甲亢患者心率变异信号的现代谱分析法

Hyperthyroid Heart Rate Varialility Signal Using Modern Spectrum Analysis Method

采用自制的心电信号采集系统,将心电图机的模拟信号放大滤波后,送入计算机中的采集卡中,采样频率设为1 000Hz,连续采集5min的心电信号并保存于硬盘中。利用现代谱分析法和FFT分析法,分析了19例正常人和10例甲亢患者心率变异信号的VLF/HF值。可以看出,甲亢患者和正常人的VLF/HF值有明显的差异。对比现代谱分析法和FFT分析法,在正常人和甲亢患者VLF/HF比值对比研究中,现代谱分析法并无明显的不同和优势。研究结果表明,谱分析法是分析甲亢患者自主神经异常的有效手段。

Using studied ECG sampling system, the analog signals of electrocardiograph is magnified and filtered,sending into the sampling card in computer, the sampling frequence is 1 000 Hz, the 5 minutes sampling signal is saved to hard disk. Using modern spectrum analysis method and FFT, the specific value VLF/HF of Heart Rate Variability (HRV)of 19 healthy individuals and 10 hyperthyroid is analysed .It is found that the significant difference of the specific value VLF/HF between the healthy individuals and hyperthyroid.There are no especial advantage and distinctness by using the modern spectrum analysis method or FFT to study balance the specific value VLF/HF between the healthy individuals and hyperthyroid. The result shows that the spectrum analysis method is relly an effective measure to analyze independence nerve abnormalities of hyperthyroid.