By using ECG sampling system, the analog signals of electrocardiograph were magnified , filtered and sent into the sampling card in computer. By using modern spectrum analysis method, the specific values :VLF/HF of Heart Rate Variability (HRV) of healthy
陈明杰.甲亢患者心率变异信号的频域分析[J].重庆工商大学学报(自然科学版),2004,(2): CHEN Ming-jie. Study of hyperthyroid heart rate variability signal using spectrum analysis method[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2004,(2):