No matter what the cause of angina, regardless of what symptoms appear with angina, with or without arrhythmia, the first thing is to let the patient relax, calm down, slowly sit down and rest, to avoid all triggers that cause angina, slowly the pain symptoms can be relieved. At the same time, sublingual nitroglycerin and quick-acting heart pills should be administered. Perform electrocardiogram, 24-hour ambulatory electrocardiogram, and exercise stress test to observe the cause of arrhythmia, the type of arrhythmia, whether it is sinus arrhythmia or arrhythmia caused by premature beats, and observe whether there is atrioventricular block and ventricular rate irregularity caused by missed beats, and give reasonable treatment according to the specific condition.