title: Orthogonal vectorcardiogram in cystic fibrosis. Diagnostic significance and correlation with pulmonary function tests; a four year follow-up.
mesh_terms: D000293:Adolescent; D006332:Cardiomegaly / Q000175:diagnosis*; D002648:Child; D003550:Cystic Fibrosis / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D011656:Pulmonary Emphysema / Q000175:diagnosis / Q000503:physiopathology*; D012129:Respiratory Function Tests; D013147:Spirometry; D014672:Vectorcardiography; D014797:Vital Capacity