• Meiwei Zhang, Yeling Wang, Dongmei Chen, Hang Li, and Zhiguo Zhang.
• Department of Cardiology, the First Hospital of Jilin University, Changchun, Jilin Province, China.
• Medicine (Baltimore). 2018 Jun 1; 97 (23): e10938.

RationaleDual atrioventricular nodal non-reentrant tachycardia (DAVNNT) is an uncommon arrhythmia. Because of the different refractory periods of fast and slow pathways, a single atrial depolarization gives rise to 2 ventricular activationsthrough fast and slow pathways separately.Patient ConcernsA 45-year-old woman was referred to our Cardiology Center with symptoms of recurrent palpitations and fatigue persisting for the previous 3 years. On echocardiography, the ejection fraction of the left ventricle was 45%.DiagnosesElectrophysiological study findings and 12-lead electrocardiogram led to a diagnosis of DAVNNT.InterventionsOur case responded very well to the ablation of the slow pathway, and her tachycardia completely disappeared.OutcomeHer left ventricle ejection fraction also improved to52% after 3 months of follow-up. The patient remained asymptomatic throughout the follow-up period of 1 year, without any recurrence or complications.LessonsDAVNNT is a rare arrhythmia which can induce tachycardia-induced cardiomyopathy. Ablation of the slow pathway isconsidered a curative treatment.

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