Atrioventricular Nodal Reentrant Tachycardia and Atrial Flutter Combined Exist Simultaneously in a 1-month-old Infant

Introduction: Transesophageal cardiac electrophysiological study can identify the type of supraventricular tachycardia and may find some special electrophysiological phenomena. Case presentation: This paper reported a 1-month-old infant who underwent transesophageal cardiac electrophysiological study and was induced atrioventricular nodal reentrant tachycardia and atrial flutter. The type of narrow QRS tachycardia in the infant was defined, which showed great value for the selection of medications to terminate tachycardia in the near future and the long-term radiofrequency ablation therapy. Conclusion: Transesophageal cardiac electrophysiological study is viable，safe and non-invasive, additionally can help to find some important ECG phenomena. It is especially suitable for infants who are temporarily inaccessible to receive radiofrequency ablation.