LabChart software can import data from various file formats and then use LabChart's Pro modules for analysis. The most basic file format is a simple txt file.
However, LabChart modules work only on raw data wave forms if the HRV calculations are performed on ECG (and arterial pulse) recordings. In other words, the module must detect the R-peak to do the necessary calculations. It is possible to use the RR intervals (input from a text file) and create a "pseudo-ECG" trace (output text file), that can be opened by LabChart and results in a waveform that has peak intervals according to the input text file. This can then be analyzed with the HRV module.
Mac: PDF explaining the script, Applescript, example input file
Windows: PDF explaining the script, settings file for LabChart v7 and v8, example input file
For further technical assistance with this or any other issue, please contact ADInstruments Technical Support by clicking HERE.