The difference between atrial fibrillation and atrial flutter generally lies in the different ECG manifestations, different disease . The causes of formation are different, the frequency is different, etc. 1. The electrocardiogram performance is different: in patients with atrial flutter, the atrial P wave disappears and is replaced by a flutter wave with regular amplitude. In patients with atrial fibrillation, the atrial P-wave also disappears, but the atrial P-wave is replaced by an atrial fibrillation energy wave of completely irregular amplitude. The ventricular rhythm of patients with atrial flutter is basically regular, while the ventricular rhythm of patients with atrial fibrillation is absolutely irregular. 2. The causes are different: atrial fibrillation is due to the incorrect potential transmitted from the pulmonary veins to the atria, resulting in the transformation of the P-wave into a very irregular F-wave. Atrial flutter, a large foldback loop in the atria, forms a relatively regular F wave. 3. Different frequencies: The frequency of the atrial discharge pulse in patients with atrial flutter is between 250 and 350, while the frequency of the atrial discharge pulse in patients with atrial fibrillation is between 350 and 600. It is recommended to consult a doctor for relevant examinations in time, and according to the specific situation, under the guidance of the doctor, carry out symptomatic treatment.