What features identify atrial flutter on an EKG?

Atrial flutter is characterized by a distinct "sawtooth" appearance of P waves, which is often referred to as "F-waves" or "flutter waves." This pattern occurs because the atria contract rapidly and in a reentrant manner, leading to a regular, rapid atrial rate that produces a visual effect on the EKG resembling a serrated edge or sawtooth pattern, particularly visible in the inferior leads (II, III, and aVF).

The use of the term "sawtooth" is significant because it allows healthcare providers to readily identify this arrhythmia during EKG interpretation. The shape and consistency of these waves help to differentiate atrial flutter from other types of arrhythmias and provide important information about the atrial activity. Understanding the visual characteristics of atrial flutter is crucial for diagnosis and subsequent management of the patient.