Pediatric Cardiology

, Volume 37, Issue 3, pp 491–496 | Cite as

Arrhythmia Detection in Pediatric Patients: ECG Quality and Diagnostic Yield of a Patient-Triggered Einthoven Lead-I Event Recorder (Zenicor EKG-2™)

  • Lea UsadelEmail author
  • Guido Haverkämper
  • Susanne Herrmann
  • Rebekka Löber
  • Katja Weiss
  • Bernd Opgen-Rhein
  • Felix Berger
  • Joachim C. Will
Original Article


Symptoms that may be caused by arrhythmia are common in pediatric outpatient departments, though it remains challenging to reveal paroxysmal tachycardia. This investigation evaluated prospectively the quality and diagnostic yield of a newly available handheld patient-activated event recorder (ER) in children. In 226 children (pts) aged 0–17 years with or without congenital heart defects, pacemaker/ICDs or arrhythmia, a lead-I ER ECG was created. ER ECGs were recorded by pressing the patients’ thumbs on the device and were analyzed in comparison with a lead-12 ECG, as gold standard. Event recording and data transmission were possible in all cases. ECG quality of the ER showed a high accordance in measuring heart rate (ICC = 0.962), duration of QRS complexes (κ = 0.686), and PR interval (ICC = 0.750) (p < 0.001) although P wave detection remained challenging (p = 0.120). 36 % (n = 82) of the pts had heart rhythm disturbances. The ER yielded 92 % sensitivity in diagnosing supraventricular tachycardia plus 77 % sensitivity and 92 % specificity in identifying abnormal ECGs. In children, the application of the tested ER was suitable. ECGs of good quality could be performed and transmitted easily, and also complex arrhythmia analysis was possible. This ER is an excellent diagnostic device for the detection and exclusion of tachycardia in children.


Tachycardia Arrhythmia ECG Event recording Noninvasive monitoring 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Lea Usadel
    • 1
    Email author
  • Guido Haverkämper
    • 1
  • Susanne Herrmann
    • 1
  • Rebekka Löber
    • 1
  • Katja Weiss
    • 1
  • Bernd Opgen-Rhein
    • 1
  • Felix Berger
    • 1
  • Joachim C. Will
    • 1
  1. 1.Pediatric CardiologyCharité University Hospital BerlinBerlinGermany

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