A patient may be asymptomatic or have any of the following features:
Dyspnea on Exertion
CHF
Palpitations
Syncope
Right heart failure
A. fib
Stroke (via an embolism)
Pulmonary hypertension, marker of late disease and increased mortality
Eisenmenger syndrome
Atrial septal defect
Cyanotic
Ventricular septal defect
Tetralogy of fallot
Tricuspid atresia
Total anomalous pulmonary venous return
Patent ductus arteriosus
Transposition of the great arteries