Syncope in children and adolescents and the congenital long QT syndrome.
From a population-based epidemiologic cohort of children and adolescents who sought medical attention for syncope (n = 151), screening 12-lead electrocardiograms were obtained from 118 patients (79 female) to determine the frequency of significant QT prolongation. The distribution of heart rate corrected QT intervals (QTc) was compared with age- and sex-matched controls. Only one patient had QTc >470 ms.
Khositseth
Anant
A
Department of Pediatric and Adolescent Medicine/Division of Pediatric Cardiology, Mayo Clinic and Foundation, Rochester, MN 55905, USA.
Martinez
Matthew W
MW
Driscoll
David J
DJ
Ackerman
Michael J
MJ
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D015331:Cohort Studies; D004562:Electrocardiography; D016021:Epidemiologic Studies; D005260:Female; D006801:Humans; D008133:Long QT Syndrome / Q000150:complications* / Q000235:genetics / Q000503:physiopathology*; D008297:Male; D015203:Reproducibility of Results; D013575:Syncope / Q000209:etiology* / Q000235:genetics / Q000503:physiopathology*