Key result
A patient with complete AV block in early childhood demonstrated late onset of antegrade accessory pathway function at 7 years of age, providing evidence of developmental changes in accessory pathways.
Case Report (n=1)
This case demonstrates developmental changes in accessory pathways, showing late onset of antegrade conduction which may explain age-related differences in narrow complex tachycardia onset.
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May indicate late antegrade accessory pathway function in congenital AV block; leaves open the extent of developmental changes in conduction tissue.
This case report discusses a patient with complete AV block in early childhood. The patient required a permanent pacemaker. At 6 years of age, intermittent preexcited beats were noted on telephonic transmissions. At 7 years of age, 1:1 preexcitation was noted in sinus rhythm. Therefore, late onset of antegrade accessory pathway function is demonstrated. This case provides evidence of developmental changes in accessory pathways. This may explain age related differences in the onset of narrow complex tachycardia in the school age years.
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Erickson et al. (2000) conducted a case report in Complete AV block (n=1). A patient with complete AV block in early childhood demonstrated late onset of antegrade accessory pathway function at 7 years of age, providing evidence of developmental changes in accessory pathways.
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