Calculating Heart Rate and Heart Rate Variability from Siemen Tic Physio Files

[EmilyBelleau]

Hello,

I ultimately just want to be able to calculate mean HR and heart rate variability so that I can compare differences between groups.

I have created a matlab script using PhysIO, but it does not seem to be computing or saving heart rate or heart rate variability. I have Siemen's Tic log files as input.

I am attaching my script along with the physio files for 1 participant including an INFO file, a PULS file, and a RESP file.

I would appreciate any guidance on this!

Thanks!

Emily
physio1_script.txt
Info.log
PULS.log
RESP.log

[mrikasper]

Dear Emily,

Thank you for using the PhysIO Toolbox. In order to see the heart rate outputs, you would have to specify HRV as a model to include in your script as follows:

%% HRV (Model): Heart Rate variability, Chang et al., 2009
    model.hrv.include = 1;
    
    % one or multiple delays (in seconds) can be specified to shift
    % canonical HRV response function from Chang et al., 2009 paper
    % Delays e.g. 0:6:24s (Shmueli et al, 2007, NeuroImage 38)
    model.hrv.delays = 0;

Then, you will see the heart rate, sampled at the onset slice for every volume, as physio.ons_secs.hr in the output physio.mat, see here for more details.

I hope that helps.

All the best,
Lars