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正常人的心律是由窦房结的自动性节律所决定的。同时受到交感和副交感神经(迷走神经)等的影响。笔者等选择没有明显心脏疾病的室性期前收缩(VPC)的病例54人作为对象,通过心率和VPC的1天之内变化和运动负荷,采用Holter式心电图仪及踏车负荷试验来研究加龄对VPC的种种影响。就心率而言,成年组(40～50岁),老年组(60岁以上)比青年组白天清醒时较慢,而夜间睡眠后日间的心率随着年龄的增加而减少。心率的减少度与加龄之间在统计学上表现出有意义的逆相关(r=-0.442,P<0.01)。
Normal heart rate is determined by the automatic rhythm of the sinus node. At the same time by the sympathetic and parasympathetic (vagus nerve) and other effects. The author chose 54 cases of ventricular premature contractions (VPC) without obvious heart disease as the object, through the heart rate and VPC changes within 1 day and exercise load, the use of Holter-type electrocardiograph and treadmill load test to study plus Various effects on VPC. In terms of heart rate, the adult group (aged 40-50 years) and the elderly group (older than 60 years) were slower than the young group when awake during the day, while the nighttime nighttime heart rate decreased with increasing age. The decrease in heart rate correlated inversely with age statistically significant (r = -0.442, P <0.01).