar 150ppm) e o diâmetro luminal foi mensurado nas extremidades proximal e distal do stent e em um segmento controle, em estágios diferentes (repouso, sucessivas fases do estímulo e após a infusão intracoronária de nitroglicerina). A eficácia deste novo dispositivo foi confirmada por angiografia coronária quantitativa (perda luminal tardia VestaSync = 0,39 mm vs. 0,78 mm, p=0,005) e ultrassom intravascular (% obstrução VestaSync 9,3% vs. 17,6%, p= 0,005). Houve variação negativa no diâmetro luminal, entre o repouso e o estímulo máximo, nas bordas proximal (10%) e distal (8%). Entre os segmentos controles esta variação não alcançou 3%. A eluição de dose baixa do sirolimus não parece interferir na função endotelial, oito meses após o implante do stent sem polímero revestido com hidroxiapatita. / Endothelium dysfunction is among the possible causes related to higher thrombosis rates after first generation drug-eluting stents implant. Whether the presence of durable polymer or high anti-proliferative drug dose, or both, can be responsible for this phenomenon is not clear. The VESTASYNC II trial compared a novel polymer-free drug-eluting stent with a nanothinmicroporous hydroxyapatite surface coating impregnated with a low-dose of sirolimus (55?g-VestaSyncTM stent) to a bare-metal equivalent also coated with a nanothin-microporous hydroxyapatite surface (VestaCorTM stent). This is a randomized (2:1), double-blinded trial which enrolled patients with single de novo lesions in native coronary arteries from 3.0 to 3.5mm diameter and less than 14mm in length. A subset of 20 patients (10 from each group) underwent to endothelial function assessment at eight-month angiographic follow-up. The primary objective was to compare the vasomotricity after implantation of stents with the same platform, with and without drug elution, to determine the real impact of low-dose sirolimus release in endothelial function. Efficacy endpoint was in-stent late loss and % of stent obstruction. Endothelial function was assessed with atrial pacemaker stimulation (20 ppm over basal cardiac frequency until reach 150 ppm) and the lumen diameter was measured at 5 mm of proximal and distal stent edges and in a control segment, in different stages (at rest, at successive phases of stimulli and after nitroglycerin intracoronary infusion). The efficacy of this new device was confirmed by means of quantitative coronary angiography (late loss VestaSync = 0.39 mm vs. 0.78 mm, p=0.005) and intravascular ultrasound (% obstruction VestaSync 9.3% vs. 17.6%, p= 0.005). There was a negative variation in luminal diameter between basal and maximum stimulli in proximal (10%) and distal (8%) edges of both groups. Among control segments this variation did not reach 3%. The elution of low-dose of sirolimus does not seem to interfere in endothelial function 8 months after polymer-free hydroxyapatite coating stent implantation.
123

Efeito dos anticoagulantes sobre a agregabilidade plaquetária: ação da heparina de baixo peso molecular enoxaparina, e do inibidor direto da trombina dabigatrana / Influence of dabigatran and enoxaparin on platelet aggregation in patients with stable coronary artery disease

Flávia Bittar Britto Arantes 10 July 2018 (has links)
Introdução: A interação entre os anticoagulantes e a agregabilidade plaquetária é complexa. Dados laboratoriais prévios mostraram que a dabigatrana aumenta a excreção urinária de metabólito do tromboxano, indicando efeito de ativação de plaquetas. Posteriormente, dados do estudo RELY sugeriram que a dabigatrana 150mg poderia aumentar o risco de infarto do miocárdio em pacientes com fibrilação atrial. Objetivos: Comparar a influência da Dabigatrana e Enoxaparina na agregabilidade plaquetária. Métodos: Estudo prospectivo, intervencionista, realizado em pacientes com doença arterial coronariana (DAC) crônica em uso de aspirina em baixas doses. Os indivíduos foram inicialmente designados para dabigatrana 150mg, 2x/dia, por 5 dias, seguido por um período de washout de 30 dias e depois para exoxaparina 1mg/kg, 2x/dia, por um período adicional de 5 dias. Os testes de função plaquetária foram realizados no início e após cada fase de intervenção, usando agregometria de sangue total p (MEA) (objetivo primário), ELISA para determinação