If the patient has chest tightness with breathlessness while sleeping at night, he or she must call 120 at first and go to the hospital quickly to avoid affecting and delaying the condition. In addition, the patient should be quickly placed in a seated position and treated with sublingual nitroglycerin, and if there are quick-acting heart pills or salvia pills at home, they can be taken at the same time. Patients with previous history of hypertension, coronary heart disease or cerebrovascular disease can be relieved and treated with appropriate symptomatic medication according to their previous condition.