【摘要】 本文报道了老年及青年Ｗｉｓｔａｒ大鼠Ⅱ导联心电图ＱＲＳ波的时程、波幅及频谱特征，并分析了老龄对其时域值及频谱的影响．结果如下：（１）ｍ青年及老年鼠ＱＲＳ波时程及波幅；老年鼠与青年鼠相比，ＱＲＳ波时程延长（Ｐ＜０．０１）而波幅减少（Ｐ＜０．０５）；（２）青年及老年鼠ＱＲＳ波频谱特征：青年鼠ＱＲＳ波频谱图呈双峰型，可分为两型：大部分鼠（１３／２１只）第一峰大，少部分鼠（８／２１只）第二峰大。老年鼠频谱图与大部分青年鼠相似，也是双峰型，第一峰大，但与青年鼠相比，≥５０Ｈｚ、≥１００Ｈｚ、＞３００Ｈｚ频率成份功率显著减少（Ｐ＜０．０１或Ｐ＜０．０５）．频率能量分布向更低频率段转移，提示ＥＣＧ的ＱＲＳ波频谱分析对反映衰老有一定价值．更多还原

【Abstract】 In this paper, the amplitude, the duration and the frequency spectrum feature of ECG-oRS wave oflead I in young and aged wistar rats (n -21 and 11 respectively) were reported, and the effects of aged-relatedchanges on the time domain and frequency domain were analysed also. The results showed: (a) The duration ofoRS wave in aged rats is longer than that in young rats (P<0. of), and the amplitude of oRS wave in aged rats islower than that in young rats (PRO. 05) I (b) The oRS wave frequency spectrum in young rats has two peaks.which can be divided into two types I in most young rats the first peak is larger (13/21), but in few young rats thesecond peak is larger (8/21 ) 1 the aged rats have a similar type of oRS wave frequency spectrum which also hastwo peaks, and the first peak is larger, but the power of >50Hi,>100Hz, >300Hi decreased significantly (P<0. 01 or P<0. 05), and the power spectrum of oRS wave shifts to lower frequency in aged rats. These suggestthat the frequency spectrum of ECG-oRS wave can reflect senility to some extent.更多还原