text: <unk> <unk><unk>  is a<unk>  defect, present at birth<unk> , that results in low blood oxygen levels. There may be more than one defect.
option_0: Congenital heart disease cyanotic
option_1: Pulmonary hypertension risk factors
option_2: Patent foramen ovale post-surgical complications
option_3: Tracheitis risk factors
option_4: Pulmonary embolism risk factors
option_5: Pulmonary edema risk factors
option_6: Cardiomyopathy risk factors
option_7: Cyanosis in newborns