PULMONARY ARTERY STENOSIS;  FOLLOW-UP STUDY.
D000790:Angiocardiography; D002648:Child; D003251:Constriction, Pathologic; D004562:Electrocardiography; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D011651:Pulmonary Artery; D011666:Pulmonary Valve Stenosis; D014672:Vectorcardiography
ANGIOCARDIOGRAPHY; CHILD; ELECTROCARDIOGRAPHY; INFANT; PULMONARY ARTERY; PULMONARY VALVE STENOSIS; VECTORCARDIOGRAPHY