<unk> /flutter is a heart rhythm disorder (arrhythmia).  It usually involves a rapid heart rate in which the upper heart chambers (atria) contract in a very disorganized and abnormal manner.  Instead of contracting regularly the small chamber has chaotic electrical impulses that cause the heart to beat in an irregularly irregular<unk> shion.
Atrial fibrillation
Atrial flutter
Sinus arrhythmia
Ventricular flutter
Supraventricular tachycardia
Ectopic atrial rhythm
Paroxysmal atrial fibrillation
Torsades de pointes