Difference between revisions of "QRS Morphology"

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[[Image:Nsr.jpg|thumb|left| Normal sinus rhythm with normal QRS morphology.]]
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[[Image:Nsr.jpg|thumb|right|300px| Normal sinus rhythm with normal QRS morphology.]]
 
The basic questions in judging QRS morphology are:
 
The basic questions in judging QRS morphology are:
 
*Are there any [[Q waves|pathological Q waves]] as a sign of previous myocardial infarction?  
 
*Are there any [[Q waves|pathological Q waves]] as a sign of previous myocardial infarction?  
 
*Are there signs of left or right ventricular [[hypertrophy]]?  
 
*Are there signs of left or right ventricular [[hypertrophy]]?  
*Does the QRS complex show [[microvoltations]] (roughly QRS < 5mm)?
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*Does the QRS complex show [[microvoltage]] (roughly QRS < 5mm)?
 
*Is the conduction normal or [[Conduction delay|prolonged]] (QRS-interval > 0,12s)?  
 
*Is the conduction normal or [[Conduction delay|prolonged]] (QRS-interval > 0,12s)?  
 
*Is the R wave propagation normal? Normally R waves become larger from V1-V5. At V5 it should be maximal. If the R wave in V2 is larger than in V3, this could be a sign of a (previous) [[Posterior MI|posterior myocardial infarction]]. Other causes are noted in the chapter [[Clockwise and Counterclockwise rotation]].
 
*Is the R wave propagation normal? Normally R waves become larger from V1-V5. At V5 it should be maximal. If the R wave in V2 is larger than in V3, this could be a sign of a (previous) [[Posterior MI|posterior myocardial infarction]]. Other causes are noted in the chapter [[Clockwise and Counterclockwise rotation]].

Latest revision as of 16:05, 24 January 2010

«Step 5: P wave morphology Step 7: ST morphology»


Author(s) J.S.S.G. de Jong, MD
Moderator J.S.S.G. de Jong, MD
Supervisor
some notes about authorship
Normal sinus rhythm with normal QRS morphology.

The basic questions in judging QRS morphology are:

If all these items are normal you can go on to the next step: ST morphology.