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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

1.8K
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...
1.8K
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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ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

364
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....
364
Exercise Stress Test01:26

Exercise Stress Test

148
Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
148
Pulse rhythm01:30

Pulse rhythm

734
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...
734

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Measuring Cardiac Autonomic Nervous System ANS Activity in Children
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Electrocardiogram screening for school children: a cross-sectional, population-based study.

Ali A Alakhfash1, Abdulrahman Al Mesned1, Waleed Al-Manea2

  • 1From the Department of Pediatric Cardiology, Prince Sultan Cardiac Center in Qassim, Buraidah, Saudi Arabia.

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Summary

Electrocardiogram (ECG) screening in schoolchildren identified prolonged QTc intervals as the most common abnormality, affecting 0.4% to 1.6%. This highlights ECG

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Area of Science:

  • Pediatric Cardiology
  • Clinical Electrocardiography
  • Public Health Screening

Background:

  • Early identification of life-threatening arrhythmogenic disorders is crucial for initiating preventive therapies.
  • Electrocardiogram (ECG) screening can detect conditions associated with sudden cardiac death (SCD) risk in children.
  • Large-scale ECG screening programs in schools can aid in early detection of cardiac abnormalities.

Purpose of the Study:

  • To assess the prevalence, clinical significance, and characteristics of ECG abnormalities in schoolchildren.
  • To determine the utility of childhood ECGs in detecting conditions linked to SCD risk.
  • To establish a model for community-based ECG screening programs for children.

Main Methods:

  • A population-based, cross-sectional study involving 14,403 elementary school students (ages 6-15) in Saudi Arabia.
  • Standardized 12-lead ECGs were performed and interpreted according to international guidelines.
  • Children with abnormal ECGs were referred for comprehensive pediatric cardiology evaluation, including echocardiography.

Main Results:

  • Abnormal ECG findings were detected in 3.3% (468 students) of the participants.
  • The most frequent abnormality identified was a prolonged QTc interval (≥460 msec), with a prevalence ranging from 0.4% to 1.6%.
  • Overall prevalence of abnormal ECG findings varied between 0.7% and 2.04%.

Conclusions:

  • Prolonged QTc intervals represent the most common ECG abnormality in the studied school-aged population.
  • Childhood ECG screening demonstrates potential for identifying individuals at risk for arrhythmogenic disorders.
  • This study provides a framework for implementing large-scale, community-based ECG screening initiatives for pediatric populations.