There are not necessarily 8 manifestations of precursors of heart attack. Common manifestations include fatigue, chest discomfort, palpitations on activity, shortness of breath, irritability, chest pain and ECG abnormalities. Most of the patients have fatigue, chest tightness, palpitation, dyspnea, irritability and other precursor symptoms before the onset of the disease, especially new-onset angina or aggravation of the primary angina, angina attacks are more frequent than before, more intense in nature, and have a long duration of development, the effect of sublingual nitroglycerin is poor, and the role of predisposing influencing factors is not obvious. The electrocardiogram shows ST-segment elevation or lowering and T-wave inversion or elevation, i.e., unstable angina pectoris. Timely detection and management of acute myocardial infarction aura can prevent acute myocardial infarction in some patients. If the corresponding symptoms exist, it is recommended to consult the doctor as soon as possible to avoid delaying the condition.