Atrial flutter is an arrhythmia that is in some ways similar to atrial fibrillation - in atrial flutter, however, the frequency of atrial contractions is lower than in fibrillation. Atrial flutter is primarily caused by various heart diseases, but they are not the only ones that can lead to this heart rhythm disturbance. What other pathologies can result in atrial flutter, what are its symptoms and what is the treatment?