Release notes

Version 3.0.1 (released 27.4.2017)

Along this release, Kubios HRV Standard and Premium are available also for Linux operating systems. Compared to previous release, the following features, changes and bug fixes have been implemented (*indicates features available only in the Premium version):

  • Kubios HRV is now available also for Linux
  • Support for ECG data stored in Cardiology XML file format was added*
  • RR and ECG* text file importing was updated to support double-byte unicode files
  • QRS detection algorithm functionality was improved*
  • Kubios MAT file export was updated (the MAT file includes original data and all pre-processing steps as well as analysis settings are stored in this file, and, thus the MAT file can be used to fully store the analysis session)*
  • Kubios HRV version 2.2 color theme can now be selected from the software preferences to make Kubios more user friendly for people suffering red-green color blindness
  • Mean HR parameter computation fixed
  • Font visibility problem fixed
Version 3.0.0 (released 27.1.2017)

This was the first commercial release of Kubios HRV, launching of Kubios HRV Standard and Kubios HRV Premium versions. Compared to the previous release (ver. 2.2), the main new features of version 3.0 were (*indicates features available only in the Premium version):

  • Data support: 1) Polar IBI file support updated; 2) Custom ASCII file import support updated; 2*) ActiHeart and ActiWave Cardio data support added; 3*) Zephyr BioHarness data support added; 4*) annotations support for EDF+ files updated.
  • Pre-processing: 1*) An automatic RR artefact correction method was added. The new method provides enhanced artefact and ectopic beat detection performance and does not require a manual selection of optimal threshold value.
  • Time-domain HRV parameters: 1) Computation of minimum and maximum HR as average of 5 beats (default value, can be changed in preferences) was added; 2) NN50 and pNN50 parameters renamed as NNxx and pNNxx (default threshold is 50 ms, can be changed in preferences).
  • Frequency-domain HRV parameters: 1*) Lomb-Scargle periodogram was added as an alternative for Welch’s periodogram (selection can be made in preferences); 2) VLF, LF and HF band powers are now given also in natural logarithm scale; 3*) warning given if ECG derived respiration is outside the defined HF band.
  • Nonlinear HRV parameters: 1) Poincaré plot ratio SD2/SD1 was added.
  • Time-varying analysis*: Time-varying analysis methods added to HRV Premium. These methods include time trends for time-domain and frequency-domain parameters as well as for a limited number of nonlinear analysis parameters. Changes in time-frequency information of HRV data are assessed by spectrogram and a parametric Kalman smoother based time-varying spectrum estimate.
  • Reports and results export: 1*) ”SPSS friendly” batch file export was added; 2) Time-varying analysis results added to HRV report (additional page included); 3) Handling of report figures was updated (HRV Report and *ECG print). All report pages open in the same window, where the user can view the report pages, print selected pages or save pages to PDF file.
  • GUI and usability: 1) Visual layout of the software was changed; 2) HR (instead of RR) data visualisation can be selected in the GUI. In addition, several usability modifications to improve user experience.