quantitativa de tromboxano B2 (TXB2), Verify Now Aspirin e testes de coagulação (objetivos secundários). Resultados: Em comparação com os valores basais, a dabigatrana aumentou a agregabilidade plaquetária avaliada pelo teste MEA-ASPI (+5U ± 24,1), enquanto a enoxaparina diminuiu a agregabilidade plaquetária (-6U ± 22,2), p=0,012 para a comparação entre os grupos ). O mesmo padrão foi observado usando o ensaio TXB2 (+2pg/mL para dabigatrana, -13pg/mL para enoxaparina, p = 0,011). Não houve diferenças significativas entre os dois grupos em relação aos demais testes. Individualmente, a enoxaparina diminuiu significativamente a agregabilidade plaquetária por TXB2 [33 (16,5 - 95)pg/mL vs. 20 (10-52) pg/mL, respectivamente, p = 0,026), mas não foram observadas diferenças significativas individuais com a dabigatrana em relação aos valores basais. Conclusões: Em relação à agregabilidade plaquetária, há um efeito oposto significativo da dabigatrana (aumento) em comparação com a enoxaparina (diminuição). Individualmente, foi observada uma diminuição significativa na agregabilidade plaquetária apenas com a enoxaparina, quando comparada com valores basais / Background: The interaction between anticoagulants and platelet aggregation is complex. Previous laboratory data have shown that dabigatran increases urinary thromboxane metabolite excretion, indicating platelet-activating effect. Thereafter, data from RELY trial suggested that dabigatran 150mg could enhance the risk of myocardial infarction in atrial fibrillation patients. Objectives: To compare the influence of Dabigatran and Enoxaparin on platelet aggregation. Methods: Prospective, interventional study conducted in chronic coronary artery disease (CAD) patients taking low-dose aspirin. Subjects were assigned initially to dabigatran 150mg bid for 5 days followed by a washout period of 30 days and then to exoxaparin 1mg/kg bid for an additional 5 days period. Platelet function tests were performed at baseline and after each intervention phase using multiple electrode aggregometry (MEA) (primary endpoint), ELISA for plasma quantitative determination of thromboxane B2, Verify Now Aspirin and coagulation tests as secondary endpoints. Results: In comparison with the baseline values, dabigatran increased platelet aggregation evaluated by MEAASPI test (+5U ± 24.1), whereas enoxaparin decreased platelet aggregation (- 6U± 22.2), p=0.012 for the comparison between the groups). The same pattern was observed using theTxB2 assay (+2pg/mL for dabigatran, -13pg/mL for enoxaparin, p=0.011). There were no significant differences between both groups regarding the VerifyNow Aspirin or the other platelet function and coagulation tests utilized. Individually, enoxaparin significantly decreased platelet aggregation by TXB2 [33 (16,5 - 95) pg/mL vs. 20 (10-52) pg/mL, respectivamente, p = 0.026) but no significant differences were observed with dabigatran when individually compared to baseline. Conclusions: Regarding platelet aggregation, there is a significant opposite effect of dabigatran (increase) in comparison with enoxaparin (decrease). Individually, a significant decrease in platelet aggrebability was observed with enoxaparin, but no significant differences were observed with dabigatran
124

Avaliação de parametros cardiovasculares em pacientes portadores de doença arterial coronariana, submetidos a anestesia local

Oliveira, Patricia Cristine de 17 February 2005 (has links)
Orientadores: Jose Ranali, Darceny Zanetta Barbosa / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-04T04:03:18Z (GMT). No. of bitstreams: 1 Oliveira_PatriciaCristinede_D.pdf: 14172731 bytes, checksum: a824d5516bc922567d636ef268423166 (MD5) Previous issue date: 2005 / Resumo: Este estudo avaliou a variação de parâmetros cardiovasculares em 15 portadores de DAC aguda com angina instável e infarto agudo do miocárdio prévio, submetidos a tratamento odontológico sob anestesia local com epinefrina e felipressina. MAPA e ECG foram usados para avaliar a pressão arterial sistólica (PAS), pressão arterial diastólica (PAD), freqüência cardíaca (FC), extrassístoles ventriculares (EV) e supraventriculares (ESV), depressão e elevação do segmento SI. Adicionalmente foram avaliados a alteração na troponina I (Tn-I), a saturação de