Avaliação ecocardiográfica prospectiva de pacientes submetidos ao fechamento percutâneo de canal arterial / Prospective echocardiographic evaluation of patients after percutaneous closure of patent arterial duct

RESUMO

Foram estudados evolutivamente pelo ecocardiograma com Doppler 84 pacientes submetidos ao fechamento percutâneo do canal arterial com molas, visando à avaliação da efetividade do procedimento e possíveis complicações. Houve forte correlação entre as medidas do canal obtidas pela angiografia e pelo ecocardiograma. Ocorreu redução progressiva dos diâmetros das cavidades esquerdas e do fluxo residual. Observou-se alta prevalência de protrusão da mola para a luz da artéria pulmonar esquerda, porém só houve associação com perfusão pulmonar esquerda alterada à cintilografia quando o índice da diferença das velocidades obtidas entre as artérias pulmonares e o tronco pulmonar ao Doppler foi > 50 por cento.Eight-four patients submitted to percutaneous closure of the arterial duct with coils were studied prospectively by Doppler ecocardiography, to evaluate the results of the procedure and potential complications. There was a strong correlation between ductal dimensions obtained by echo and by angiography. A progressive reduction of the left cardiac cavities' diameters and of the rate of residual shunt was demonstrated. A high prevalence of coil protrusion inside the left pulmonary artery was observed. However, an association with decreased left lung perfusion by scintigraphy was only detected when the index of the difference of velocities obtained at the pulmonary arteries and trunk was > 50 per cent...