Paroxysmal atrial fibrillation is an irregular, intermittent fluttering of the atria that lasts for less than 2 days and occurs intermittently over a 7-day period, and disappears without treatment, with the heart rate returning to normal. When paroxysmal atrial fibrillation occurs, patients may feel dizziness, panic, chest tightness or difficulty breathing, weakness of the limbs, and a feeling of hard work. In atrial fibrillation, the heart rate is unstable and irregular, and it is extremely easy to develop blood clots, and the clots can be dislodged and form clots in the arteries of the brain or limbs with the blood flow, and heart failure may also occur. When paroxysmal atrial fibrillation signs indicate the presence of cardiovascular cardiovascular disease, it is necessary to go to the hospital for electrocardiogram, myocardial enzyme profile, coronary angiography and echocardiography to determine the cause of paroxysmal atrial fibrillation, which is clinically found to be caused by mitral valve lesions of the heart, systolic myocarditis and coronary heart disease.