oxigênio (Sp02) com oxímetro de pulso, o grau de ansiedade (através da Escala de Ansiedade Dental de Corah - EADC) e a sensação dolorosa (pela Escala de dor de 11 pontos em caixa - EC), em quatro fases: 0- basal, monitoramento com holter por 24 horas; 1 ¿ simulação do atendimento odontológico, holter por 24 horas, MAPA por 5 horas, oxímetro de pulso por 1 hora que corresponde ao período do atendimento odontológico; 2 e 3 - similar à fase 1 porém com atendimento odontológico que constituiu de anestesia local infiltrativa vestibular e submucosa palatina com 1,8mL de lidocaína 2% com adrenalina 1:100.000 ou de prilocaína 3% com felipressina 0,03Ul/mL seguida de raspagem periodontal. As soluções anestésicas foram distribuídas de forma aleatória em cada uma das fases, em um estudo cruzado, cego para o atendimento e duplo-cego para a análise dos dados. As fases 2 e 3 foram acompanhadas por um cardiologista no período correspondente ao do atendimento odontológico. Antes do início das sessões, aplicou-se a EADC e, após o atendimento odontológico (fases 2 e 3), aplicou-se a EC. Os dados de ansiedade, dor, PAS, PAD e FC foram avaliados pelo teste de Wilcoxon pareado com nível de significância de 5%, ou com fator de correção de Bonferroni para os casos de três (a= 0,016) ou quatro (a= 0,0125) testes, e as variáveis do ECG pelo teste exato de Fisher (u= 0,05). A PAS apresentou diferença significante durante o atendimento odontológico com epinefrina e a Sp02 foi diferente com tendência de apresentar menor valor na fases inicial do estudo (Fase 1). Não foram encontradas diferenças significantes entre as fases para EV, ESV, depressão de ST, Tn-I, ansiedade e dor. Pode-se concluir que a epinefrina e a felipressina tiveram tendência de alterar a PAS, PAD e Sp02 embora somente a epinefrina tenha influenciado de forma significante. Porém este aumento não foi suficiente para induzir alterações eletrocardiográficas no grupo de pacientes avaliados, podendo-se dizer que ambas as soluções, na dose e concentração utilizadas, são bem toleradas por portadores de DAC aguda o tipo AI e IAM prévio, não contra-indicando, portanto o atendimento - deste grupo de pacientes / Abstract: The purpose of this study was to evaluate the changes of cardiovascular parameters in 15 volunteers with acute CAD (instable angina and previous myocardial infarction) during dental treatment under local anesthesia with epinephrine and felypressine. Ambulatory monitoring (BPAM) and ECG were utilized to evaluate systolic (SBP) and diastolic (OBP) blood pressures, heart rate (HR), ventricular (VA) and supraventricular arrhythmias (SVA), ST depression and ST elevation, and SpO2(by pulse oximeter), troponin I (Tn-I), anxiety (by Corah's Dental Anxiety Scale - CDAE) and painful sensibility (by The 11-point Box Scale - BS-11), in 4 phases: 0- baseline, 24 hours holter monitoring; 1 - dental treatment simulation, 24 hours holter, 5 hours MAPA, 1 hour pulse oximeter, corresponding the dental treatment; 2 and 3 - similar to phase 1, more dental treatment with periodontal scaling, made under maxillary and palatine local anesthesia using 1.8ml of 2% lidocaine with 1:100.000 epinephrine (Epi) or 3% prilocaine supplemented 0,03 IUlml of felypressine (Fel), in a double blind cross-over study. Phases 2 and 3 were looked closely by a cardiologist. The COAE was applied at the beginning of the sections and after the dental treatment (phases 2 and 3) was applied the BS-11. The anxiety date, painful sensibility, SBP, DBP and HR were evaluated by Wilcoxon test (5% levei of significance or Bonferroni correction factor for the cases of three, u= 0.016 or four, u= 0.0125 tests) and the data of ECG were analyzed by Fisher test (u= 0.05). The SBP presented significant difference during dental treatment with epinephrine and SpO2was different with tendency to showed lowers values in phase 1. Significant differences were not found among the phases for VA, SVA, ST depression, Tn-I, anxiety and painful sensation. It can be concluded that epinephrine and felypressine resulted changes in SBP, OBP and SpO2, but only' epinephrine caused significant difference. However the SBP did not increased sufficiently to cause ECG alterations in this group, and both of them, in utilized doses and concentrations are well tolerated by patients with acute CAD (instable angina and myocardial infarction), it did not presented absolute contraindications to dental treatment in this grou / Doutorado / Farmacologia, Anestesiologia e Terapeutica / Doutor em Odontologia
