<正> The atrial pacing lead is believed having higher stimulation thresholds and long-term complication rates than ventricular lead

this being one of the factors limiting the use of dual chamber pacing. A prospective study was undertaken to evaluate both atrial and ventricular bipolar lined steroid-eluting leads in long-term dual chamber pacing. There are 81 pairs of leads （Medtronic Capsure SP） used in 81 patients. Bipolar atrial and ventricular stimulation thresholds were measured immediately post implantation and 1

3

6

12

18 and 24 months. All leads demonstrated low mean stimulation thresholds during the follow-up and more than 94 % of leads could be paced chronically in the atrium and ventricle at 2.5 volts. In conclusion

atrial and ventricular steroid-eluting leads gave excellent stimulation thresholds allowing low energy long-term dual chamber pacing.