How to filter the noise out from the ECG signal

Question

YanBo Liu 2022-5-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1716990-how-to-filter-the-noise-out-from-the-ecg-signal

回答： Ganesh 2023-7-18

The original ECG signal looks like this, the sampling frequency is 360Hz.

I try to design a FIR filter to filter the noise out so that i can get a clear view of PQRST complex of the heart beat. I plot this signal in the frequency domain and it looks like this:

So, how should I fiind the frequency where the noise locates?

4 个评论
显示 2更早的评论隐藏 2更早的评论

Jonas 2022-5-11

i suggest you play around using the signal analyzer app.

https://de.mathworks.com/help/signal/ug/using-signal-analyzer-app.html

tomorrow i will have a closer look!

Star Strider 2022-5-11

There is obvious 60 Hz line noise. Use a bandstop filter with a very narrow stopband to eliminate it.

Beyond that, it appears to represent normal sinus rhythm with left ventricular hypertophy with non-specific ST-T changes and one notable PVC. If this is a Lead II EKG, the origin of the PVC appears to be near the apex. There are Q-waves, however without a specific voltage calibration, it is difficult to interpret their significance.

请先登录，再进行评论。

请先登录，再回答此问题。