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Previous issue date: 2013-02-22 / Introduction: Right ventricular pacing can be deleterious in patients with left ventricular dysfunction, but in patients with normal function the impact of this stimulation and triggering ventricular dyssynchrony clinically relevant is not fully established. Objectives: To evaluate clinical findings of patients with previously normal ventricular function, who underwent implantation of a pacemaker. Methods: We studied prospectively 20 patients (60% male and the average age was 58 years) underwent implantation of a pacemaker with the following inclusion criteria: normal ventricular function defined by echocardiography and the presence of ventricular pacing 90% higher (generator telemetry). We evaluated the following parameters: Class functional (New York Heart Association) 6-minute walk test, dosage of B-type natriuretic peptide (BNP), and conventional echocardiographic and evaluation dyssynchrony and intraventricular (by tissue Doppler, M-mode and pulsed Doppler) and the quality of life assessment by SF-36 Health Survey. The evaluation was done at 10 days (t1), 4 months (t2), 8 months (t3), 12 months (t4) and 24 months (t5). Data were compared over time according to ANOVA repeated measures (rmANOVA). Results: Of the following evaluated data showed no statistically significant variation (p> 0.05): conventional echocardiographic parameters, interventricular and intraventricular dyssynchrony. The six minute walk test, functional class and BNP worsened at the end of two years (p <0.05). Evaluation showed initial improvement in QOL domains: physical functioning, social and general health and worsens at the end of the two years. Conclusion: After 24 months the right ventricular pacing, in patients with normal function, correlated with worsening of ventricular function assessed clinically (class functional walk test and QOL) and measure laboratory (BNP). / Introdução: A estimulação de ventrículo direito pode ser deletéria em pacientes com disfunção ventricular, porém em pacientes com função normal o impacto desta estimulação como fator de dessincronia e desencadeamento de disfunção ventricular clinicamente relevante não é completamente estabelecido. Objetivos: Avaliar a evolução clínica e laboratorial de pacientes, com função ventricular previamente normal, submetidos a implante de marca-passo. Métodos: Durante dois anos foram estudados de forma prospectiva 20 pacientes (60% do sexo masculino) com idade média de 58 anos submetidos a implante de marca-passo com os seguintes critérios de inclusão: função ventricular esquerda normal definida pelo ecocardiograma e presença de estimulação ventricular superior a 90% (telemetria do gerador). Foram avaliados os seguintes parâmetros: classe funcional (New York Heart Association), teste de caminhada de 6 minutos(TC6’), dosagem do hormônio natriurético tipo B (BNP), avaliação ecocardiográfica convencional e com avaliação da dessincronia e intraventricular (através do Doppler tecidual, modo M e Doppler pulsado) e questionário de qualidade de vida (QV) (SF-36). A avaliação foi feita com 10dias (t1), 4 meses (t2), 8 meses (t3), 12 meses (t4) e 24 meses (t5). Os dados foram comparados ao longo do tempo segundo método ANOVA medidas repetidas (rmANOVA). Resultados: Dos dados avaliados os seguintes não apresentaram variação estatística significante (p>0,05): parâmetros ecocardiográficos convencionais, dessincronia intraventricular e interventricular. O TC6, a classe funcional e a dosagem de BNP apresentaram piora ao final dos dois anos (p<0,05). Avaliação de QV mostrou melhora inicial nos domínios: capacidade funcional, aspectos sociais e estado geral de saúde e piora destes parâmetros ao final dos dois anos Conclusão: Após 24 meses a estimulação ventricular direita, em pacientes com função normal, correlacionou com piora da função ventricular avaliada clinicamente (classe funcional, teste de caminhada e QV) e dosagem de BNP.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.bc.ufg.br:tde/3038 |
| Date | 22 February 2013 |
| Creators | Sá, Luiz Antônio Batista de |
| Contributors | Rassi, Salvador, Freitas Jr, Aguinaldo Figueiredo de, Brasil, Luiz Antônio, Medeiros, Paulo de Tarso Jorge, Souza, Weimar Kunz Sebba Barroso de, Rassi, Salvador |
| Publisher | Universidade Federal de Goiás, Programa de Pós-graduação em Ciências da Saúde (FM), UFG, Brasil, Faculdade de Medicina - FM (RG) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFG, instname:Universidade Federal de Goiás, instacron:UFG |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
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