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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

3.1K
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

Instrumentation Amplifier

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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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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
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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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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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Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Related Experiment Video

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Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
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ECG Patient Simulator Based on Mathematical Models.

Mario Alan Quiroz-Juárez1, Juan Alberto Rosales-Juárez2, Omar Jiménez-Ramírez2

  • 1Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Queretaro 76230, Mexico.

Sensors (Basel, Switzerland)
|August 12, 2022
PubMed
Summary
This summary is machine-generated.

We developed a low-cost electronic device that simulates realistic electrocardiogram (ECG) waveforms using mathematical models. This versatile ECG simulator can reproduce over thirty cardiac rhythms for testing medical equipment and software.

Keywords:
ECG simulatorbiomedical engineeringcardiac dynamicsembedded systemsynthetic ECG generation

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Area of Science:

  • Biomedical Engineering
  • Computational Cardiology
  • Electronic Systems Design

Background:

  • Electrocardiogram (ECG) analysis is crucial for diagnosing heart conditions.
  • High-fidelity ECG acquisition and processing are essential for clinical accuracy.
  • Existing ECG simulators may lack versatility or cost-effectiveness.

Purpose of the Study:

  • To develop a versatile, low-cost, and tunable electronic device for generating realistic ECG waveforms.
  • To simulate a wide range of cardiac rhythms, including pathological conditions.
  • To provide a platform for testing and validating ECG equipment and software.

Main Methods:

  • Utilized four distinct mathematical models based on ordinary differential equations to describe heartbeat dynamics.
  • Implemented models including heterogeneous oscillators, a discretized reaction-diffusion system, coupled oscillators, and quasiperiodic motion.
  • Developed a hybrid analog-digital circuit with digital-to-analog converters controlled by a graphical interface.

Main Results:

  • The device successfully generates full 12-lead ECG profiles and simulates various rhythm disorders.
  • Reproduced approximately thirty-two distinct cardiac rhythms, with potential for simulating new arrhythmias.
  • Demonstrated versatility in simulating a wide range of pathological cardiac conditions.

Conclusions:

  • The proposed electronic device offers a cost-effective and flexible solution for ECG simulation.
  • It serves as a valuable tool for assessing the performance of electrocardiograph equipment and signal processing software.
  • The generated 12-lead ECG profiles can be utilized in patient monitoring systems and clinical trials.