Description: This module is Module 5b in a 13 Module Pediatric Echocardiography eCourse series. For information on the full Pediatric Echocardiography eCourse, please click here. In this module, Dr. Humes discusses somewhat less common, but important, congenital shunt lesions. Congenital shunt lesions covered include patent ductus arteriosus, aorto-pulmonary window, atrioventricular canal defects and total anomalous pulmonary venous return.