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本文用等长数据分析法对３４例１９－３０岁健康人的心电信号进行ＦＦＴ分析，以自身整个心动周期信号总功率的千分之一水平为标准（自适应的）确定了整个心动周期心电信号各频段功率（绝对和相对）的分布，报告了整个心动周期信号带宽为０－５８±１９Ｈｚ，Ｐ波带度为０－８±３Ｈｚ，ＱＲＳ波带宽为０－５５±１９Ｈｚ，Ｔ波带宽为０－１１±２Ｈｚ．研究表明心电信号的能量主要集中在低频段，随着频率增高相应的能量逐渐降低．心电信号存在高频成分，甚至是５００Ｈｚ以上的成分．
This paper uses equal-length data analysis of 34 cases of healthy people aged 19-30 ECG analysis of the ECG to its own whole cardiac cycle signal power of one thousandth of the level as a standard (adaptive) to determine the entire cardiac cycle ECG power of each band (absolute and relative) of the distribution, reported the entire cardiac cycle signal bandwidth of 0-58 ± 19Hz, P band with 0-8 ± 3Hz, QRS bandwidth of 0-55 ± 19Hz, T Wave bandwidth is 0-11 ± 2Hz. Studies have shown that the energy of ECG signals mainly concentrated in the low frequency band, and the corresponding energy gradually decreases as the frequency increases. ECG signals exist high-frequency components, and even more than 500Hz components.