ECG: common artefacts and how to avoid them
ฝัง
- เผยแพร่เมื่อ 28 พ.ค. 2024
- Demonstration of the common artefacts such as 50Hz (or 60Hz), muscle noise (EMG) and cable movements. The plot you see is the original data as it was recorded by our bio-amplifier. In this way you can see what happens when Vasso changes the connections and that it takes quite a while until the amplifier recovers.
50Hz mains can be avoided by using fresh electrodes and short cables. Remember that 50Hz is eliminated by using the differential amplifier. However this works only if the 50Hz from all electrodes is identical requiring identical electrode contacts.
biosignals.berndporr.me.uk
Presenter: Vasso Georgiadou - วิทยาศาสตร์และเทคโนโลยี
Darling, you killing me. As anesthesiologist I found these experiences so thrilling...
Amazing video! Everything is so well explained and the sequence is so logical!
Thank you for explaining that there is a corrective action to remove distortion and that is by repositioning probes
Finally a sensible explanation of lead placement and management. Many thanks!
Awesome video! This was exactly what I was looking for!
Many Thanks !!!
Absolutely fantastic video with a lot of doubts cleared, thanks!!
Thanks for the postive feedback. :) /Bernd
I was looking for something like this for days now, thanks for this AWSOME video
nice demonstration! thanks!
Very useful and also very clear _ Thank you very much _ GOOD WORK 👍
This is awesome! Answers lots of questions that i had (why a notch filter is used at 50/60Hz for example)
Are you also studying some kind of electronic engineering mate?
teaching it .:)
Awesome, great explanation
Nice series. Nice and clear to understand ;-)
Fantastic information!
Beautiful you and your explanation
Thank you very much for the clear explanations!
thanks! :)
was extremely useful...very well explained....Thanks a lot!!
Really good stuff thank so much
Very helpfull......thnx for uploading...
thank you very much, nice explication :)
Bery clear thank you
Good information. Thanks.
Amazing video!
Awesome video! Very helpful for my exam
Explicit presentation. How do we avoid artefacts in wearable ECG?
This video is amazing, just wondering if INA126 can be replaced for AD620 or INA128/129?
Sure. There won't be any difference. They all do the same thing.
That was neat ! Thanks
Hi, it is an amazing demonstration. Can you please suggest how to resolve the electrode movement artifact other than the one you suggested in the video? I am thinking in the direction of filters and for that can you suggest the frequency range of electrode movement artifact
It's hard to remove as it overlaps with the ECG frequency. Better you prevent lose cables.
@@BPMbiosignals thank you for your quik response. Does electrode motion artifact have a specific frequency range or is it the same as for muscle motion artifact?
@@sheikhasher9191 Motion artefacts are the motions of your body. How fast do you move? Roughly 0.5Hz - 3Hz so right where the ECG spectrum is.
@@BPMbiosignals I am trying to get a clean ECG while walking and running. I have a clean ECG while being stable.
Thanks..
Nice
I love it
I just want to know why voltage is maximum when ventricle is Half depolarized & half repolraized 'peak of R wave & T waves ' or 'bottom of S wave'
Shouldn't it be fixed as long as there is a potential difference whether it is half or not??
is the 50-60 Hz noise is coming due to ac mains around us or it's due to some muscular movements?
sorry i did'nt get the 1:31 of your video..
I was wondering the same thing. Maybe it comes from ac outlet to which the diferential amplifier that she i wearing is conected.
The AC electrical wiring would create radio interference that would be picked up by the wires of the ecg
Where can be find the biopotential cables ?
I've added this info to the project web page under "Testing the bio amp: recording muscle activity (EMG)". There is also a link to the manufacturer's web page.
not quite sure why all of these issues couldn't be addressed by some lowpass filtering and percentile smoothing. Other than that, great video!
Because the frequency spectra overlap. If you do lowpass filtering (say below 10Hz to get rid of EMG) the heights of the R peaks will be drastically reduced and smeared out. Cable movements are pretty much around 1Hz so basically just there where the ECG fundamental frequency is. Not easy to remove either with a highpass and will only remove very slow cable movements below 1Hz but useless for running/jogging.
@@BPMbiosignals Thanks for the response! I need to try it. Would fast(er) sampling speed, smoothing, lowpass filtering, and percentile normalize work?!
@@userou-ig1ze No. Higher sampling rate has nothing to do with it. As I said above lowpass filtering doesn't work. Smoothing is also just lowpass filtering and doesn't work. Neither percentile normalisation. The best bet is recording a clean ECG in the first place and avoiding artefacts.
need to have caster oil before calculating by this kind of elektrodes
Nicely explained but um more obsessed with the girl... U r amazing 😍😍😍
Nice project baby 😚😽😽❤️
Our product is to implement this kind of detection function on clothes.
You're very pretty and such a great video
you look just like Mélanie Laurent
.
Drink some water miss.