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== Brugada criteria == | == Brugada criteria == | ||
{| class="wikitable" width="500px" | {| class="wikitable" width="500px" | ||
! colspan="3" |Brugada criteria | ! colspan="3" |Brugada criteria to differentiate [[SVT]] from [[VT]] <cite>Brug1</cite> | ||
|- | |- | ||
| | | Are there fusion or capture beats? (this is not an item from Brugada, it is however very specific|| Yes? => VT || specificy=100% [[image:fusionbeat.png|thumb|100px]] | ||
|- | |- | ||
| RS complexen | | RS complexen missing in the chest leads? || Yes? => [[VT]] || sensitivity=21% specificity=100% | ||
|- | |- | ||
| RS-interval in | | RS-interval in one of the cheast leads > 100 msec (in the absence of anti-arrhythmics)? || Yes? => VT || sensitivity=66% specificity=98% | ||
|- | |- | ||
| | | [[AV-dissociation]]? || Yes? => probably [[VT]] (Note [[AVNRT]] can also present with AV dissociation!)|| sensitivity=82% specifity=98% | ||
|- | |- | ||
! colspan="3" | | ! colspan="3" | Morphological criteria (if the above criteria are inconclusive) | ||
|- | |- | ||
!colspan="3" |[[ | !colspan="3" |[[LBBB]] pattern | ||
|- | |- | ||
| | | Initial R more than 40ms? ||Yes => VT || [[Image:Rhythm_RSratio.png|thumb|100px]] | ||
|- | |- | ||
| Slurred of | | Slurred or notched downwards leg of S wave in leads V1 or V2 || Yes => [[VT]] || | ||
|- | |- | ||
| | | Beginning of Q to nadir QS >60 ms in V1 or V2? || Yes => [[VT]] || LR >50:1 | ||
|- | |- | ||
| Q | | Q or QS in V6? || Yes => [[VT]] || LR >50:1 | ||
|- | |- | ||
| colspan="3" |[[Image:Rhythm_LBTBmorph_en.png|thumb|300px]] | | colspan="3" |[[Image:Rhythm_LBTBmorph_en.png|thumb|300px]] | ||
|- | |- | ||
! colspan="3" |[[ | ! colspan="3" |[[RBBB]] pattern | ||
|- | |- | ||
| | | Monofasic R or qR in V1? ||Yes => [[VT]] || | ||
|- | |- | ||
| R | | R taller than R' (rabbit-ear sign)?||Yes => [[VT]] || LR >50:1 | ||
|- | |- | ||
| rS in V6? || | | rS in V6? || Yes => VT || LR >50:1 | ||
|- | |- | ||
| colspan="3" |[[Image:Rhythm_RBTBmorph_en.png|thumb|300px]] | | colspan="3" |[[Image:Rhythm_RBTBmorph_en.png|thumb|300px]] | ||
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{{clr}} | {{clr}} | ||
== | ==Examples== | ||
<gallery> | <gallery> | ||
Image:wide_qrs_tachy_AAM1.jpg| | Image:wide_qrs_tachy_AAM1.jpg|Wide complex tachycardia. No AV dissociation. RBBB. Resembles sinus rhythm from the same patient. Conclusio SVT with [[RBBB]] | ||
Image:wide_qrs_tachy_AAM2.jpg|ECG | Image:wide_qrs_tachy_AAM2.jpg|ECG from the same patient in sinus rhythm. The QRS complex is very similiar. | ||
Image:wide_qrs_tachy_AAM3.png| | Image:wide_qrs_tachy_AAM3.png|Wide complex tachycardia. LBBB configuration. Absence of RS in the chest leads. [[AV dissociation]] is present. Conclusion: [[VT]] | ||
Image:wide_qrs_tachy_AAM4.png| | Image:wide_qrs_tachy_AAM4.png|Wide complex tachycardia. LBBB configuration. Absence of RS in the chest leads. [[AV dissociation]] is present. Conclusion: [[VT]]`ß | ||
</gallery> | </gallery> | ||
== Referenties == | == Referenties == |