Restoration of cardiac function by setting the ventricular pacing at a lower range in an infant with congenital complete atrioventricular block and dilated cardiomyopathy

Chun An Chen, Chung I. Chang, Jou Kou Wang, Ming Tai Lin, Shuenn Nan Chiu, Hsin Hui Chiu, Mei Hwan Wu

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9 Citations (Scopus)


Patients paced for congenital complete atrioventricular block are at risk of dilated cardiomyopathy. We report such an infant in whom the dilated cardiomyopathy resolved after adjusting the ventricular pacing range. The infant received an epicardial pacemaker soon after birth for the congenital complete atrioventricular block. He developed dilated cardiomyopathy 5 months after right ventricular pacing at 140 bpm, which is the mean physiological heart rate of the newborn and young infant. The cardiac function recovered gradually (left ventricular ejection fraction from 20% to 74%) after lowering the ventricular pacing rate to a range from 90 to 120 bpm. We suggest that pacing at heart rates that are within the mean physiological range may still be detrimental in young infants. Adjusting the pacing range may, at least in part, help to restore the ventricular function.

Original languageEnglish
JournalInternational Journal of Cardiology
Issue number1
Publication statusPublished - Dec 17 2008
Externally publishedYes



  • Children
  • Congenital complete atrioventricular block
  • Dilated cardiomyopathy
  • Heart rate
  • Right ventricular pacing

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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