Difference between revisions of "Electrocardiography"

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(New page: {{unfinished}} Electrocardiography is one of the most commonly found piece of monitoring equipment in modern veterinary practices. It detects the electrical activity of the heart through ...)
 
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==Introduction==
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Electrocardiography is one of the most commonly found piece of monitoring equipment in modern veterinary practices. It detects the electrical activity of the heart through 3 electrodes. These electrodes are most commonly placed on the 2 forelimbs and the left hindlimb. The electrodes are attached to the patient via ECG pads (most commonly), crocodile clips (more common in horses) and transcutaneous needles (rare). Frequently, additional electrode gel or alcohol is required to improve contact between the patient and electrodes.
  
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Electrocardiography is one of the most commonly found piece of monitoring equipment in modern veterinary practices. It detects the electrical activity of the heart through 3 electrodes. These electrodes are most commonly placed on the 2 forelimbs and the left hindlimb. The electrodes are attached to the patient via ECG pads (most commonly), crocodile clips (more common in horses) and transcutaneous needles (rare). Frequently, additional electrode gel or alcohol is required to improve contact between the patient and electrodes.
 
  
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==Reading an ECG Trace==
  
 
An ECG supplies information about the electrical activity of the heart only. It indicates the heart rate and rhythm and can be used to detect any arrhythmias. It does not supply information about cardiac function
 
An ECG supplies information about the electrical activity of the heart only. It indicates the heart rate and rhythm and can be used to detect any arrhythmias. It does not supply information about cardiac function
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[[Image:ECG.jpg|left|]]
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<center>
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{| border="1" cellpadding="6"
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|-style="background:#B0E0E6; color:black"
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!'''Stage'''
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!'''Represents'''
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|-
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|<font color=#0C1A5D> '''P''' </font>
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|Atrial Depolarisation
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|- style="background:#F0F8FF; color:black"
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|<font color=#0C1A5D>'''QRS''' </font>
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|Ventricular Depolarisation
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|-
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|<font color=#0C1A5D>'''T''' </font>
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|Ventricular Repolarisation
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|- style="background:#B0E0E6; colour:black"
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|}
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</center>
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When interpreting ECG traces it is important to remember the following rules so that arrhythmias can be detected early and treated if necessary.
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*Is there a P for every QRS?
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*Is there a QRS for every P?
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*Are they all reasonably related?
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*Are they all the same?

Revision as of 18:48, 11 April 2009


 This article is still under construction.


Introduction

Electrocardiography is one of the most commonly found piece of monitoring equipment in modern veterinary practices. It detects the electrical activity of the heart through 3 electrodes. These electrodes are most commonly placed on the 2 forelimbs and the left hindlimb. The electrodes are attached to the patient via ECG pads (most commonly), crocodile clips (more common in horses) and transcutaneous needles (rare). Frequently, additional electrode gel or alcohol is required to improve contact between the patient and electrodes.


Reading an ECG Trace

An ECG supplies information about the electrical activity of the heart only. It indicates the heart rate and rhythm and can be used to detect any arrhythmias. It does not supply information about cardiac function

ECG.jpg
Stage Represents
P Atrial Depolarisation
QRS Ventricular Depolarisation
T Ventricular Repolarisation







When interpreting ECG traces it is important to remember the following rules so that arrhythmias can be detected early and treated if necessary.

  • Is there a P for every QRS?
  • Is there a QRS for every P?
  • Are they all reasonably related?
  • Are they all the same?
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