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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

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 the T...
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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 to...
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

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. When...

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Real-Time Electrocardiogram Monitoring During Treadmill Training in Mice
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Electrocardiographic reference values in whippets.

Valérie Bavegems1, Luc Duchateau, Luc Van Ham

  • 1Department of Medicine and Clinical Biology of Small Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium. valerie.bavegems@UGent.be

Veterinary Journal (London, England : 1997)
|June 16, 2009
PubMed
Summary

This study establishes electrocardiographic reference values for whippets, revealing higher R-wave amplitudes. These findings help differentiate normal athletic heart patterns from potential cardiac disease in dogs.

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Area of Science:

  • Veterinary Cardiology
  • Canine Physiology

Background:

  • Electrocardiography (ECG) is crucial for assessing canine cardiac health.
  • Published ECG reference values are typically based on a general dog population.
  • Breed-specific variations in ECG parameters may exist, particularly in athletic breeds.

Purpose of the Study:

  • To determine breed-specific electrocardiographic characteristics of healthy whippets.
  • To compare whippet ECG parameters with existing reference values for the general dog population.
  • To identify potential ECG findings that might be misinterpreted as cardiac pathology.

Main Methods:

  • Analysis of electrocardiographic parameters from 105 healthy whippets.
  • Establishment of reference ranges for key ECG variables in the whippet breed.
  • Statistical comparison of whippet ECG data against published population norms.

Main Results:

  • Whippets exhibit significantly higher median R-wave amplitudes in leads II, CV(6)LL, and CV(6)LU compared to general dog populations.
  • A notable percentage of whippets exceeded established maximum reference values for P-wave and T-wave amplitudes, and ST-segment deflection in lead II, and R-wave amplitude in CV(5)RL.
  • ECG findings in whippets share similarities with human athletic heart syndrome.

Conclusions:

  • Whippets possess distinct electrocardiographic characteristics, including increased R-wave amplitudes.
  • These breed-specific findings can mimic signs of cardiac disease, necessitating awareness among clinicians.
  • Understanding these normal variations prevents misdiagnosis and unnecessary diagnostic procedures in healthy whippets.