Successful percutaneous cryoablation of recurrent atrioventricular nodal re-entrant tachycardia after radiofrequency ablation

A 21-year-old male patient underwent radiofrequency catheter ablation for refractory attacks of supraventricular tachycardia. One month after the procedure, he developed recurrent atrioventricular nodal re-entrant tachycardia, for which percutaneous cryoablation was performed. Programmed atrial stimulation at the end of cryoablation did not induce an atrio-His (AH) jump or tachycardia. During a four-month follow-up without any medications, the patient was free of any signs of tachycardia.

Keywords: Atrioventricular node/surgery, catheter ablation, cryosurgery/instrumentation, electrophysiology; heart conduction system; tachycardia/surgery