Objective:To retrospectively analyze the effectiveness and safety of radiofrequency catheter ablation (RFCA) in elder patients with atrioventricular node reentrant tachycardia (AVNRT). Methods:From Jan 2005 to Jan 2008, 21 elder patients (9 males and 12 females) suffered from intermittent AVNRT and subjected to RFCA were enrolled in this study. The mean age was 68.2 ± 3.4 years (age range from 60 to 78 years). The major coincident disorders were hypertension, coronary heart disease and pulmonary emphysema. Results:First RFCA succeeded in 20 cases and failed in one case who refused second procedure (achievement ratio 95.2%). Post-operation follow-up for 9~36 months showed there was no relapse (relapse ratio 0%) or death. The side effects include mild pneumothorax in one patient with previous pulmonary emphysema and degree Ⅰ atrioventricular block (PR interval 0.28 s) during electric discharge in another patient (complication incidence 9.5%). Conclusion:RFCA is effective and safe for elder patients with AVNRT.