If a patient has sudden tachycardia with dyspnea, first advise the patient to remain calm, avoid strenuous exercise, and have the patient sit in a sedated position with legs hanging down. If you have nitroglycerin or quick-acting heart pills at home, give them under the tongue quickly, and if you have other nitrate drugs at home, such as isosorbide mononitrate, you can also swallow them as soon as possible. At the same time, you can also take oral medications such as anti-platelet aggregation drugs, such as aspirin, clopidogrel, tegretol, etc. You can also take statin-type lipid-lowering drugs, such as atorvastatin calcium tablets and rasulvastatin calcium tablets. And quickly call 120 for help, let the professional doctor come to the patient’s home with a defibrillator, if there are oxygen absorbing devices at home, such as oxygen bags, oxygen bottles, etc., the patient should be given oxygen therapy quickly.