Radiofrequency ablation of a left lateral accessory pathway caused inappropriate sinus tachycardia (110 bpm) in one patient, which was successfully treated with sinus node modification.
Case Report (n=1)
Radiofrequency ablation of a left lateral accessory pathway may cause inappropriate sinus tachycardia due to parasympathetic denervation, which can be successfully treated with sinus node modification.
A patient with palpitations and narrow QRS tachycardia was evaluated. In the EP study an atrioventricular reentrant tachycardia mediated by a left lateral accessory pathway was identified and catheter ablation was performed with success. A week later she returned with palpitations and pre-syncope. The resting ECG showed a sinus tachycardia with 110 bpm. After unsuccessful clinical treatment with beta-blockers, diltiazem and digoxin she underwent sinus node modification using radiofrequency catheter ablation with success. We postulated that RF application to ablate the lateral accessory pathway damaged the parasympathetic innervation in the left atrioventricular groove, causing inappropriate sinus tachycardia.
Moreira et al. (Tue,) conducted a case report in Inappropriate sinus tachycardia (n=1). Radiofrequency catheter ablation (sinus node modification) was evaluated. Radiofrequency ablation of a left lateral accessory pathway caused inappropriate sinus tachycardia (110 bpm) in one patient, which was successfully treated with sinus node modification.