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]] (if QRS is > 0,12s)? | *Is the conduction normal or [[Conduction delay|delayed]] (if QRS is > 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)[[Ischemia#posterior|posterior]]. | *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) [[Ischemia#posterior|posterior myocardial infarction]]. | ||
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]]. | ||
<analytics uacct="UA-807577-6"></analytics> | <analytics uacct="UA-807577-6"></analytics> | ||
Revision as of 15:30, 20 May 2007
| Author(s) | J.S.S.G. de Jong, MD | |
| Moderator | J.S.S.G. de Jong, MD | |
| Supervisor | ||
| some notes about authorship | ||
The basic question 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 (if QRS is > 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 myocardial infarction.
If all these questions can be answered with 'no' you can go on to the next step: ST morphology. <analytics uacct="UA-807577-6"></analytics>