ABSTRACT

Main mechanism of atrioventricular nodal reentrant tachycardia (AVNRT) results from the competition of two functional simultanously working pathways consisting of fast and slow ones in AV node and is one of the most prevalent form of supraventricular tachycardias seen in the clinic. Nowadays radiofrequency cathater ablation is generally preferred choice for treatment of the symptomatic patients. With the current interest in hereditary factors in cardiac arrhythmias and the serious developments in the field of molecular genetics, the genetic etiology of familial arrhythmias has come to the fore more recently. Beside the Familial Wolf-Parkinson-White syndrome which is a well known example of autosomal dominant inherited familial tachycardias, there is also familial atrial fibrillation that belongs to the channelopathies and proven to be inherited autosomally. On the other hand, there is no certain evidence that indicates AVNRT has such hereditary etiology so far. In this case, we report a family of mother, father and their daughter diagnosed of AVNRT in our clinic.