echocardiography: congenital defect shunt flow left ventricle to right atrium right to left
echocardiography: congenital defect shunt flow left ventricle to right atrium right to left
echocardiography: congenital defect shunt flow left ventricle to right atrium right to left (procedure)
echocardiography: congenital defect shunt flow left ventricle to right atrium right to left (procedure)