[2-dimensional contrast echocardiographic diagnosis of associated atrioventricular canal and cor triatriatum].

2D echocardiography provided the diagnosis of partial atrioventricular canal associated with cor triatriatum in a 4 year old child. The apical four chamber view showed an ostium primum and the presence of an abnormal transverse echo in the left atrium, dividing it into ventral and dorsal chambers. Contrast echocardiography in the four chamber apical view showed an atrial right to left shunt and only opacification of the ventral chamber of the left atrium at the mitral orifice. On the other hand, the dorsal chamber which received the pulmonary veins could not be opacified by contrast. The contrast injection allowed the diagnosis to be confirmed by demonstrating the division of the left atrium into two chambers.