Difference between revisions of "Low ECG voltage"

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(Text replacement - "==Diagnosis==" to "==Evaluation==")
 
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==Definition<ref>Madias JE. Low QRS voltage and its causes. J Electrocardiol. 2008;41(6):498–500. doi:10.1016/j.jelectrocard.2008.06.021</ref>==
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==Background==
*QRS < 5 mm in limb leads
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===General Causes===
*QRS < 10 mm in chest leads
 
 
 
==General Causes==
 
 
*Fluid, fat or air attenuating signal
 
*Fluid, fat or air attenuating signal
 
*Myocardial infiltration
 
*Myocardial infiltration
 
*Loss of viable myocardium
 
*Loss of viable myocardium
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==Clinical Features==
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*Frequently asymptomatic, depends on underlying cause
  
 
==Differential Diagnosis==
 
==Differential Diagnosis==
 
[[File:Low_Voltage_ECG.png|thumb|Specific causes of low voltage ECG]]
 
[[File:Low_Voltage_ECG.png|thumb|Specific causes of low voltage ECG]]
=== Cardiac ===
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===[[Low ECG voltage]]===
*Post-MI
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====Cardiac====
*Infiltrative cardiomyopathy
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*Post-[[MI]]
*Myocarditis
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*[[Infiltrative cardiomyopathy]]
*Hypothyroidism
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*[[Myocarditis]]
=== Pericardial ===
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*[[Hypothyroidism]]
*Effusion
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*Constrictive pericarditis
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====Pericardial====
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*[[Pericardial effusion|Effusion]]
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*Constrictive [[pericarditis]]
 
*Pneumopericardium
 
*Pneumopericardium
=== Extracardiac ===
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*COPD (limb leads)
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====Extracardiac====
*Pneumomediastinum
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*[[COPD]] (limb leads)
*Pneumothorax
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*[[Pneumomediastinum]]
*Pleural effusion
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*[[Pneumothorax]]
*Pulmonary edema
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*[[Pleural effusion]]
*Peripheral edema
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*[[Pulmonary edema]]
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*[[Peripheral edema]]
 
*Obesity
 
*Obesity
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==Evaluation==
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[[File:Low voltage ECG.png|thumb|Sample ECG]]
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*[[ECG]]<ref>Madias JE. Low QRS voltage and its causes. J Electrocardiol. 2008;41(6):498–500. doi:10.1016/j.jelectrocard.2008.06.021</ref>
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**QRS < 5 mm in limb leads
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**QRS < 10 mm in chest leads
 +
 +
==Management==
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*Treat underlying condition
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==Disposition==
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*Depends on underlying condition
  
 
==See Also==
 
==See Also==
 
*[[ECG Basics]]
 
*[[ECG Basics]]
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==External Links==
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*[http://ddxof.com/low-voltage-ecg/ DDxOf: Differential Diagnosis of Low Voltage ECG]
  
 
==References==
 
==References==

Latest revision as of 10:43, 22 July 2016

Background

General Causes

  • Fluid, fat or air attenuating signal
  • Myocardial infiltration
  • Loss of viable myocardium

Clinical Features

  • Frequently asymptomatic, depends on underlying cause

Differential Diagnosis

Specific causes of low voltage ECG

Low ECG voltage

Cardiac

Pericardial

Extracardiac

Evaluation

Sample ECG
  • ECG[1]
    • QRS < 5 mm in limb leads
    • QRS < 10 mm in chest leads

Management

  • Treat underlying condition

Disposition

  • Depends on underlying condition

See Also

External Links

References

  1. Madias JE. Low QRS voltage and its causes. J Electrocardiol. 2008;41(6):498–500. doi:10.1016/j.jelectrocard.2008.06.021