Heart Rate Variability (HRV) Add-on

OpenSignalsSKU: 870992004

Sale price€495,00


The Heart Rate Variability (HRV) add-on for the OpenSignals (r)evolution software is designed to process Electrocardiography (ECG) and Blood Volume Pulse (BVP) sensor data to extract Beat-to-Beat interval series from which temporal, spectral, and nonlinear HRV parameters are computed. All the algorithms were implemented according to the Standards of Measurement, Physiological Interpretation, and Clinical Use devised by the joint European Society of Cardiology and North American Society of Pacing Electrophysiology Task Force.


Heart Rate Detection Algorithm

The add-on allows one to apply custom filtering options, in order to improve the R-peak (Heartbeat indicator) detection for signals acquired under different conditions. This feature reduces the amount of falsely detected R-peaks even when applied on ECG data containing significant motion artifacts and non-traditional electrode placement configurations.

Compatible Sensors

Compatible biosignalsplux Sensors:
Compatible BITalino Sensors:

Extracted Parameters

Time Domain Parameters:

  • RRI & NNI Tachogram
  • RRI & NNI Histogram
  • Min., max. & mean NNI
  • Standard Deviation of the NNI series (SDNN)
  • Root-Mean-Squared of the NNI series (RMSSD)
  • NN20 (# of differences between successive NNI > 20ms)
  • pNN20 (ratio of NN20 vs. total number of NNI)
  • NN50 (# of differences between successive NNI > 50ms)
  • pNN50 (ratio of NN50 vs. total number of NNI)
  • Mean heart rate
  • NN50 (# of differences between successive NNI > 50ms)

Frequency Domain Parameters (Welch's Method):

  • Very Low Frequency band (VLF) parameters
  • Low Frequency band (LF) parameters
  • High Frequency band (HF) parameters
  • Peak Frequencies
  • Absolute Powers
  • Normalized Powers (LF & HF)
  • LF/HF ratio

Nonlinear Parameters:

  • Poincaré plot
  • Standard deviation along the minor axis (SD1)
  • Standard deviation along the major axis (SD2)
  • SD1/SD2 ratio



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