Atrial fibrillation, short for atrial fibrillation, is one of the most common cardiac arrhythmias. Patients with paroxysmal atrial fibrillation may experience symptoms such as panic attacks, palpitations, dyspnea, chest tightness, or fatigue when atrial fibrillation occurs, and dizziness, blackouts, or even fainting may occur when combined with long intervals. Some patients are not sensitive to subjective symptoms, or atrial fibrillation lasts for a long time, or there may be no obvious symptoms. Symptoms of atrial fibrillation mainly depend on a variety of factors, such as ventricular rate at the time of the attack, cardiac function, concomitant diseases, duration of atrial fibrillation, and the patient’s sensitivity to perceive the symptoms. If you have these symptoms, you should go to a regular hospital for examination and treatment as prescribed by the doctor. In addition, you should quit smoking and drinking, and avoid caffeine-containing substances such as coffee, tea, cola, and over-the-counter medications.