Respiration affects on P wave alignment and averaging

M. Saki, Y. Z. Ider, B. Ozin, A. Oto
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引用次数: 1

Abstract

Root-mean-square values of the residual signals between a P wave template and individual P waves were computed and a tachogram was made. Using Autoregressive (AR) modelling, a major spectral peak was observed at 0.2 Hz for both this tachogram and the respiratory volume signal. A similiar spectrum was obtained from the RMS tachogram of the isoelectric signal segments prior to the P waves. When the lead signals were filtered (6–12.5 Hz), the energy in the RMS tachogram of the isoelectric region almost vanished. On the other hand, volume gated signal averaging of the P waves led to two distinct averages corresponding to high and low respiratory volume. The difference was in the form of up to 10% amplitude scaling.
呼吸作用对P波排列和平均有影响
计算P波模板与各P波之间残差信号的均方根值,并绘制速度图。使用自回归(AR)模型,在0.2 Hz处观察到该速度图和呼吸量信号的主要谱峰。从P波前等电信号段的均方根速度图中获得了类似的频谱。对引线信号进行滤波(6 ~ 12.5 Hz)后,等电区RMS速度图中的能量几乎消失。另一方面,对P波进行体积门控信号平均,得到高、低呼吸量对应的两个明显的平均值。差异的形式是高达10%的幅度缩放。
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