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Long QT syndrome presenting as fetal bradycardia and 2:1 atrioventricular block in a preterm infant
  1. Sean T Kelleher1,
  2. Terence Prendiville2,
  3. Aoife Carroll1
  1. 1 Department of Neonatology, University Hospital Waterford, Waterford, Waterford, Ireland
  2. 2 Department of Paediatric Cardiology, Children's Health Ireland at Crumlin, Crumlin, Dublin, Ireland
  1. Correspondence to Dr Aoife Carroll, Department of Neonatology, University Hospital Waterford, Waterford, Waterford, Ireland; aoifee.carroll{at}

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We present a case of a male infant born by emergency caesarean section for fetal bradycardia detected in the context of a maternal intercurrent illness at 31+5 weeks’ gestation. He was born vigorous despite a heart rate of 65–80 beats/min. ECG at birth (figure 1) demonstrates a ‘pseudo-block’ phenomenon arising from a profoundly prolonged QT interval (633 ms). Non-conducted P waves occur before the T wave of the preceding QRS as the ventricles have not repolarised before the atria contract for the second …

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  • Contributors AC and TP conceptualised the idea for the article. STK performed the literature search and drafted the manuscript. AC and TP critically revised the work and edited the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.