Robertson, M The morphology of the right ventricular outflow tract after percutaneous pulmonary valvotomy: long term follow up. [electronic resource] - British heart journal Sep 1987 - 239-44 p. digital Publication Type: Journal Article ISSN: 0007-0769 Standard No.: 10.1136/hrt.58.3.239 doi Subjects--Topical Terms: AdolescentCatheterizationChildChild, PreschoolEchocardiographyFemaleFollow-Up StudiesHumansInfantMalePulmonary Valve--pathologyPulmonary Valve Stenosis--therapyVentricular Outflow Obstruction--pathology