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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

2.2K
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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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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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....
481
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

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Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
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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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Related Experiment Video

Updated: Jun 4, 2025

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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Identifying early left atrial dysfunction in COPD patients using ECG morphology-voltage-P wave duration score.

Uğur Küçük1, Pınar Mutlu2, Arzu Mirici2

  • 1Department of Cardiology, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, Turkey.

Journal of Electrocardiology
|December 25, 2024
PubMed
Summary

The morphology-voltage-P wave duration electrocardiography (MVP ECG) score effectively identifies early left atrial (LA) dysfunction in Chronic Obstructive Pulmonary Disease (COPD) patients. This score aids in detecting atrial remodeling, a key factor in cardiovascular complications.

Keywords:
12‑lead electrocardiogramLeft atrial functionStrain echocardiography

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Area of Science:

  • Cardiology
  • Pulmonology
  • Medical Diagnostics

Background:

  • Chronic Obstructive Pulmonary Disease (COPD) is linked to left atrial (LA) dysfunction, potentially increasing cardiovascular risks.
  • Early detection of LA dysfunction is crucial for managing COPD-related cardiovascular complications.

Purpose of the Study:

  • To evaluate the predictive value of the morphology-voltage-P wave duration electrocardiography (MVP ECG) score for identifying early LA dysfunction in COPD patients.
  • To assess the MVP ECG score's ability to detect subclinical atrial remodeling.

Main Methods:

  • A cross-sectional study involving 101 COPD patients.
  • Patients underwent speckle tracking echocardiography to assess LA function.
  • Classification into normal and abnormal LA function groups.

Main Results:

  • Significant differences in Peak Atrial Longitudinal Strain (PALS) were observed between groups (normal: 28.74±1.81%, abnormal: 18.44±1.87%, p<0.001).
  • An MVP ECG score >2.5 predicted abnormal LA function with 65% sensitivity and 91% specificity (AUC: 0.873, p<0.001).
  • LA diameter was similar between groups, highlighting subclinical changes.

Conclusions:

  • The MVP ECG score demonstrates potential for early identification of atrial remodeling in COPD.
  • This non-invasive score may assist clinicians in risk stratification for cardiovascular events in COPD patients.