Later at 6,9,12 months with HOLTER examination.Results Clinical symptoms improved and no pacemaker syndrome occured after the follow-up of sixty-two paients.

• 结论单腔双感知和单腔单感知频率应答起搏器对比，当活动量或通气量增加时，起搏频率随之增加，其临床效果无明显差异。