Sudden death from coronary artery disease is common in the following cases: first, malignant arrhythmia, sudden onset of panic, chest tightness, dyspnea, and if an ECG is done considering frequent premature beats, there may also be ventricular arrhythmias, which can cause sudden death if not detected in time. Second, large myocardial infarction, the patient can have sudden chest tightness, chest pain, dyspnea and other symptoms thus leading to syncope, respiratory and circulatory arrest and other risks. Third, heart failure, with sudden onset of heavy sweating, chest tightness, and dyspnea, can also lead to death if not treated in time.