Improved
AVRT in the simulator, from the 12-lead engine
Before
The simulator drew AVRT with its own simpler model, and its article repeated what the 12-lead page now teaches.
After
The simulator's AVRT is the 12-lead engine's lead II: the same regular rhythm near 160 per minute, the same narrow QRS with no delta, and the retrograde P on the ST segment. The article is cut to the basics, with a card on to the 12-lead page.