RESUMO
A case is presented of an unusual rupture of the ventricular septum due to a kick from a cow. The 7-year-old boy developed acute cardiac failure. The electrocardiogram showed anterior and apical myocardial infarction. Two-dimensional color and Doppler echocardiography revealed a rupture of the ventricular septum. The traumatic ventricular septal defect was successfully closed using a right atrial approach.
Assuntos
Traumatismos Cardíacos/etiologia , Ferimentos não Penetrantes/complicações , Animais , Bovinos , Criança , Eletrocardiografia , Traumatismos Cardíacos/diagnóstico , Traumatismos Cardíacos/cirurgia , Septos Cardíacos/diagnóstico por imagem , Septos Cardíacos/lesões , Septos Cardíacos/cirurgia , Humanos , Masculino , Ultrassonografia , Ruptura do Septo Ventricular/diagnóstico , Ruptura do Septo Ventricular/etiologia , Ruptura do Septo Ventricular/cirurgiaRESUMO
A multilayer neural networks training algorithm that minimizes the probability of classification error is proposed. The claim is made that such an algorithm possesses some clear advantages over the standard backpropagation (BP) algorithm. The convergence analysis of the proposed procedure is performed and convergence of the sequence of criterion realizations with probability of one is proven. An experimental comparison with the BP algorithm on three artificial pattern recognition problems is given.
