text: <unk>  is extremely rare, progressive and usually fatal, if left untreated.
  Isolated stenosis of<unk> <unk> s, as they enter into the left atrium, is a rare congenital cardiac abnormality that has significant impact on clinical outcome.
  Diagnosis is difficult to suspect, especially in the absence of other cardiac abnormalities.
  Symptoms and clinical signs of<unk>  are very similar to those of chronic lung disease and are very difficult to differentiate.
option_0: Pulmonary vein stenosis
option_1: Pulmonary valve stenosis
option_2: Tricuspid stenosis
option_3: Aortic arch anomalies
option_4: Pulmonic regurgitation
option_5: Overriding aorta
option_6: Bicuspid aortic stenosis
option_7: Tricuspid prolapse