This podcast is part two of the two part series on acyanotic congenital heart lesions which describes the pathophysiology of obstructive acyanotic heart lesions including pulmonary stenosis, aortic stenosis, and coarctation of the aorta. This podcast was developed by Herman Bami, a second year medical student from Schulich School of Medicine and Dentistry at the University of Western Ontario and Dr. Michael Grattan, a pediatric cardiologist at the London Health Sciences Center.