Different ECG types and interpreters v 12-lead ECGs interpreted by consultants for detection of atrial fibrillation*
ECG type (interpreter)Sensitivity % (95% CI)Specificity % (CI)+LR−LR
12-lead (SW)83 (78 to 88)99 (99 to 100)930.17
12-lead (GP)80 (71 to 87)92 (90 to 93)9.50.22
12-lead (N)77 (67 to 85)85 (83 to 87)5.20.27
12-lead (GP+SW)†92 (87 to 97)91 (90 to 93)100.09
Limb-lead (GP)83 (75 to 89)89 (87 to 90)7.20.20
Limb-lead (N)72 (64 to 80)83 (81 to 85)4.30.34
Chest-lead (GP)85 (79 to 91)86 (85 to 88)6.20.18
Chest-lead (N)69 (60 to 76)83 (81 to 85)4.00.38
  • *ECG  =  electrocardiogram; GP  =  general practitioner; N  =  nurse; SW  =  software; diagnostic terms defined in glossary. LRs calculated from data in article. For sensitivity, specificity, and LR calculations, “uncertain” classifications were counted as “not atrial fibrillation.”

  • †Either is positive.

  • *ECG  =  electrocardiogram; GP  =  general practitioner; N  =  nurse; SW  =  software; diagnostic terms defined in glossary. LRs calculated from data in article. For sensitivity, specificity, and LR calculations, “uncertain” classifications were counted as “not atrial fibrillation.”

  • †Either is positive.