Why the study?
Antidromic AVRT is rare and often misdiagnosed as VT, particularly when the accessory pathway conducts slower than the AV junction, obscuring surface ECG preexcitation.
Population
13-year-old male patient with antidromic AVRT misdiagnosed as VT
Design
Case report
Follow-up
Half a year
Key result
Catheter radiofrequency ablation successfully eliminated antidromic atrioventricular re-entrant tachycardia in a patient with a rare left-sided Mahaim accessory pathway, with no recurrence at 6 months.
Authors
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May prompt caution against VT misdiagnosis in pediatric wide-QRS tachycardia without preexcitation; leaves open need for prospective diagnostic studies.
Case Report (n=1)
No
Catheter radiofrequency ablation is an effective treatment for the rare presentation of a left atrioventricular accessory pathway with Mahaim fiber characteristics causing antidromic AVRT.
Jingjing et al. (2025) conducted a case report in Antidromic atrioventricular re-entrant tachycardia (AVRT) (n=1). Catheter radiofrequency ablation was evaluated on Termination of tachycardia and absence of recurrence. Catheter radiofrequency ablation successfully eliminated antidromic atrioventricular re-entrant tachycardia in a patient with a rare left-sided Mahaim accessory pathway, with no recurrence at 6 months.
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