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Videos de Conceptos Relacionados

Electrocardiogram01:29

Electrocardiogram

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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.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
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Instrumentation Amplifier01:25

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An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
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Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
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Pulse rhythm01:30

Pulse rhythm

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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.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
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Bode Plots Construction01:24

Bode Plots Construction

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The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):
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ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

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Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
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Updated: Sep 9, 2025

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Tipo de actividad Efectos de la calidad de la señal en los aparatos de electrocardiograma

Bryndan Lindsey1, Samantha Snyder2, Yuanyuan Zhou3

  • 1Johns Hopkins Applied Physics Laboratory (JHU/APL), Laurel, MD 20723, USA.

Sensors (Basel, Switzerland)
|August 28, 2025
PubMed
Resumen

Los dispositivos de electrocardiograma (ECG) comerciales muestran una calidad de señal variable durante las actividades dinámicas. El Polar H10 demostró un rendimiento más robusto en diversos ejercicios en comparación con el Zephyr BioHarness 3.0.

Palabras clave:
Calidad de la señal ECGEl electrocardiogramaartefacto de movimientoseguimiento fisiológicoDispositivos portátiles de ECG

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Área de la Ciencia:

  • Ingeniería biomédica
  • Ciencias del deporte
  • Monitoreo fisiológico

Sus antecedentes:

  • Los dispositivos de electrocardiograma (ECG) son cruciales para el monitoreo de la frecuencia cardíaca (HR) y la variabilidad de la frecuencia cardíaca (HRV).
  • La calidad de la señal de los dispositivos portátiles de ECG puede degradarse durante las actividades no verticales debido a artefactos de movimiento e interferencia muscular.
  • Los protocolos de validación existentes pueden no representar adecuadamente los escenarios de uso dinámicos del mundo real.

Objetivo del estudio:

  • Comparar la calidad de la señal de ECG de tres dispositivos portátiles comerciales y un monitor de ECG de múltiples cables durante diversas actividades físicas.
  • Evaluar el impacto de los diferentes tipos de actividades (caminar en la cinta de correr, entrenamiento en circuito, carrera de obstáculos) en la integridad de la señal del ECG.
  • Identificar los dispositivos que mantienen una calidad de señal superior en condiciones dinámicas y no verticales.

Principales métodos:

  • Comparación de la calidad de la señal utilizando el índice de calidad de la señal de latidos (SQI) para los dispositivos Polar H10, Equivital EQ-02, Zephyr BioHarness 3.0 y BIOPAC.
  • Evalúa el rendimiento del ECG durante la caminata en cinta, el entrenamiento en circuito y una carrera de obstáculos.
  • Las tasas de rechazo de la señal calculadas en función de los umbrales SQI (<0,7) y de la plausibilidad fisiológica.

Principales resultados:

  • Tanto el tipo de dispositivo como la actividad afectaron significativamente la calidad de la señal ECG (p < 0,001).
  • Se observaron tasas más altas de rechazo de la señal durante la carrera de obstáculos y el entrenamiento en circuito en comparación con la caminata en cinta de correr (p < 0,01).
  • El Zephyr BioHarness 3.0 mostró tasas de rechazo más altas que el Polar H10 y el BIOPAC; el Polar H10 mostró tasas de rechazo promedio más bajas.

Conclusiones:

  • Las actividades dinámicas y no verticales afectan significativamente la calidad de la señal ECG en los dispositivos comerciales.
  • El Polar H10 demostró una mayor robustez en diversas actividades en comparación con el Zephyr BioHarness 3.0.
  • Los protocolos de validación de los dispositivos de ECG deben incorporar tareas realistas y dinámicas para reflejar el rendimiento en el mundo real.