title: Diagnostic conclusions from the EASI-derived 12-lead electrocardiogram as compared with the standard 12-lead electrocardiogram in children.
abstract: BACKGROUND
  Fewer electrodes on more easily located places would facilitate electrocardiogram (ECG) recording. To investigate the possibility of simplifying ECG recording in children, we compared the diagnostic conclusions when interpreting standard versus EASI-derived 12-lead ECGs. Our hypothesis was that the variation of the interpretation of standard versus EASI-derived 12-lead ECGs was not greater than the intrareader variation of the interpretation of standard ECGs.
  
  
  METHODS
  The study included 221 children. The 2 lead systems were recorded simultaneously. Two experienced pediatric cardiologists interpreted the ECGs. First, the reader interpreted a set of 221 ECGs with randomly allocated standard and EASI-derived 12-lead ECGs. Next, the reader interpreted the complementary ECG set without having access to the first set. Finally, the reader reinterpreted the standard ECGs from 98 children.
  
  
  RESULTS
  The variation of the interpretation of standard versus EASI-derived 12-lead ECGs was only slightly larger than the intrareader variation of the interpretation of standard ECGs.
  
  
  CONCLUSIONS
  For most of the electrocardiographic diagnoses, the conclusions from EASI-derived 12-lead ECGs were similar to those from standard ECGs. These findings support the suggestion that the EASI lead system is a potential alternative to the standard ECG in children.
authors.affiliation: Department of Clinical Physiology, Lund University Hospital, Lund, Sweden. annika.welinder@med.lu.se
authors.forename: Annika
authors.initials: A
authors.lastname: Welinder
authors.forename: Dirk Q
authors.initials: DQ
authors.lastname: Feild
authors.forename: Jerome
authors.initials: J
authors.lastname: Liebman
authors.forename: Charles
authors.initials: C
authors.lastname: Maynard
authors.forename: Galen S
authors.initials: GS
authors.lastname: Wagner
authors.forename: Göran
authors.initials: G
authors.lastname: Wettrell
authors.forename: Olle
authors.initials: O
authors.lastname: Pahlm
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography / Q000379:methods*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D015588:Observer Variation; D010372:Pediatrics / Q000379:methods*