125

Sepelvaltimotautia sairastavien elämänlaatu ja elämänkulku:pitkittäistutkimus lääkkeillä, pallolaajennuksella tai ohitusleikkauksella hoidettujen kokemuksista

Lukkarinen, H. (Hannele) 22 November 1999 (has links)
Abstract The purpose of this prospective, clinical longitudinal survey was to describe, explain and understand the subjective quality of life and life course of patients with coronary artery disease. The study subjects' quality of life was assessed at the time of the onset of coronary artery disease, during the treatment process and during rehabilitation. Altogether 280 patients participated, of whom 80 were treated with medication, 100 with transluminal angioplasty, and 100 with bypass surgery. The study population consisted of 189 men and 91 women. At the baseline, the study subjects' self-care agency was measured with the Self-As-Carer Inventory (SCI). The subjects health-related quality of life was assessed with the Nottingham Health Profile (NHP) at the baseline as well as at 6 and 12 months after the procedure. The qualify of life of coronary artery disease patients was compared to the quality of life of an age- and sex-matched Finnish adult population (N = 3600) by using a previous standardisation of the NHP instrument. One year after the treatment, 19 patients who had undergone either bypass surgery or angioplasty attended thematic interviews at their homes. Triangulation of methodologies, methods and data collection was used in the study. The qualitative analysis of personal experiences was carried out using the method of phenomenological psychology described by Amedeo Giorgi based on Husserl's descriptive phenomenology. Before the treatment procedures, the quality of life of the coronary artery disease patients was significantly poorer than that of the age-matched adult population on the dimensions of energy, pain, emotional reactions, sleep and mobility. Moreover, the female patients with coronary artery disease had poorer health-related quality of life than the corresponding male patients, especially on the dimensions of energy, sleep, emotional reactions and mobility. The quality of life of the patients who had undergone angioplasty or bypass surgery was statistically significantly better one year after surgery on the dimensions of energy, pain and mobility. Their quality of life had, however, deteriorated on the dimensions of emotional reactions and social isolation. The thematic interviews revealed two kinds of life course: one with an active attitude towards treatment and a re-orientation of life course and another with a passive attitude towards treatment and a maintenance of the old principles in one's life course. A need for rehabilitation was indicated by an onset of the illness suddenly at a relatively young age, termination of an active working career, financial problems, dissatisfaction with the outcome of treatment, problems in family relations, and a desolate view of the future. An increased need for psychosocial support was especially common among women, subjects with recurrence and both male and female subjects in the youngest age group. According to the subjects, after-care failed to meet their needs or to address their problems. No continuous and confidential therapeutic relationships emerged. The problems included inadequate knowledge of one's condition and a lack of detailed instructions concerning the permissible degree of exertion after treatment. The patients felt they needed rehabilitation groups with coronary artery disease patients similar to themselves. The study yielded new knowledge about the health-related quality of life of coronary artery disease patients, the connections between the treatment methods and the changes in the patients' quality of life during one year and the patients' experiences at the time of the diagnosis and during the periods of treatment and after-care. This evidence-based knowledge can be used to develop the treatment and rehabilitation of coronary artery disease patients and to plan further research.
