[Dual ventricular response - a rare and underdiagnosed condition?].

Dual ventricular response, also called dual atrioventricular [AV] nodal non-re-entrant tachycardia, is a rare arrhythmic condition, characterized by 1:2 anterograde conduction via dual AV-nodal pathways, that is, one P wave is followed by two QRS complexes. The main symptom is palpitations, and it can be treated by catheter ablation. To date, less than 100 cases of dual ventricular response have been published in the scientific literature. In this case report, we present two patients with dual ventricular response (based on ECG findings), both of whom were identified during a 10-year period at a small hospital in Sweden. The case report exemplifies the potential for underdiagnosis of dual ventricular response, due to its tendency to mimic more common arrhythmic conditions, like supraventricular tachycardia and atrial fibrillation.