Background: Aortopulmonary window is an uncommon congenital heart disease, with
untreated cases not surviving beyond childhood. However, very rarely it can present in adult patients
with features of pulmonary hypertension. Clinically these patients cannot be differentiated
from other more common conditions with left to right shunt. Transthoracic echocardiography if
performed meticulously, can depict the defect in aortopulmonary septum.
Results: We report a case of large unrepaired aortopulmonary window in a 23 years old patient, diagnosed
on transthoracic echocardiography.