ECG

Hi,
I am looking fot material about ECG (Electrocardiogram)from the DPS (Digital Signal Processing) point of view.

thanks
yaaryAsked:
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havman56Commented:
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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havman56Commented:
DPS not getting ..
ru meaning DSP ( digital signal processing)

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pagladasuCommented:
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havman56Commented:
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 .
leads will be fixed.

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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havman56Commented:
yaary why no response
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yaaryAuthor Commented:
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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yaaryAuthor Commented:
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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jtm111Commented:
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


Then follow up with advanced reading on current directions and trends here:

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

There is your 1 year plan for study in a nutshell
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havman56Commented:
yarry

what happend? no response from u...

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yaaryAuthor Commented:
havman,
I'm expecting to get that book tomorrow. I hope it covers the subjects I need.
thanks.
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havman56Commented:
did u bought the book ?
it will describe detail about ECG ..
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yaaryAuthor Commented:
not yet.
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mirtolCommented:
This company produces EMG products and you can have a look at the manual to one of their products here

http://www.emslimited.co.uk/downloads/man79.pdf

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

Companies can be helpful.........
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havman56Commented:
yarry
what happedn no response...
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