Analysis on the clinical outcome of 951 cases of tachycardias who underwent radiofrequency catheter ablation

AIM: To analyze clinical outcome of tachycardias who underwent radiofrequency catheter ablation and provide guidelines for further clinical work. METHODS: Clinical outcomes of 1151 cases of tachycardias who had undergone radiofrequency catheter ablation were retrospectively analyzed.The patient population compromised 614 men and 537 women aged seven to seventy eight (40.1±13.4) years and the history of tachycardia was one month to forty (12.5±4.8) years. Normal methods were adopted to carry out electrophysiological test and radiofrequency catheter ablation. RESULTS: There were 691 cases of atrioventricular reentrant tachycardias (AVRT) with 704 accessory pathways, including 544 left accessory pathways(405 left free wall,78 left anterior and 61 left posterior accessory pathways),116 right accessory pathways,11 double accessory pathways,and 20 accessory pathways concomitant with dual atrioventricular nodes. There were 357 cases of atrioventricular nodal reentrant tachycardia (AVNRT), including 296 cases of anterogradely jumping conduction,16 cases of retrogradely jumping conduction,and 45 cases without jumping conduction. In addition, there were 50 cases of ventricular tachycardia (VT), 48 cases of atrial tachycardia (AT) and five cases of atrial flutter (AF). The overall success rate was 94.6 percent,in which radiofrequency catheter ablation of supraventricular tachycardias mediated by dual atrioventricular nodes and left sided accessory pathway had an high success rate(above 98.0 percent), whereas the success rate of atrial arrhythmias ablation was the lowest (62.0 percent in AT). The recurrence rate was 4.7 percent after radiofrequency catheter ablation. In ten cases, contemporary atrioventricular block took place during procedure, and two patients had complete atrioventricular block necessitating pacemaker implantation. Six patients had artery embolism, three patients had venous embolization, and two patients suffered sudden death from pulmonary embolism.CONCLUSION: Radiofrequency catheter ablation can be performed effectively and safely in different population,especially in patients with AVRT and AVNRT.