{Reference Type}: Case Reports
{Title}: An uncommon case of dual ventricular response in dual atrioventricular nodal non-reentrant tachycardia: A case report.
{Author}: Zhang M;Wang Y;Chen D;Li H;Zhang Z;
{Journal}: Medicine (Baltimore)
{Volume}: 97
{Issue}: 23
{Year}: Jun 2018
{Factor}: 1.817
{DOI}: 10.1097/MD.0000000000010938
{Abstract}: <B>BACKGROUND: </B>Dual 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.<BR><B>UNASSIGNED: </B>A 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%.<BR><B>UNASSIGNED: </B>Electrophysiological study findings and 12-lead electrocardiogram led to a diagnosis of DAVNNT.<BR><B>METHODS: </B>Our case responded very well to the ablation of the slow pathway, and her tachycardia completely disappeared.<BR><B>RESULTS: </B>Her 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.<BR><B>CONCLUSIONS: </B>DAVNNT is a rare arrhythmia which can induce tachycardia-induced cardiomyopathy. Ablation of the slow pathway isconsidered a curative treatment.