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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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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
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Updated: Mar 24, 2026

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Sinabro: A Smartphone-Integrated Opportunistic Electrocardiogram Monitoring System.

Sungjun Kwon1, Dongseok Lee2, Jeehoon Kim3

  • 1Interdisciplinary Program in Bioengineering, Graduate School, Seoul National University, Seoul 08826, Korea. sjkwon@bmsil.snu.ac.kr.

Sensors (Basel, Switzerland)
|March 16, 2016
PubMed
Summary
This summary is machine-generated.

The Sinabro system offers unobtrusive smartphone electrocardiogram (ECG) monitoring. Enhanced features reliably capture ECG and derive accurate heart rate (HR) and heart rate variability (HRV) during daily use.

Keywords:
ECGopportunistic sensingphone case-typesensorsmartphone-integratedunobtrusive sensing

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Area of Science:

  • Biomedical Engineering
  • Digital Health
  • Wearable Technology

Background:

  • Smartphone integration for continuous health monitoring is advancing.
  • Unobtrusive sensing of physiological signals like ECG is crucial for pervasive healthcare.
  • Previous work introduced Sinabro, a smartphone-integrated ECG system for opportunistic monitoring.

Purpose of the Study:

  • To enhance the Sinabro system with upgraded sensor devices and improved feature extraction.
  • To evaluate the extended Sinabro system's performance in real-world daily smartphone use.
  • To assess the system's capability in reliably capturing ECG and deriving key cardiovascular features.

Main Methods:

  • Upgraded the sensor device for improved ECG signal acquisition.
  • Enhanced the feature extraction process for greater accuracy of ECG-derived metrics.
  • Conducted empirical analyses to determine optimal algorithm parameters for evaluation.
  • Evaluated the extended system during users' routine smartphone activities.

Main Results:

  • The upgraded sensor reliably captured electrocardiogram (ECG) signals.
  • The improved feature extraction achieved high accuracy for ECG-derived metrics, including heart rate (HR) and heart rate variability (HRV).
  • The system demonstrated a reasonable data drop rate during continuous, opportunistic monitoring.
  • The system effectively supports pervasive healthcare applications by providing contextual physiological data.

Conclusions:

  • The extended Sinabro system provides a reliable and accurate method for unobtrusive, smartphone-based ECG monitoring.
  • The system's ability to derive HR and HRV supports advanced pervasive healthcare applications.
  • Further development can leverage these enhanced capabilities for personalized health insights and stress level monitoring.