Oh, I should add - there is a method from the group at Oulu (Finland) which is lnHF/RR that is designed to correct for vagal saturation at slower HRs. But there are still others, I'm sure.

The following article may have the answer to your question.

Circulation. 1996 Mar 1;93(5):1043-65.

Heart rate variability: standards of measurement, physiological interpretation and clinical use. Task Force of the European Society of Cardiology and the North American Society of Pacing and Electrophysiology.

Nope, looking for something well beyond the familiar measures here. Also more recent, I would imagine.

Hi,

I would recommend recent articles by Sacha, J., For example:

Sacha, J., Barabach, S., Statkiewicz-Barabach, G., Sacha, K., Muller, A., Piskorski, J., Barthel, P., and Schmidt, G. (2013). How to strengthen or weaken HRV dependence on heart rate-description of the method and its perspectives. Int J Cardiol. 168, 1660-1663.

Also: A comparison between heart rate and heart rate variability as indicators of cardiac health and fitness by C C Grant, C Murray, DC Janse van Rensburg, L Fletcher. Frontiers in Physiology 2013

Ahh, that's exactly what I was looking for.

For anyone else who finds this topic looking for methods, I also found these recent paper extremely comprehensive:

http://www.ncbi.nlm.nih.gov/pubmed/23674071

http://www.ncbi.nlm.nih.gov/pubmed/23681923

There is a new publication with numbers of reviews on Holter ECG, including HRV:

http://www.sciencedirect.com/science/journal/00330620/56/2

It's free of charge. download it.

C Karmakar and A Khandoker use tone- entropy whic hinvertingly corrects for HR as it looks a t predent change at a beat to beat basis. It is also good for recordings of different lengths.

There is also a publication by th esame authors where they discuss the HRV/RR ratio

Dear colleagues,

I apologize if I insert heer my suggestion that apparently has not a link with the posed question but I retain that it may be of interest .

I am not here to outline you the importance of the HRV current studies and I have not to remember you that the current linear or non linear methodologies are not completely satisfactory. Of course every day we find papers published also in valuable international journals that continue to use standard linear indexes and FFT or DFT for their clinical investigations and conclusions. Non linear methodologies have their valuable content also if currently they still do not find a continuous clinical appreciation. Usually three bands are considered in the frequency domain , as you well know, the VLF, the LF , and the HF for short 5-6 minutes recording. We need to remain in this framework, we need to use such bands for our estimations but my modest opinion is that the basic methodology as well as the physiological setting need to be advanced. This is the reason because we have studied for several years a new method, called the CZF method. We have verified, however, that such method, although of great interest, results of difficult interpretation for some clinicians. Consequently we have elaborated a new method, the new CZF version , that , in addition to the rigour of the previous formulation , gives results that give immediate clinical interpretation.

The method as well the software for your experimentation are given in our site www.saistmp.com Consequently I invite all you to visit the site and go to use such new method in your experimental as well as clinical conditions and verify directly its interest. The present software is the primary elaboration. Within a brief time we will give the complete version responding to all the formulation of the method. All the researchers that , at this time, will result using currently such new CZF method will receive obviously automatically the updates.

A final question. We have experienced the method on a large number of subjects and in some different pathological conditions. Consequently don’t hesitate to contact me if you need help, suggestions, questions, previous results that may help you in your use of the method.