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Resumos053BÁSICAEVIDENCE THAT THE VASODILATOR ANGIOTENSIN-(1-7)-MAS AXIS PLAYSA CRITICAL ROLE IN ERECTILE FUNCTIONCosta-Gonçalves AC 7 , Leite R 2 , Fraga-Silva RA 1 , Pinheiro SV 1 , Reis AB 3 , Reis FM 4 ,Touyz RM 56 , Webb RC 2 , Alenina N 7 , Ba<strong>de</strong>r M 7 , Santos RAS 11Department of Physiology, Fe<strong>de</strong>ral University of Minas Gerais, Belo Horizonte, Minas Gerais,Brazil, 2 Department of Physiology, Medical College of Georgia, Augusta, Georgia, USA, 3 SurgeryDepartment, Medical School of Fe<strong>de</strong>ral University of Minas Gerais, Belo Horizonte, Minas Gerais,Brazil, 4 Gynecology and Obstetrics Department, Fe<strong>de</strong>ral University of Minas Gerais, Belo Horizonte,Minas Gerais, Brazil, 5 Kidney Research Centre, Ottawa Health Research Institute,University of Ottawa, Ontario, Canada, 6 Clinical Research Institute of Montreal, University ofMontreal, Quebec, Canada, 7 Max-Delbrück Center for Molecular Medicine, Christan-Albrechts-University of Kiel, Berlin, GermanyThe vasodilator/antiproliferative pepti<strong>de</strong> angiotensin-(1-7) [Ang-(1-7)] is released into the corpuscavernosum sinuses, but its role on erectile function has not yet been <strong>de</strong>fined. In this study wesought to <strong>de</strong>termine whether Ang-(1-7) and its receptor Mas play a role in erectile function. TheAng-(1-7) receptor Mas was immunolocalized in human and rat corpus cavernosum by confocalmicroscopy. Infusion of Ang-(1-7) into corpus cavernosum at a rate of 15.5 pmol/Kg/min potentiatedthe elevation of the corpus cavernosum pressure (CCP) induced by electrical stimulation of themajor pelvic ganglion (MPG) in rats, without altering mean arterial pressure (MAP) (CCP/MAP,0.27 ± 0.04, 0.31 ± 0.05, 0.54 ± 0.08 vs 0.54 ± 0.08, 0.63 ± 0.06, 0.78 ± 0.04, for 1.0, 1.2 and 1.5V, respectively. P < 0.05). The facilitatory effect of Ang-(1-7) was completely blunted by thespecific Ang-(1-7) receptor blocker A-779 and L-NAME. NO release in the corpus cavernosumwas evaluated with the fluorescent dye DAF-FM (4-amino-5 methylamino-2’,7’-difluorofluorescein diacetate ). Incubation of human, rat and mouse corpus cavernosum stripswith Ang-(1-7) at 10 nmol/L resulted in an increase of NO release. This effect was completelyabolished in mas-<strong>de</strong>ficient mice. More importantly, genetic <strong>de</strong>letion of Mas resulted in compromise<strong>de</strong>rectile function as <strong>de</strong>monstrated by penile fibrosis and severely <strong>de</strong>pressed response to electricalstimulation of the MPG (CCP/MAP, 0.54 ± 0.11, 0.68 ± 0.1, 0.71 ± 0.1, 0,75 ± 0.1 vs 0.3 ± 0.03, 0.3± 0.02, 0.33 ± 0.03, 0.43 ± 0.1, for 1.5, 2.0, 2.5 and 3.0 V, respectively. P < 0.001). Furthermore,the attenuated erectile function of DOCA-salt hypertensive rats was fully restored by Ang-(1-7)administration (CCP/MAP, 0.23 ± 0.05, 0.3 ± 0.06, 0.33 ± 0.1 vs 0.46 ± 0.03, 0.57 ± 0.03, 0.57 ±0.08, for 2.0, 2.5 and 3.0 V, respectively. P < 0.05). Together these data provi<strong>de</strong> strong evi<strong>de</strong>ncefor a key role of the Ang-(1-7)-Mas axis in erectile function.054EPIDEMIOLOGIA