time duration of R segment in an ECG with wavelt trasform

[m_eh_62]

I'm working on an ECG signal and I want to extract the R segment of the ECG signal
I use wavelet transform to extratc this segment (R-segment) and now I confront to a problem
more accurate I want to find the time of existence the R-segment in below plot(the last section of this plot)

the main signal (orginal signal)is attain in 20 second and it has 7200 member
I know the sample frequency is 360Hz for this signal and the R detected signal has 1818 member .
I want to find the time duration of R detected signal
I must not to divide the 1818/360 for attaining this time becuase there are some methods in Wavelet known as subsampling and downsampling that change the sample frequency for each level of decomposition or reconstruction.
I guess if i know the sampling frequency for R edtected signal (the sample frequency for this signal is different form the sample frequency of main signal (360Hz)) then I can calculate the time duration of this signal by :
1818/(sample frequency of R etect signal).
How can I calculate this samle feruency exactly?
i attch my m file to explain the subject more accurate.
Can anyone help me?
thanks

 

[m_eh_62]

Re: time duration of R segment in an ECG with wavelt trasfor

There isn't anyone famillar to Wavelet Transform?
Really?