The differences between ventricular fibrillation and atrial fibrillation include: different sites of onset, different pathophysiologic processes, different symptoms, and different treatment modalities. 1. Different pathogenesis sites: Atrial fibrillation, known as atrial fibrillation, refers to abnormalities in the regular electrical activity of the atria, causing rapid and disorderly atrial fibrillation, with the onset of the disease mainly in the atria. Ventricular fibrillation, known as ventricular fibrillation, is a serious disorder of ventricular electrical activity, causing chaotic ventricular contraction, and its onset is mainly in the ventricle. 2. Pathophysiological process is different: the typical pathophysiological disorders in patients with atrial fibrillation include cardiac pumping hypoplasia, atrial appendage thrombosis and ventricular rate disorders, but many patients can compensate for the heart and do not have obvious symptoms. Ventricular fibrillation patients due to ventricular contraction weakness can not pump out enough blood, will soon produce low blood pressure, shock, loss of consciousness, fainting and other signs of circulatory failure, untreated can lead to sudden death. 3. Symptoms are different: patients with atrial fibrillation whose ventricular rate is not fast can have no obvious symptoms, and when the ventricular rate is greater than 150/minute, patients can have dyspnea, angina, coughing and other heart failure manifestations. Patients with ventricular fibrillation may have sudden loss of consciousness, fainting, convulsions, shock and even sudden death due to heart pump failure. 4. Different treatment modalities: The treatment of patients with atrial fibrillation mainly includes controlling the ventricular rate, preventing thromboembolism and resuming the sinus rate, which can be treated with medication or radiofrequency ablation. Ventricular fibrillation is a critical condition that can be fatal and requires immediate resuscitation, including cardiopulmonary resuscitation (CPR), defibrillation with electric shock, and artificial respiratory support. Further advanced life support is required after hospitalization. Seek medical attention as early as possible to avoid delaying the condition. Ventricular fibrillation should be immediately resuscitated on the spot while calling for 120.