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Related Experiment Video

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Assessing the Accuracy of Fitness Smartwatch Data for Cardiovascular and Physical Activity Monitoring: A Validation Study in Digital Health
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Clinical Validation of Heart Rate Apps: Mixed-Methods Evaluation Study.

Thijs Vandenberk1,2, Jelle Stans1, Christophe Mortelmans3

  • 1Mobile Health Unit, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium.

JMIR Mhealth and Uhealth
|August 27, 2017
PubMed
Summary

Smartphone heart rate (HR) apps can be validated using beat-to-beat analysis against ECG. This method ensures accurate mobile HR monitoring, comparing smartphone photoplethysmography (PPG) technology with clinical standards.

Keywords:
heart rateremote sensing technologysoftware validation

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Area of Science:

  • Biomedical Engineering
  • Digital Health
  • Cardiovascular Technology

Background:

  • Photoplethysmography (PPG) enables smartphone-based heart rate (HR) monitoring, offering scalable mobile health solutions.
  • Current validation methods for HR apps lack standardization, leading to inconsistent accuracy assessments compared to clinical standards.

Purpose of the Study:

  • To investigate and define essential elements for validating and comparing smartphone HR applications against established technologies.
  • To establish a reliable methodology for assessing the accuracy of mobile HR monitoring solutions.

Main Methods:

  • Two prospective studies utilized the FibriCheck app, comparing its HR measurements against FDA-cleared devices (Nonin oximeter, AliveCor ECG).
  • A beat-to-beat interval analysis was performed, comparing FibriCheck's peak-to-peak intervals (PPI) with synchronized ECG R-R intervals (RRI).

Main Results:

  • The first study showed high HR correlation (r=0.834-0.897) between FibriCheck and clinical devices, with no significant differences.
  • The second study demonstrated a strong correlation (rs=0.993) and low error (RMSE=23.04 ms) between FibriCheck PPI and ECG RRI, with no significant difference.

Conclusions:

  • Simultaneous HR measurement by a smartphone app and an ECG system, analyzed via beat-to-beat intervals, is the most suitable validation method.
  • This approach enhances the accuracy of HR app assessments, promoting reliable mobile cardiovascular monitoring.