<unk>  was first described by Elliotson as a defect which causes communication between proximal aorta and main pulmonary artery.There are different ways of classifying<unk> . proximal defects are the most common between proximal aorta and sinus of valsalva.<unk>  <unk> <unk>  is a rare condition with presence of a communication between the ascending aorta and pulmonary artery with two separate semilunar valves.The cause of<unk>  has not been identified<unk>  must be differentiated from other diseases or conditions that cause continuous heart murmur. Manifestation of the disease is not specific, but majority of patients have a large left to right shunt.If left untreated, large<unk>  may cause symptoms of pulmonary hypertension and congestive heart failure such as tachypnea, diaphoresis, failure to thrive and recurrent respiratory difficulties.The diagnosis of<unk>  is made by echocardigraphy after suspicion of large left to right shunt. Gold standard foe diagnosis of<unk>  is echocardiography. If echocardiography does not reveal enough information, a CT scan can be performed. Main treatment for AP<unk>  is surgery.
Aortopulmonary Window
Aortic arches
Aorticopulmonary septum
Base of the heart
Tracheoesophageal septum
Apex of the heart
Ventricular outflow tract
Aortic sinus