Before scrolling down, try to think of the possible diagnoses for this ECG.
This ECG shows a regular narrow complex tachycardia at a rate of 140/min.
It is a long RP tachycardia with superior P axis.
The possibilities are-
- Fast-slow AVNRT (slow retrograde conduction in an AVNRT)
- PJRT (slow retrograde conduction in an AVRT)
- Ectopic atrial tachycardia (focus near AV node)