| Term | Definition |
| What is the rate? | 60 - 100 |
| What is the rhythm? | Atrial regular, ventricular regular |
| Is there a P wave? | Inverted or absent, may appear before or after the QRS |
| Are the P waves upright and uniform? | n/a |
| What is the length of the PR Interval? | Usually less than 0.12 if P wave preceeds QRS; absent if no P wave occurs before QRS |
| Do all the QRS complexes look alike? | Yes |
| What is the length of the QRS complex? | Less than 0.12 |
| What is it? | increased automaticity in the av junction, causing the junction to discharge impulses at a rate faster than its intrinsic rate |