126

The impact of multiple behaviour health intervention strategies on coronary heart disease risk, health-related physical fitness, and health-risk behaviours in first year university students

Leach, Lloyd L January 2011 (has links)
Philosophiae Doctor - PhD / Background: There is compelling body of evidence that coronary heart disease (CHD) risk factors are present in people of all ages. The extent to which the problem exists in university students in South Africa (SA) has not been confirmed in the literature. Furthermore, the effects of physical activity, physical fitness, diet and health behaviours on CHD risk factors has not been studied extensively in SA and needs further investigation. Aim: The aim of the study was to assess the impact of multiple behaviour health intervention strategies on CHD risk, health-related physical fitness(HRPF) and healthrisk behaviours (HRB) in first year students at the University of the Western Cape (UWC). It was hypothesized that exposure to various health behavioural interventions would reduce CHD risk factors in subjects at moderate risk, and improve health-related physical fitness, as well as health-risk behaviours.Methods and Study Design: An experimental study design was used wherein subjects at moderate risk for CHD were identified and exposed to multiple health behavioural interventions for 16 weeks in order to determine the impact of the various interventions on CHD risk, health-related physical fitness and health-risk behaviours. Population and Sample: The target population consisted of first year students at UWC aged 18 – 44 years who were screened and a sample of 173 subjects were identified as being at moderate risk for CHD. Next, the subjects were randomly assigned to a control and four treatment groups, namely, health information, diet, exercise, and a multiple group that included all three treatments. The intervention, based upon Prochaska‟s Transtheoretical Model of behaviour change, continued for a period of 16 weeks and, thereafter, the subjects were retested. Data Collection Process: Subject information was obtained using self-reported questionnaires, namely, the physical activity readiness questionnaire (PAR-Q), the stages of readiness to change questionnaire (SRCQ), the international physical activity questionnaire (IPAQ), and the healthy lifestyle questionnaire (HLQ), together with physical and hematological (blood) measurements. The measurements taken before and after the intervention programme were the following:• Coronary heart disease risk factors, namely: family history, cigarette smoking, hypertension, obesity, dyslipidemia, impaired fasting glucose and a sedentary lifestyle; • Health-related physical fitness, namely: body composition, cardiovascular fitness, muscular strength, muscular endurance, and flexibility; and • Health-risk behaviours, namely: physical activity, nutrition, managing stress, avoiding destructive habits, practising safe sex, adopting safety habits, knowing firstaid, personal health habits, using medical advice, being an informed consumer, protecting the environment and mental well-being. Types of interventions: A control group was used in which subjects did not receive any treatment. The health behavioural interventions were arranged into four groups of subjects that received either the health information, diet, exercise or a combination of all three individual treatments. Statistical analyses of data: In the analyses of the data, the procedure followed was that where the outcome variable was approximately normally distributed, the groups were compared using a two-sample t-test. For outcomes with a highly non-normal distribution or ordinal level data, the nonparametric Wilcoxon Rank Sum test was used for group comparisons. To account for baseline differences, repeated measures analysis of variance was used. In the case where nonparametric methods were appropriate, analysis was done using Cochran-Mantel-Haenszel (CMH) methodology stratifying on the baseline values. For the case of nominal level outcomes, groups were compared by Chi-square tests for homogeneity of proportions. When baseline values needed to be incorporated into the analysis, this was done using CMH methodology. Main Outcome Measures: The main outcome measures tested in the study related to the three areas of investigation, namely: • Modifiable CHD risk factors: systolic and diastolic blood pressure, cigarette smoking, total cholesterol (TC) concentration, high-density lipoprotein (HDL) cholesterol concentration, low-density lipoprotein (LDL) cholesterol concentration, triglycerides, fasting glucose, body mass index, waist circumference, waist-hip ratio and physical inactivity; • Health-related physical fitness: body mass, percent body fat, absolute body fat, percent lean body mass, absolute lean body mass, the multi-stage shuttle run, handgrip strength, repeated sit-ups in a minute, and the sit-and-reach test; and • Health-risk behaviours: physical activity, nutrition, managing stress, avoiding destructive habits, practising safe sex, adopting safety habits, knowing first aid, personal health habits, using medical advice, being an informed consumer, protecting the environment and mental well-being. Results: The results showed significant decreases