E FISIOPATOLOGIAANÁLISE ANGIOGRÁFICA REVELA QUE CAMUNDONGOS ATEROSCLERÓ-TICOS FÊMEAS IDOSAS SÃO PROTEGIDAS CONTRA INSUFICIÊNCIA VAL-VULAR AÓRTICA1Thiago <strong>de</strong> Melo Costa Pereira, 2 Vitor Arantes Pazolini, 2 José Airton <strong>de</strong> Arruda,1,3Elisardo Corral Vasquez, 1 Silvana dos Santos Meyrelles1Programa <strong>de</strong> Pós-Graduação em Ciências Fisiológicas, 2 Hospital Universitário Cassiano Antônio<strong>de</strong> Morais, UFES e, 3 EMESCAMFUNDAMENTOS: Sabe-se que a senescência bem como o climatério são importantes fatores na progressão<strong>de</strong> distúrbios cardiovasculares (DCV), tais como a aterosclerose. Também está bem estabelecido que o camundongo<strong>de</strong>ficiente <strong>para</strong> a apolipoproteina E (ApoE) é uma importante ferramenta <strong>para</strong> o entendimento <strong>de</strong>stadoença. Embora este animal tenha somente 10% do peso do rato, é importante viabilizar o uso <strong>de</strong> técnicas<strong>de</strong> <strong>de</strong>tecção <strong>de</strong> lesões cardiovasculares in vivo, que permitam um melhor entendimento <strong>de</strong>ste mo<strong>de</strong>lo animalnos DCV.OBJETIVOS: O presente trabalho propõe adaptar a técnica da angiografia humana <strong>para</strong> estudos em camundongosApoE, a fim <strong>de</strong> otimizar as investigações morfo-fisiológicas relacionadas à senescência e influência<strong>de</strong> hormônios sexuais na aterosclerose.MÉTODOS: Foram utilizados camundongos C57 e ApoE <strong>de</strong> 18 meses <strong>de</strong> ida<strong>de</strong>, alocados em 4 grupos: C57fêmeas (n = 2), C57 machos (n = 4), ApoE fêmeas (n = 3) e ApoE machos (n = 4). Após anestesia, seguida<strong>de</strong> cateterização da artéria carótida direita, injetou-se o contraste (200 µL <strong>de</strong> iodo a 35%) <strong>para</strong> a angiografiapor meio do sistema <strong>de</strong> aquisição <strong>de</strong> imagens por raios X (Shimadzu ® ). Cada animal foi submetido a dois tipos<strong>de</strong> imagens, sob angulações <strong>de</strong> 90° e 45°, previamente padronizados. As imagens obtidas foram analisadaspelo programa do QCA (Quantitative Coronary Analysis). Os dados estão expressos como média ± EPM e<strong>para</strong> análise estatística, foram realizados ANOVA <strong>de</strong> 1 e 2 vias, seguidas pelo post hoc <strong>de</strong> Fisher (*p < 0,05).RESULTADOS: Observou-se um maior grau <strong>de</strong> insuficiência aórtica em camundongos machos quandocom<strong>para</strong>dos às fêmeas tanto <strong>para</strong> os animais C57 quanto <strong>para</strong> os animais ApoE (tabela abaixo). Entretanto,a técnica da angiografia quando adaptada ao camundongo não <strong>de</strong>tectou diferença significativa entre os graus<strong>de</strong> estenose, diâmetro médio interno e velocida<strong>de</strong>s <strong>de</strong> fluxo sanguíneo da artéria aorta nos animais idososC57 e ApoE in<strong>de</strong>pen<strong>de</strong>nte do sexo.Insuficiência AórticaGrupo Grau 0 Grau 1 Grau 2 Grau 3 Grau 4C57 machos + +++ApoE machos ++ ++C57 fêmeas + +ApoE fêmeas ++ +CONCLUSÕES: A angiografia realizada sugere