Atrial flutter is a type of supraventricular tachycardia, characterized by an abnormal, rapid heart rhythm. The criteria for diagnosis of atrial flutter include a regular, at least 250 beats per minute (bpm) heart rate, and characteristic flutter waves on an electrocardiogram (ECG). Clinically, patients may experience palpitations, chest discomfort, dizziness, fatigue, or shortness of breath. In order to confirm the diagnosis, a physical exam should be conducted, and an ECG, echocardiogram, and/or Holter monitor should be performed. If necessary, a cardiac electrophysiology procedure may be recommended to assess the condition of the atria. The goal of treatment is to restore the normal heart rhythm, and this can often be accomplished with medications, such as beta-blockers, calcium channel blockers, or antiarrhythmic drugs. In some cases, a catheter ablation procedure may be necessary to correct the abnormal electrical activity.