结论心房起搏频率的改变可影响房室结的有效不应期和传导功能。
Conclusion the atrial pacing rate of change can affect the AV node effective refractory period and conduction in refractory period.
它使用压电晶体将人体体动转换为电压，用此信号控制起搏频率的变化。
The model uses piezocrystal as a sensor to transfer the body mo-ving into electric signal and to control the rate.
目的探讨正常人的心脏变时能力与年龄、性别的关系，并为频率适应性起搏器的程控提供依据。
Objective To discuss the relationship between age, gender and heart chronotropic ability, and provide some data to the programming of rate adaptive pacemakers.
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