Inducible atrioventricular nodal reentry tachycardia in infants with a history of neonatal orthodromic reciprocating tachycardia.
Atrioventricular nodal reentry tachycardia (AVNRT) is an uncommon mechanism of supraventricular tachycardia in neonates in whom orthodromic reciprocating tachycardia (ORT) predominates. We report three patients with structurally normal hearts who presented with neonatal ORT, documented by transesophageal electrophysiology studies at 2 to 3 weeks of age. At follow-up study at 8-12 months of age, no infant had inducible ORT, suggesting spontaneous regression of congenital accessory pathways; however, each had inducible tachycardia consistent with the typical form of AVNRT. The clinical significance of this finding is unknown and warrants further study.
Kannankeril
Prince J
PJ
Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA. Prince.Kannankeril@vanderbilt.edu
Johns
James A
JA
Fish
Frank A
FA
D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography / Q000379:methods; D006801:Humans; D007231:Infant, Newborn; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000151:congenital* / Q000188:drug therapy / Q000503:physiopathology
D000889:Anti-Arrhythmia Agents