uma influência cardioprotetora dos hormônios sexuaisfemininos em animais idosos, tanto controles quanto aterocleróticos, com relação a presença e severida<strong>de</strong> dainsuficiência da válvula aórtica. Além disto, similiar ao que ocorre em seres humanos, não foram <strong>de</strong>tectadasoutras alterações hemodinâmicas na artéria aorta dos grupos estudados.APOIO FINANCEIRO: CNPq, Capes, FACITEC055 EPIDEMIOLOGIA E FISIOPATOLOGIA 056PREVALÊNCIA DE HIPERTENSÃO ARTERIAL SISTÊMICA EM ESTUDANTESDE MEDICINANara Alves Buriti, Mellysan<strong>de</strong> Pontes Faccin, Ary Serpa Neto, José Luís Aziz,Thiago Corsi Filiponi, Leonardo Bernal, Henrique PalombaFaculda<strong>de</strong> <strong>de</strong> Medicina do ABC, Santo André, SPFUNDAMENTO: O aumento da expectativa <strong>de</strong> vida e dos fatores <strong>de</strong> risco ligados à aterosclerosevem tornando obrigatórias tanto a adoção <strong>de</strong> medidas preventivas <strong>para</strong> doenças cardiovasculares(DVC) como sua investigação precoce.OBJETIVO: Determinar a prevalência <strong>de</strong> hipertensão arterial sistêmica (HAS) em uma amostra<strong>de</strong> acadêmicos ingressantes no curso médico, e se há correlação da pressão arterial (PA) medidacom os fatores <strong>de</strong> risco cardiovascular nesta população.PACIENTE E MÉTODOS: A PA <strong>de</strong> 106 estudantes do primeiro ano do curso médico foi medida,em uma única ocasião, por três vezes, durante uma aula <strong>de</strong> aprendizado <strong>de</strong> sinais vitais. Foramanalisadas as seguintes variáveis: sexo, ida<strong>de</strong>, raça e índices antropométricos (peso, estatura,índice <strong>de</strong> massa corporal, circunferência abdominal e a do braço). Antece<strong>de</strong>ntes familiares <strong>para</strong>HAS (<strong>de</strong> primeiro grau), ativida<strong>de</strong> física prévia ao ingresso na graduação, tabagismo e uso <strong>de</strong>anticoncepcional foram obtidos com a aplicação <strong>de</strong> questionário. As medidas <strong>de</strong> PA foram classificadassegundo as V Diretrizes <strong>Brasileira</strong>s <strong>de</strong> Hipertensão Arterial Sistêmica.RESULTADOS: O total da amostra foi <strong>de</strong> 84 alunos (25 homens e 59 mulheres). A média <strong>de</strong> ida<strong>de</strong>foi <strong>de</strong> 20,27 ± 1,91, composta por 90,5% <strong>de</strong> caucasianos e 9,5% <strong>de</strong> orientais. Foi encontrada umaprevalência <strong>de</strong> HAS <strong>de</strong> 2,4%, PA limítrofe <strong>de</strong> 3,6%, normal <strong>de</strong> 26,2% e PA ótima <strong>de</strong> 67,9%. Nãofoi encontrada diferença estatisticamente significativa entre os sexos <strong>para</strong> medidas <strong>de</strong> pressãoarterial e índices antropométricos, à exceção da cintura abdominal, com média <strong>de</strong> 76,72 ± 8,67cm (homens 85,0 ± 8,97 vs 73,22 ± 5,69 p < 0,001). Foi encontrado 59,4% da população com pelomenos 1 fator <strong>de</strong> risco <strong>para</strong> DCV.CONCLUSÕES: Apesar da baixa prevalência <strong>de</strong> HAS nesta população, uma abordagem precoce<strong>para</strong> prevenção <strong>de</strong> fatores <strong>de</strong> risco cardiovascular se torna justificada.TRATAMENTOMULTIPLE-RISK INTERVENTION WITH SINGLE-PILL AMLODIPINE/ATORVASTATIN THERAPY HELPS PATIENTS WITH DIVERSE ETHNICITYATTAIN RECOMMENDED THERAPEUTIC GOALS FOR BLOOD PRESSUREAND LIPIDS (THE GEMINI-AALA STUDY)H Chaves 1 , HF Tse 2 , Y Ro 3 , L Howes 4 , C Aguilar-Salinas 5 , S Erdine 6 , R Guindy 7 , PChopra 8 , RA Moller 8 , IM Schou 9 , on behalf of the GEMINI-AALA Investigators1Fe<strong>de</strong>ral University of Pernambuco, Brazil; 2 University of Hong Kong, China; 3 Korea University,South Korea; 4 Griffith University, Australia; 5 INCMNSZ, Mexico; 6 Istanbul University, Turkey;7Ain Shams University Cairo, Egypt; 8 Pfizer Inc, New York; 9 Pfizer, AustraliaBACKGROUND: Hypertension (HTN) and dyslipi<strong>de</strong>mia (DYS) are highly prevalent and frequentlycoexist, increasing the risk of cardiovascular (CV) disease. Currently, attainment of therapeuticgoals for these conditions is low among patients worldwi<strong>de</strong>.OBJECTIVE: To evaluate the efficacy/safety of single-pill amlodipine besylate/atorvastatincalcium in treating patients of diverse ethnicity with concomitant hypertension (HTN) anddyslipi<strong>de</strong>mia (DYS).DESIGN AND METHOD: The GEMINI-AALA study was a 14-week, multicenter, open-label,titration-to-goal study in patients with HTN/DYS from 27 countries across 5 continents. In additionto lifestyle recommendations, 8 dosages of amlodipine besylate/atorvastatin calcium single-pill (5/10 – 10/80 mg) were administered and titrated to improve BP and LDL-C control. The primaryefficacy assessment was the percentage of patients attaining both BP and LDL-C goals accordingto JNC 7 and NCEP ATP III gui<strong>de</strong>lines (goals set according to patients’ risk factors: BP < 130 – 140/80 – 90 mmHg; LDL-C < 100 – 160 mg%).RESULTS: 1649 patients received study medication; 51.7% were of Asian ethnicity. A largeproportion of the study population (91.4%) had at least one risk factor in addition to HTN/DYS and61.7% had coronary heart disease (CHD) or a risk equivalent. At baseline, mean BP was 146.5/ 88.3 mmHg and LDL-C was 130.2 mg%. The mean daily dose of amlodipine/atorvastatin was 6.1/17.1 mg. After 14 weeks of treatment, 55.2% of patients reached both BP and LDL-C therapeuticgoals, 61.3% reached BP goals, and 87.1% reached LDL-C goals. Goal attainment was similaracross different racial groups. Mean BP and LDL-C reductions were 20.2/11.4 mmHg (13.5/12.5%), and 44.2 mg% (28.6%), respectively. Overall, mean Framingham 10-year risk of CHDwas reduced from 13.4% at baseline to 6.2% at last observation, a relative risk reduction of 49.6%.Treatment was safe and well tolerated. The most common treatment-emergent adverse eventswere peripheral e<strong>de</strong>ma (9.8%) and respiratory tract infection (5.0%).CONCLUSIONS: Amlodipine besylate/atorvastatin calcium single-pill therapy is an effectiveand safe intervention, which helps patients from diverse ethnic backgrounds with combined HTN/DYS to achieve therapeutic BP and LDL-C goals and reduce their overall CV risk.2502 - Resumos.pm6 252/8/2007, 15:39

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