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Related Concept Videos

Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

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Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
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Related Experiment Video

Updated: Sep 14, 2025

An Application for Pairing with Wearable Devices to Monitor Personal Health Status
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Ultra-short-term heart rate variability using a photoplethysmography-based smartphone application: a TeleCheck-AF

Henrike Aenne Katrin Hillmann1, Astrid N L Hermans2, Monika Gawalko2,3,4

  • 1Hannover Heart Rhythm Center, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany.

European Heart Journal. Digital Health
|July 24, 2025
PubMed
Summary

Photoplethysmography (PPG) via smartphone reliably assesses ultra-short-term heart rate variability (HRV) for atrial fibrillation (AF) management. This mobile health approach shows high patient compliance and data consistency.

Keywords:
Atrial fibrillationDigital devicesHeart rate variabilityPhotoplethysmographyRemote monitoringTelemonitoring

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Area of Science:

  • Cardiology
  • Digital Health
  • Biomedical Engineering

Background:

  • Autonomic nervous system (ANS) activation is crucial in atrial fibrillation (AF) pathophysiology.
  • Heart rate variability (HRV) quantifies ANS activity.
  • Assessing ultra-short-term HRV using photoplethysmography (PPG) is an emerging area.

Purpose of the Study:

  • To evaluate the feasibility of using PPG recordings for ultra-short-term HRV assessment.
  • To determine the efficacy of a mobile health approach (TeleCheck-AF) for remote AF management.

Main Methods:

  • Utilized a PPG-based smartphone application within the TeleCheck-AF framework.
  • Included 855 patients with 13,465 recordings in sinus rhythm.
  • Assessed resting heart rate, root mean square of successive differences (RMSSD), patient compliance, and data consistency.

Main Results:

  • Achieved 95.2% patient compliance with high inter-recording consistency.
  • Median heart rate was 66.5 bpm and median RMSSD was 40 ms.
  • RMSSD varied based on sex, CHA2DS2-VA score, AF history, ablation status, age, and BMI.

Conclusions:

  • One-minute PPG recordings can accurately determine ultra-short-term HRV.
  • The TeleCheck-AF approach demonstrates high user compliance and consistency.
  • This mobile health strategy may be applicable to other conditions involving HRV.