Final answer:
The ECG of atrial flutter typically exhibits a sawtooth pattern known as flutter waves, most prominently in leads II, III, and aVF, the inferior leads.
Step-by-step explanation:
The ECG of atrial flutter typically shows a characteristic sawtooth pattern known as flutter waves. These flutter waves are most evident in leads II, III, and aVF, which are the inferior leads of a 12-lead ECG. The pattern results from the rapid, regular reentrant atrial activation that is the hallmark of atrial flutter. These flutter waves can sometimes be seen in other leads as well, but they are most prominent in the inferior leads.