Overview
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 onlinear 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.
Supported Sensors
Included in the following kits
Specifications
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.
The following list presents an overview of all the computed parameters which can also be exported in the .CSV and .PDF file formats.Download our Sample Reports for this add-ons for more information.
Extracted Parameters
Time Domain
- RRI & NNI Tachogram
- Min., max. & mean NNI
- Root-Mean-Squared of the NNI Series (RMSSD)
- NN20 (# of differences between successive NNI > 20ms)
- NN50 (# of differences between successive NNI > 50ms)
- Standard deviation of the heart rate series
- RRI & NNI Histogram
- Standard Deviation of the NNI Series (SDNN)
- Mean Heart Rate
- pNN20 (ratio of NN20 vs. total number of NNI)
- pNN50 (ratio of NN50 vs. total number of NNI)
Frequency Domain(1)
- Peak Frequencies
- Very Low Frequency Band (VLF) Parameters
- High Frequency Band (VLF) Parameters
- Absolute Powers
- Low Frequency Band (VLF) Parameters
- Normalized powers (LF & HF)
Nonlinear Parameters
- Poincaré plot
- Standard deviation along the minor axis (SD1)
- SD1/SD2 ratio
- Detrended Fluctuation Analysis
- Standard deviation along the major axis (SD2)
(1) Power Spectral Density (PSD) computed using the Welch’s Method
