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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

8.3K
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...
8.3K
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

19.2K
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....
19.2K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

2.0K
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...
2.0K
Electrophysiology of Normal Cardiac Rhythm01:19

Electrophysiology of Normal Cardiac Rhythm

10.4K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
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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...
15.4K
ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

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

1.0K
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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Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
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Electrocardiogram reference intervals for clinically normal wild-born chimpanzees (Pan troglodytes).

Rebeca Atencia, Luis Revuelta, John D Somauroo

    American Journal of Veterinary Research
    |July 25, 2015
    PubMed
    Summary

    This study establishes crucial electrocardiogram (ECG) reference intervals for healthy chimpanzees, aiding in early detection of cardiac disease. These species-specific ECG values are vital for monitoring chimpanzee heart health.

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    Area of Science:

    • Veterinary Cardiology
    • Primate Physiology
    • Comparative Electrocardiography

    Background:

    • Cardiac disease is a leading cause of mortality in captive chimpanzees.
    • Establishing species-specific electrocardiogram (ECG) reference intervals is essential for accurate diagnosis and management of cardiovascular conditions in chimpanzees.
    • Previous research lacks comprehensive ECG data for healthy wild-born chimpanzees.

    Purpose of the Study:

    • To determine reference intervals for key electrocardiogram (ECG) variables in clinically normal chimpanzees (Pan troglodytes).
    • To provide a baseline for assessing cardiac health and identifying potential abnormalities in chimpanzee populations.
    • To aid in the diagnosis and treatment of heart disease in chimpanzees.

    Main Methods:

    • Electrocardiograms were collected from 100 clinically normal wild-born chimpanzees (51 young, 49 adult).
    • Key ECG variables including heart rate, PR interval, QRS duration, QT interval, and various axes were analyzed.
    • Reference intervals were calculated using standard statistical methods (mean ± 1.96•SD or 5th-95th percentiles).

    Main Results:

    • Species-specific ECG reference intervals were successfully generated for both young and adult chimpanzees.
    • Most chimpanzees exhibited normal sinus rhythm and P wave morphology.
    • A significant proportion of both young (47%) and adult (61%) chimpanzees showed electrocardiographic evidence of left ventricular hypertrophy (LVH).

    Conclusions:

    • The generated ECG reference intervals provide a vital tool for veterinary professionals managing chimpanzee health.
    • Abnormal ECG findings outside these intervals warrant further cardiac assessment and monitoring.
    • Implementing these species-specific standards can improve the diagnosis and treatment of cardiac disease in chimpanzees, potentially reducing mortality.