for body mass, waist and hip circumferences, resting heart rate, systolic blood pressure, cigarette smoking and a sedentary lifestyle (p < .05) primarily in the multiple group. No significant differences were recorded for blood biochemistry, however, favourable trends were observed in the lipoprotein ratios. For health-related physical fitness, only the multiple group showed significant (p < .005) improvements in predicted maximal oxygen consumption ( O2max), body composition, muscular strength and muscular endurance. The exercise group also recorded significant differences in muscular endurance. In all groups, including the controls, no significant differences were found for stature, waist-hip ratio, and flexibility at pre- and post-test. Overall, the participants reflected positive health behaviours, especially for managing stress, avoiding destructive habits, practising safe sex, adopting safety habits, personal health habits and mental well-being at pre- and post-test. The intervention programme had a corrective influence on providing the participants with a more realistic perception of their level of physical activity and nutritional habits. The participants scored poorly on being informed consumers and for recycling waste both at pre- and post-test. A substantial net reduction in CHD risk factors as well as in cumulative risk was achieved with treatment that impacted positively on the re-stratification of participants at moderate risk. In terms of treatment efficacy, the dietary intervention appeared to be the least effective (10.91%), with health information and exercise sharing similar levels of efficacy (32.81% and 33.93%, respectively) and, the combined treatment in the multiple group stood out as the most effective treatment (50.00%), and supported the hypothesis of the study. Conclusions: The net and cumulative decline in CHD risk factors was substantial with treatment and was directly related to the number of treatments administered. The evidence suggests that such multiple health behaviour interventions when implemented through a university-based setting have substantial benefits on reducing CHD risk and may be of considerable public health benefit. Key messages • Despite being a relatively educated population, a substantial number of first year university students are at considerable heart disease risk. • Physical inactivity constitutes one of the main CHD risk factors amongst first year students and, together with smoking, place many of them at moderate CHD risk. • The effectiveness of health behavioural strategies designed to modify lifestyle and prevent coronary heart disease is supported by this study.
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Comparison of carotid plaque characteristics, arterial remodelling changes, left ventricular geometry and inflammatory markers in patients with chest pain and unobstructed coronary arteries, chronic stable angina or acute coronary syndromes

Balakrishnan Nair, Satheesh January 2013 (has links)
Introduction: Atherosclerosis remains asymptomatic until it progresses to cause flow-limiting disease. Identifying patients at high risk in the early stages of the atherosclerotic process may allow modification of cardiovascular risk by effective preventive strategies. Various non-invasive tests have been studied and have shown promising results in predicting future adverse cardiovascular events. The objective of this study was to establish the carotid ultrasonographic markers that best correlate with angiographic coronary artery disease (CAD) and the relationship between left ventricular geometry, carotid atherosclerosis, biomarkers and CAD in patients with unobstructed coronary arteries, chronic stable angina (CSA) and acute coronary syndromes (ACS). Methods: Carotid ultrasound examination, echocardiography and serum biomarker estimation were performed in consecutive patients who underwent coronary angiography for evaluation of stable or acute chest pain. Results: A total of 146 subjects were recruited into the study with a mean age of 56.9 ± 10.6 (range 29 to 85) years; 120 were men (82%) and 26 (18%) women. Twenty-one percent of the study population had unobstruced coronaries, 42% had stable CAD and 37% had presented with ACS. There was no significant difference in the carotid intima media thickness (CIMT) measurements between the three groups. CIMT correlated with abnormal left ventricular geometry but not with the presence or severity of CAD. The presence of carotid plaque and plaque score correlated with obstructive CAD, but was not significantly different between stable CAD and ACS patients. There was a trend towards more echogenic plaque in the stable CAD group. The composite score of IMT and plaque was positively correlated with the presence and severity of CAD. The averaged myocardial peak systolic and early diastolic velocities were significantly lower in those with obstructive CAD. CRP and osteopontin levels were higher in the ACS patients. Conclusions: Carotid plaque and not CIMT was associated with angiographic coronary artery disease. Averaged systolic and early diastolic myocardial velocities by tissue doppler imaging correlated with obstructive CAD. Novel serum biomarkers are promising and further studies are needed.
