目的比较主动固定电极（螺旋电极）与被动固定电极术后各参数的变化。
Objective To compare the regularity changes of parameters of active fixation and inactive fixation pacing leads after operation.
目的比较主动固定电极（螺旋电极）与被动固定电极术后各参数的变化。
Objective To compare the regularity changes of parameters of active fixation and inactive fixation pacing leads after operation.
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