Key Learning Points
In clinical practice:
- The vast majority of BCT encountered will be VT
- Any regular BCT should be assumed to be ventricular in origin
- Any irregular BCT that is sustained is most likely to be AF
- Monomorphic VT usually has a RBBB pattern, an abnormal axis and is always regular
- Polymorphic VT is uncommon and rarely sustained
- Fascicular tachycardia may be misdiagnosed as of supraventricular origin as the QRS duration is relatively short. Look out for RBBB pattern and left axis deviation
- RVOT can be treated like an SVT. Look out for LBBB and right axis deviation