Coenzyme q10 does not induce atrial fibrillation. Coenzyme Q10 nourishes the myocardium, prevents atherosclerosis, and also powers the heart and does not affect cardiac function. It is possible for patients with atrial fibrillation to take coenzyme Q10 if they want to, but it neither controls the ventricular rate of atrial fibrillation nor prevents embolic complications. Therefore, coenzyme Q10 in patients with atrial fibrillation is not very useful, even though it is not harmful. The main treatments for atrial fibrillation are medication and surgery. Pharmacological treatment is mainly the use of digitalis or beta-blockers to control the ventricular rate of patients with atrial fibrillation, and oral anticoagulants are needed to prevent intra-atrial thrombosis and the occurrence of embolic complications. Surgical treatment is mainly radiofrequency ablation. If a patient is diagnosed with atrial fibrillation, he or she should seek medical attention in a timely manner and be treated with medication or surgery under the guidance of a physician.