MARCELO LUIZ CAMPOS VIEIRA
Projetos de Pesquisa
Unidades Organizacionais
Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina - Médico
4 resultados
Resultados de Busca
Agora exibindo 1 - 4 de 4
- Parâmetros Ecocardiográficos e Sobrevida na Cardiopatia Chagásica com Disfunção Sistólica Importante(2014) RASSI, Daniela do Carmo; VIEIRA, Marcelo Luiz Campos; ARRUDA, Ana Lúcia Martins; HOTTA, Viviane Tiemi; FURTADO, Rogério Gomes; RASSI, Danilo Teixeira; RASSI, SalvadorBackground: Echocardiography provides important information on the cardiac evaluation of patients with heart failure. The identification of echocardiographic parameters in severe Chagas heart disease would help implement treatment and assess prognosis. Objective: To correlate echocardiographic parameters with the endpoint cardiovascular mortality in patients with ejection fraction < 35%. Methods: Study with retrospective analysis of pre-specified echocardiographic parameters prospectively collected from 60 patients included in the Multicenter Randomized Trial of Cell Therapy in Patients with Heart Diseases (Estudo Multicêntrico Randomizado de Terapia Celular em Cardiopatias) - Chagas heart disease arm. The following parameters were collected: left ventricular systolic and diastolic diameters and volumes; ejection fraction; left atrial diameter; left atrial volume; indexed left atrial volume; systolic pulmonary artery pressure; integral of the aortic flow velocity; myocardial performance index; rate of increase of left ventricular pressure; isovolumic relaxation time; E, A, Em, Am and Sm wave velocities; E wave deceleration time; E/A and E/Em ratios; and mitral regurgitation. Results: In the mean 24.18-month follow-up, 27 patients died. The mean ejection fraction was 26.6 ± 5.34%. In the multivariate analysis, the parameters ejection fraction (HR = 1.114; p = 0.3704), indexed left atrial volume (HR = 1.033; p < 0.0001) and E/Em ratio (HR = 0.95; p = 0.1261) were excluded. The indexed left atrial volume was an independent predictor in relation to the endpoint, and values > 70.71 mL/m2 were associated with a significant increase in mortality (log rank p < 0.0001). Conclusion: The indexed left atrial volume was the only independent predictor of mortality in this population of Chagasic patients with severe systolic dysfunction.
- Estudo da Mecânica Cardíaca pelo Speckle Tracking(2014) ABDUCH, Maria Cristina Donadio; ALENCAR, Adriano Mesquita; MATHIAS JR., Wilson; VIEIRA, Marcelo Luiz de CamposNatural myocardial markers, or speckles, originated from constructive and destructive interference of ultrasound in the tissues may provide early diagnosis of myocardial changes and be used in the prediction of some cardiac events. Due to its relatively temporal stability, speckles can be tracked by dedicated software along the cardiac cycle, enabling the analysis of the systolic and diastolic function. They are identified by either conventional 2D grey scale and by 3D echo, conferring independence of the insonation angle, thus allowing assessment of cardiac mechanics in the three spatial planes: longitudinal, circumferential, and radial. The purposes of the present paper are: to discuss the role and the meaning of cardiac strain obtained by speckle tracking during the evaluation of cardiac physiology and to discuss clinical applications of this novel echocardiographic technology.
article Assessment of Natriuretic Peptides: The Heart Should Be Evaluated as a Whole Reply(2014) RODRIGUES, Ana Clara Tude; VIEIRA, Marcelo Luiz CamposconferenceObject CAN THE 3D ECHOCARDIOGRAPHIC MITRAL VALVE GEOMETRY ANALYSIS PREDICT THE SURGICAL VALVULOPLASTY RESULT IN PATIENTS WITH MITRAL VALVE PROLAPSE?(2014) PARDI, Mirian Magalhaes; ABDUCH, Maria; MATHIAS, Wilson; BRANDAO, Carlos; POMERANTZEFF, Pablo; VIEIRA, Marcelo