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Errors due to sampling frequency of the electrocardiogram in spectral analysis of heart rate signals with low variability

机译:由于低可变性的心率信号光谱分析中的心电图采样频率导致的误差

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Spectral analysis of the heart rate signal was studied in patients with low heart rate variability regarding an error that may occur when there is a specific relation between the averaged heart rate and the sampling frequency of the electrocardiogram. ECG waveforms were recorded from healthy subjects and from patients after heart transplant, digitized with different sampling rates and analyzed for spectral analysis of heart rate variability. It was found that in healthy subjects with high heart rate variability, accurate results can be obtained when the sampling rate of the ECG is greater than 125 Hz. In heart transplant patients, up to 100% error may occur when the sampling rate is below 1 kHz. It is concluded that for spectral analysis of the heart rate signal recorded from patients that are characterized with low heart rate variability, high sampling rate of the ECG signal is necessary (1 kHz).
机译:在心率变化的患者中研究了心率信号的光谱分析,当时平均心率与心电图的采样频率之间存在特定关系时可能发生的误差。 ECG波形被从健康受试者和心脏移植后的患者记录,以不同的采样率数字化并分析了心率变异性的光谱分析。发现,在具有高心率变异性的健康受试者中,当ECG的采样率大于125Hz时,可以获得准确的结果。在心脏移植患者中,当采样率低于1 kHz时,可能会出现高达100%的错误。结论是,对于从心率变异性低表征的患者记录的心率信号的光谱分析,ECG信号的高采样率是必要的(1 kHz)。

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