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心率变异性（ｈｅａｒｔｒａｔｅｖａｒｉａｂｉｌｉｔｙ，ＨＲＶ）是指每心搏间的时间变异，即窦性心律不齐的程度。心率变异性作为对心脏自主神经活动状况的评估，越来越受到人们的重视，多种疾病可以影响心率变异性，本文旨在讨论老年慢性肾功能不全（氮质血症期）时的心率
Heart rate variability (HRV) is the time variation per heartbeat, the degree of sinus arrhythmia. Heart rate variability (HRV), as an assessment of cardiac autonomic nervous activity, is valued by more and more people. A variety of diseases can affect heart rate variability. This article aims to discuss the relationship between heart rate