hea

heartpy

Python Heart Rate Analysis Package, for both PPG and ECG signals

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HeartPy - Python Heart Rate Analysis Toolkit

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Structural update

HeartPy V1.2 has landed! The structure of the package has been reworked to be in separate modules now in preparation of the next big update, which will feature many analysis expansions and the first steps towards a GUI for HeartPy. HeartPy has been growing steadily and had reached the point where it became cluttered and unwieldy to keep in a single file. The API remains unchanged.

An 'Examples' folder has been added to the repo which will be expanded soon. Now there's two notebooks explaining how to analyse ppg signals from smartwatches and smart rings.

Colorblind support has been added, see this notebook in the examples folder

Installation

python setup.py install

Alternatively, we're also on PIP:

python -m pip install heartpy

That's it! Note that Github always has the newest version.

Documentation

The official documentation is online! You can find the official documentation here

Python 2.7

The module compiles and and runs fine on Python 2.7, but the some unit tests fail.

Tutorial notebooks are now available in Examples/

These show how to handle various analysis tasks with HeartPy, from smartwatch data, smart ring data, regular PPG, and regular (and very noisy) ECG. The notebooks sometimes don't render through the github engine, so either open them locally, or use an online viewer like nbviewer.

We recommend you follow the notebooks in order:

More information

HeartPy, the Python Heart Rate Analysis Toolkit is a module for heart rate analysis in Python. It started as pure-python implementation to analyse physiological data taken in naturalistic driving and cycling experiments.

The module takes a discrete heart rate signal and outputs time-domain and frequency-domain measures often found in scientific literature:

Time domain:

  • beats per minute, BPM
  • interbeat interval, IBI
  • standard deviation if intervals between adjacent beats, SDNN
  • standard deviation of successive differences between adjacent R-R intervals, SDSD
  • root mean square of successive differences between adjacend R-R intervals, RMSSD
  • proportion of differences between R-R intervals greater than 20ms, 50ms, pNN20, pNN50
  • median absolute deviation, MAD
  • Poincare analysis (SD1, SD2, S, SD1/SD2)
  • Poincare plotting

Frequency domain (ranges per Shaffer and Ginsberg: https://doi.org/10.3389/fpubh.2017.00258)

  • very low frequency component (0.0033–0.04 Hz), VLF
  • low frequency component (0.04–0.15 Hz), LF
  • high frequency component (0.15–0.4 Hz), HF
  • lf/hf ratio, LF/HF

When using the package in your research, please cite:

van Gent, P., Farah, H., van Nes, N., & van Arem, B. (2019). Analysing Noisy Driver Physiology Real-Time Using Off-the-Shelf Sensors: Heart Rate Analysis Software from the Taking the Fast Lane Project. Journal of Open Research Software, 7(1), 32. DOI: http://doi.org/10.5334/jors.241

van Gent, P., Farah, H., van Nes, N., & van Arem, B. (2019). HeartPy: A novel heart rate algorithm for the analysis of noisy signals. Transportation Research Part F: Traffic Psychology and Behaviour, 66, 368–378. https://doi.org/10.1016/j.trf.2019.09.015

Documentation

You can find the official documentation here

The module is also to some extent described in my tutorial series:

License

The module is licensed under the GNU General Public License Version3, GPL-v3

Validation

Initial results of the validation have been reported in [1, 2].

[1]van Gent, P., Farah, H., van Nes, N., & van Arem, B. (2018). Heart Rate Analysis for Human Factors: Development and Validation of an Open Source Toolkit for Noisy Naturalistic Heart Rate Data. In Proceedings of the 6th HUMANIST Conference (pp. 173–178).

[2] van Gent, P., Farah, H., van Nes, N., & van Arem, B. (2019). HeartPy: A novel heart rate algorithm for the analysis of noisy signals. Transportation Research Part F: Traffic Psychology and Behaviour, 66, 368–378. https://doi.org/10.1016/j.trf.2019.09.015

To-do

The module is still in active development. See the changelog for past changes. The to-do for the coming months is:

to do before V1.3

  • Same but for PPG - morphology too variable, method unstable
  • Add 'strictness parameter' to affect how HeartPy evaluates peaks for acceptance/rejection
  • Add method to handle NaN data automatically
  • clean_rr method now removes incorrect values, update to allow for replacement by median of surrounding data points
    • add method that can fill in missing R-peaks, settable to search for either local optimum OR mean imputation.
  • Report validation performance on repo (published paper + key-points document once published)
  • Change backend structure in anticipation of GUI development
  • Develop GUI for HeartPy

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