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Circulating Progenitor Cell Therapeutic Potential Impaired by Endothelial Dysfunction and Rescued by a Collagen Matrix

Marier, Jenelle January 2012 (has links)
Angiogenic cell therapy is currently being developed as a treatment for coronary artery disease (CAD); however, endothelial dysfunction (ED), commonly found in patients with CAD, impairs the ability for revascularization to occur. We hypothesized that culture on a collagen matrix will improve survival and function of circulating progenitor cells (CPCs) isolated from a mouse model of ED. Overall, ED decreased the expression of endothelial markers in CPCs and impaired their function, compared to normal mice. Culture of CPCs from ED mice on collagen was able to increase cell marker expression, and improve migration and adhesion potential, compared to CPCs on fibronectin. Nitric oxide production was reduced for CPCs on collagen for the ED group; however, CPCs on collagen had better viability under conditions of serum deprivation and hypoxia, compared to fibronectin. This study suggests that a collagen matrix may improve the function of therapeutic CPCs that have been exposed to ED.
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Glycogen Synthase Kinase 3 Beta Inhibition for Improved Endothelial Progenitor Cell Mediated Arterial Repair

Hibbert, Benjamin January 2013 (has links)
Increasingly, cell-based therapy with autologous progenitor populations, such as endothelial progenitor cells (EPC), are being utilized for treatment of vascular diseases. However, both the number and functional capacity are diminished when cells are derived from patients with established risk factors for coronary artery disease (CAD). Herein, we report that inhibition of glycogen synthase kinase 3 (GSK) can improve both the number and function of endothelial progenitor cells in patients with CAD or diabetes mellitus (DM) leading to greater therapeutic benefit. Specifically, use of various small molecule inhibitors of GSK (GSKi) results in a 4-fold increased number of EPCs. Moreover, GSKi treatment improves the functional profile of EPCs through reductions in apoptosis, improvements in cell adhesion through up-regulation of very-late antigen-4 (VLA-4), and by increasing paracrine efficacy by increasing vascular endothelial growth factor (VEGF)secretion. Therapeutic improvement was confirmed in vivo by increased reendothelialization(RE) and reductions of neointima (NI) formation achieved when GSKi-treated cells were administered following vascular injury to CD-1 nude mice. Because cell-based therapy is technically challenging, we also tested a strategy of local delivery of GSKi at the site of arterial injury through GSKi-eluting stents. In vitro, GSKi elution increased EPC attachment to stent struts. In vivo, GSKi-eluting stents deployed in rabbit carotid arteries resulted in systemic mobilization of EPCs, improved local RE, and important reductions in in-stent NI formation. Finally, we tested the ability of GSKi to improve EPC-mediated arterial repair in patients with DM. As in patients with CAD, GSKi treatment improved EPC yield and diminished in vitro apoptosis. Utilizing a proteomics approach, we identified Cathepsin B (catB) as a differentially regulated protein necessary for reductions in apoptosis. Indeed, antagonism of catB prevented GSKi improvements in GSKi treated EPC mediated arterial repair in a xenotransplant wire injury model. Thus, our data demonstrates that GSKi treatment results in improvements in EPC number and function in vitro and in vivo resulting in enhanced arterial repair following mechanical injury. Accordingly, GSK antagonism is an effective cell enhancement strategy for autologous cell-based therapy with EPCs from high risk patients such as CAD or DM.
