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Related Concept Videos

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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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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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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ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

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An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
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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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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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Updated: Aug 22, 2025

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Automatic ECG Quality Assessment Techniques: A Systematic Review.

Kirina van der Bijl1, Mohamed Elgendi1, Carlo Menon1

  • 1Biomedical and Mobile Health Technology Lab, ETH Zurich, 8008 Zurich, Switzerland.

Diagnostics (Basel, Switzerland)
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

Effective screening for cardiovascular diseases using electrocardiogram (ECG) analysis is crucial. This review examines automatic ECG quality assessment techniques, highlighting their accuracy and areas for improvement in clinical settings.

Keywords:
ambulatory monitoringartefact detectionelectrocardiogram (ECG)physiological signalsquality assessmentsignal quality indexes (SQIs)

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Area of Science:

  • Biomedical Engineering
  • Cardiology
  • Signal Processing

Background:

  • Cardiovascular diseases are the leading global cause of death, with stroke and heart attacks comprising over 80% of related fatalities.
  • Accurate diagnosis via electrocardiogram (ECG) analysis is vital for preventing patient mismanagement and saving lives.
  • ECG recordings are frequently compromised by noise, which degrades signal quality and complicates diagnosis.

Purpose of the Study:

  • To review research on automatic ECG quality assessment techniques published between 2012 and 2022.
  • To identify common methodologies, datasets, and performance metrics in automatic ECG quality assessment.
  • To discuss limitations in current research and propose recommendations for advancing the field.

Main Methods:

  • A systematic review of scientific literature focusing on automatic ECG quality assessment algorithms.
  • Analysis of studies utilizing the CinC11 Dataset for training and testing algorithms.
  • Evaluation of reported algorithm accuracy rates and assessment methodologies.

Main Results:

  • The CinC11 Dataset is the most frequently used resource for algorithm development and validation.
  • Most studies evaluated ECG quality on a per-lead basis, with limited real-time testing.
  • Reviewed algorithms demonstrated accuracy ranging from 85.75% to 97.15%.

Conclusions:

  • Current automatic ECG quality assessment research requires greater methodological clarity for effective clinical implementation.
  • Further research should focus on real-time applications and comprehensive subject demographic data.
  • Standardized evaluation protocols are needed to improve the reliability and generalizability of ECG quality assessment techniques.