Artigo

Realce tardio miocárdico por ressonância magnética cardíaca pode identificar risco para taquicardia ventricular na cardiopatia chagásica crônica

PAULO ROBERTO SCHVARTZMAN, Ronaldo Peixoto Mello, Gilberto Szarf, Denis Szejnfeld, Verônica Fernandes, João A. C. Lima, Claudio Cirenza, Angelo A.V. De Paula, Edson Minoru Nakanu, mariano Martinez Espinoza

ARQUIVOS BRASILEIROS DE CARDIOLOGIA, v. 98, n. 5, p. 421-430, 2012.

Motivo: Produção Corpo Clínico

Setor HMV: Serviço de Radiologia

Área da saúde: Radioterapia

Resumo: Background: Invasive and non-invasive tests have been used to identify the risk of ventricular tachycardia (VT) in patients with chagas’ cardiomyopathy (CCM). Cardiac magnetic resonance imaging (CMRI) using the delayed enhancement (DE) technique can be useful to select patients with global or segmentary ventricular dysfunction, with high degree of fibrosis and at higher risk for clinical VT. Objective: To improve the identification of predictors of VT in patients with CCM. Methods: This study assessed 41 patients with CCM [30 (72%) males; mean age, 55.1 ± 11.9 years]. Twenty-six patients had history of VT (VT group), and 15 had no VT (NVT group). All patients enrolled had DE and segmentary ventricular dysfunction. In each case, the following variables were determined: left ventricular volume; percentage of ventricular wall thickness impairment in each segment; and DE distribution. Results: No statistical difference regarding the DE volume between both groups was observed: VT group = 30.0 ± 16.2%; NVT group = 21.7 ± 15.7%; p = 0.118. The probability of VT was greater in the presence of two or more contiguous transmural fibrosis areas, and that was a predictiveb factor of clinical VT (RR 4.1; p = 0,04). Agreement between observers was 100% regarding that criterion (p < 0.001). Conclusion: The identification of two or more segments of transmural DE by use of CMRI is associated with the occurrence of clinical VT in patients with CCM. Thus, CMRI improved risk stratification in the population studied. (Arq Bras Cardiol 2012;98(5):421-430) Keywords: Tachycardia ventricular; chagas’ cardiomyopathy; cardiac magnetic resonance imaging.

Envie um e-mail para os autores

© Copyright 2010 Hospital Moinhos de Vento - Todos os Direitos Reservados

Hospital Moinhos de Vento - Rua Ramiro Barcelos 910 - Bairro Moinhos de Vento - Porto Alegre - RS , CEP: 90035-001 - Fone: (51) 3314 - 3434

Hospital Moinhos de Vento Iguatemi - Shopping Iguatemi 3º andar - Porto Alegre - RS, CEP: 91340-001 - Fone: (51) 3327 - 7000

Responsável Técnico - Dr. Luiz Antonio Nasi - CREMERS 11217

Fale Conosco | Ouvidoria | Trabalhe Conosco | Localize e Visite | Mapa do Site