What is the rate of flutter waves in atrial flutter?

Atrial flutter results from an abnormal circuit inside the right atrium, or upper chamber of your heart. It beats extra fast, about 250-400 beats per minute .29 May 2020

The atrial rate during atrial flutter is between 250 and 350 bpm . At this rate, the AV node is usually refractory long enough to block at least every other beat from conducting to the ventricles. The class IC antiarrhythmic drugs can slow the atrial rate and increase AV nodal conduction as well.

Atrial flutter is an abnormal cardiac rhythm characterized by rapid, regular atrial depolarizations at a characteristic rate of approximately 300 beats/min and a regular ventricular rate of about 150 beats/min in patients not taking atrioventricular (AV) nodal blockers.