The atrial rates during atrial flutter vary from 250 to 350 beats per minutes, slower than the 400 to 600 bpm seen in atrial fibrillation. Frequently, a 2:1 conduction ratio occurs, resulting in a ...
though atrial flutter with variable conduction of the P waves can also occur. In this situation, there may be three P waves to one QRS complex, then a quick change to two P waves to one QRS ...