Hear Rate Variability

[sirenix101]

Hello 

We have a recording of an ECG sample and have managed to estimate the heart rate from it. However, what we want to obtain is the heart rate variability from this recording, as in what is the heart rate from each individual QRS complex. This would mean that that the heart rate would change with each R peak. We are unsure of how to do this because actually what we have is the mean of the heart rate instead of the individual heart rates. If anyone could provide help it would be much appreciated. 

[altenbach]

Is this an algorithm question or a programming question? Should be easy to measure all p-p distances and do some statistics on it.

Maybe if you would attach your VI and some typical data we could give more specific advice.