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Papel das estatinas na lesão miocárdica e nos marcadores inflamatórios em pacientes submetidos a implante eletivo de stent coronário / Effec of statin therapy on inflammation and myocardial injury in satable coronary artery disease patients submitted to coronary stent implantationt

Gilmar Valdir Greque 13 December 2012 (has links)
Introdução. A elevação dos marcadores inflamatórios e de necrose miocárdica, após intervenção coronária percutânea, pode interferir nos resultados clínicos. No entanto, pouco se conhece sobre a terapia com estatinas pré-procedimento na redução destes marcadores em pacientes estáveis de baixo risco. Objetivo. Avaliar se o uso de estatina, antes do implante eletivo de stent coronário (ISC), reduz os níveis plasmáticos de marcadores inflamatórios e de necrose miocárdica, em pacientes com doença arterial coronária (DAC), estáveis e de baixo risco. Métodos. Neste estudo observacional prospectivo, 100 pacientes (n=50 em uso de estatina vs n=50 sem uso de estatina) com DAC estável foram submetidos à implante eletivo de stent coronário. Marcadores inflamatórios (proteína C reativa [PCR], interleucina[IL] -6, fator de necrose tumoral- e matrix metaloproteinase-9) e marcadores de necrose miocárdica (troponina I e CK-MB ) foram dosados antes e 24 horas após o implante eletivo de stent coronário. Resultados. Todos os pacientes apresentaram um aumento significativo de PCR e IL-6, após ISC. No entanto, esse aumento foi anulado em pacientes que faziam uso de estatina antes de ISC em relação àqueles que não tomavam estatina: 75% vs 150% (p <0,001) e 192% vs 300% (p <0,01) respectivamente. Os outros marcadores pró-inflamatórios foram semelhantes para os dois grupos de pacientes. Troponina I e CK-MB não se alterou, após ISC, independentemente, da terapia com estatina anterior ou não. Conclusão. O pré-tratamento com estatina reduz a magnitude da inflamação após ISC, demonstrada por aumentos significativamente menores de PCR e IL-6, em pacientes com DAC, estável e de baixo risco. Lesão miocárdica periprocedimento foi irrelevante e não foi afetada pela terapia com estatina pré-procedimento nesta população / Background. The elevation of markers of inflammatory and myocardial necrosis after percutaneous coronary intervention may interfere on clinical outcome. However, little is known concerning preprocedural statin therapy on the reduction of these markers in stable patients at low-risk. Objective. To evaluate if statin therapy prior to elective coronary stent implantation (CSI) reduces the plasma levels of markers inflammatory and myocardial necrosis in patients with low-risk stable coronary artery disease (CAD). Methods. In this prospective, observational study, 100 patients (n=50 on statin therapy vs n=50 not on statin) with stable CAD underwent elective CSI. Inflammatory (C-reactive protein [CRP], interleukin [IL]-6, tumor necrosis factor-a and matrix metalloproteinase-9) and myocardial necrosis markers (troponin I and CK-MB) were determined before and 24 hours after CSI. Results. All patients presented a significant increase of CRP and IL-6 after CSI. However, this increase was blunted in patients on statin therapy prior to CSI than those without statin therapy: 75% vs 150% (p<0.001), and 192% vs 300% (p<0.01), respectively for PCR and IL-6. The other pro-inflammatory markers were not affected in both sets of patients. Troponin I and CK-MB did not change after CSI regardless of previous statin therapy or not. Conclusions. Previous treatment with statins reduces the magnitude of procedural inflammation, denoted by markedly lower increases of CRP and IL-6 levels, in elective CSI on stable CAD patients. Periprocedural myocardial injury was not significant in this population

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