QRS Morphology: Difference between revisions
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*Does the QRS complex show [[microvoltations]] (roughly QRS < 5mm)? | *Does the QRS complex show [[microvoltations]] (roughly QRS < 5mm)? | ||
*Is the conduction normal or [[Conduction delay|delayed]] (QRS-interval > 0,12s)? | *Is the conduction normal or [[Conduction delay|delayed]] (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 V3, this could be a sign of a (previous) [[Posterior MI|posterior myocardial infarction]]. | *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]]. | ||
If all these questions can be answered with 'no' you can go on to the next step: [[ST morphology]]. | If all these questions can be answered with 'no' you can go on to the next step: [[ST morphology]]. | ||
Revision as of 08:54, 22 August 2007
| «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 | ||
The basic questions in judging QRS morphology are:
- Are there any pathological Q waves as a sign of previous myocardial infarction?
- Are there signs of left or right ventricular hypertrophy?
- Does the QRS complex show microvoltations (roughly QRS < 5mm)?
- Is the conduction normal or delayed (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 myocardial infarction. Other causes are noted in the chapter Clockwise and Counterclockwise rotation.
If all these questions can be answered with 'no' you can go on to the next step: ST morphology.