Sudden death can occur during sleep, mainly related to the patient’s underlying disease. If one has a heart problem, plus whether one has microvascular lesions caused by hypertension or diabetes, one is prone to sudden death in sleep in a particularly stressful state, such as when drinking a lot of alcohol or being fatigued. Some people are related to genetic factors, others are also related to syncope. How did one patient die suddenly? He had syncope a day or two before his sudden death, but he didn’t pay attention to it and didn’t pay attention to it. In fact, the syncope was due to myocardial ischemia of the heart, which was not seen in time and resulted in sudden death during sleep the next day. So (sudden death in sleep) is related to many factors before sudden death.