HRVAnalysis

Component Type: Processor (Subcategory: DSP and feature extraction)

This component calculates various Heart Rate Variability (HRV) parameters from an incoming signal of raw ECG-data. For a detailed description of the HRV parameters and a guide how to use optical and electrical heart rate sensors see the work of Andreas Schreiber (in /documentation/DIYGuides/HRVAnalysis_Schreiber.pdf and /documentation/OpticalPulseSensor_Schreiber.pdf)

HRVAnalysis plugin

Input Port Description

• HRVInput [double]: Input port for the raw signal

Output Port description

• runtime [double]: the current time, since the first sample, in seconds
• pulserate [double]: the current calculated pulserate
• SDNN [double]: the standard deviation of all RR-intervals
• rMSSD [double]: the square-root of the average sum of the quadratic differences between neighboring RR-intervals
• SDSD [double]: the current standard deviation of successive differences between neighbouring RR-intervals
• pNN50 [double]: the numer of successive RR-intervales that differ by more than 50ms (expressed as percentage of all RR-intervals)
• pNN20 [double]: the numer of successive RR-intervales that differ by more than 20ms (expressed as percentage of all RR-intervals)
• DD [double]: the deviation of 2 succesive RR-intervals

Event Listener Description

• start: An incoming event starts the HRV analysis

Properties

• samplerate [double]: specifies the sample rate of the incoming signal.
• outlierRange [double]: Defines factor of the mean R-amplitudes which is used as a threshold to detect spikes / signal artefacts.