The measurement of cost of HRV mainly consists of five items to count the cost of obtainment, development, employment, maintenance and reassignment of HR.
成本法所核算的项目主要有五项：取得成本、开发成本、使用成本、保障成本和离职成本。
Conclusions HR and HRV were useful indicators and could be used in cervical stimulation to evaluate the effect on autonomic nervous system.
结论心率和心率变异性是一项评定颈部手法刺激对自主神经系统效应的有用指标。
Objective To study the effects of nitric oxide(NO) in cardioinhibtory sites within the nucleus ambiguous(NA) on heart rate(HR) and heart rate variability(HRV) in anaesthetized rats.
目的研究大鼠疑核（NA）心抑制区的一氧化氮（NO）对心率（HR）和心率变异性（HRV）的影响。
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