stabile peak detector for ECG

[Imedex]

Hello,

I would like to ask you about help with my project. The goal is "detect peak in ECG signal" and get its position. All I need is possition for navigation and synchronization in other signal (invasive pressure).

What I alredy got:

1D array full of ECG values (about 18s interval; 26 beats)

I´ve alredy preanalized ECG (baseline vandering etc...) and you can see it in attachements (ecg.png)

My basic peak detector based on "threshold" works fine, but not for every ECG signal - it must be positive peak, no other similar peaks (T wave etc). 

So I really need to "prepare" the ecg better for peak detection. I´ve tried derivation (derivation.png), hilbert window (hilbert.png) but all of these "transformations" ale dependable on ECG amplitude, positivity/negativiy etc.

Could you please help me solve this?

Thank you very much

[Hatef.fouladi]

I always introduce biomedial toolkit fore people how work with ecg signal it is free to use

[Bob_Schor]

... or, to paraphrase Hatef, go here.

Bob Schor

[Hatef.fouladi]

Bob
I download it free two year ago it is not free now ?!

[Imedex]

I tried biomedical toolbox, but

a) its free, but you need advanced signal processing toolbox and its not free

b) ecg extraction.vi doesn´t work for me 😕 still got the same error message about sampling frequency...

[Hatef.fouladi]

honestly I do not test this code because i do not have ecg signal also i know it is not right way to do but I think it will be work for you

test it and tell me the result 

[Imedex]

Thank you for your VI, but I´m afraid I cant manage to make it.

I already got 2 while loops in my program and I do not know how to figure data transfer "array with ecg" to your while loop 😕

[Hatef.fouladi]

could you send me a one of your array data?
also you can insert it into your loop because it terminate automatically after find all pick
it happen less than second to do it
try it by attach one of your ecg signal and test it first

[Imedex]

Here is ecg channel 1 in lvm file. Is it ok for you?

I tried put the while structure into it, but the program remains stucked 😕

Thank you for your help

[Hatef.fouladi]

I try to make some code i think it work just try to develop it 

you could see repeatable pattern  in algorithm it show you can use it to find pick just develop it