What describes atrial flutter?

Atrial flutter is characterized by rapid but regular contractions of the atria, which creates a distinctive rhythm often observed on an electrocardiogram (ECG). This condition arises due to a reentrant circuit in the atria that causes them to beat at a faster rate while maintaining a consistent rhythm, generally around 240 to 340 beats per minute.

The regularity of the contractions distinguishes atrial flutter from other arrhythmias such as atrial fibrillation, where the atrial contractions are irregular and chaotic. In atrial flutter, the consistent pattern can lead to a more organized atrial rhythm, although the rapid rate can still lead to hemodynamic consequences if not managed appropriately. Understanding this characteristic is important for diagnosing and treating the condition effectively, as it can affect the overall cardiac function and increase the risk of thromboembolism if not adequately addressed.