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# ECG

Posted on 2002-04-29
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Hi,
I am looking fot material about ECG (Electrocardiogram)from the DPS (Digital Signal Processing) point of view.

thanks
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Question by:yaary

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Expert Comment

DPS not getting ..
ru meaning DSP ( digital signal processing)

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yaary

The ECG works in the following principle.

there is a triangle called einothevn triangle. That is left arm and ur heart and your right ankle in leg .

let me explain in detail...

if ur heart beat at regual interval say x(t).
then frequency response will be x(w).

fourier tranform
x(w)= integration (x(t)* exp(-jw))dw

here x(f)=x(w) for convience.

but i feel some other noise will also be there
so u will not only have x{f} apart from this
x(f1),x(f2),....

so some filter will be there  will be of butter worth filter or chebychev filter.

this will eliminate other frequency component .
so bandpasss filter  equation will be

r(W)= { x(f) for j1< f <j2
0     for all

atlast u will get only heart beat in freauncy spectrum without any noise.

ECG had pqrs  waveform that is it is magnitute will be high at systole and less at diastole.

so ECG works on such principle.

if u ahve any doubts post it!

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yaary why no response
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Author Comment

thank you very much I need more details. do you know a textbook or a website that has more data and maybe some graphic examples?

thanks,
yaary.
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Author Comment

thank you very much I need more details. do you know a textbook or a website that has more data and maybe some graphic examples?

thanks,
yaary.
0

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Accepted Solution

havman56 earned 200 total points
yarray

i had a course on biomedical engineering .
The best book is written by cromwell .i had studied that book. superb book !!!

apart from that web site i dont know as of now i will let u know later .

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Expert Comment

If you want the basic idea, and if you have are java enabled, go here:

http://users.med.auth.gr/~ioanna/filters.html

Then you can find an online introductory text on signal processing here:

http://ee-www.stanford.edu/~gray/sp.html

http://citeseer.nj.nec.com/provaznik00wavelet.html

There is your 1 year plan for study in a nutshell
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yarry

what happend? no response from u...

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Author Comment

havman,
I'm expecting to get that book tomorrow. I hope it covers the subjects I need.
thanks.
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did u bought the book ?
it will describe detail about ECG ..
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Author Comment

not yet.
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Expert Comment

This company produces EMG products and you can have a look at the manual to one of their products here

Else give them a ring and ask for the information :o)

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yarry
what happedn no response...
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