Describe about Aorto Pulmonary Window ?

This uncommon malformation consists of communication usually non-restrictive between the adjacent walls of the ascending aorta and pulmonary trunk. The Pathophysiology of AP window is similar to that of a large PDA. In 80 per cent of the patients The murmur is systolic rather than continuous and is punctuated by eddy sounds. A moderately restrictive AP window generates a continuous murmur. Apical mid diastolic murmur represents increased flow across the mitral valve.