Guidance: Hello. Once young adults have signs of sudden death, the probability of being saved is lower than that of the elderly. Due to sudden death caused by myocardial ischemia, the elderly usually have ischemic symptoms due to the decline of physical function, and a collateral circulation system will be established in the body to help blood circulation, but young people are in good health at ordinary times. Once acute myocardial ischemia occurs, without this collateral circulation system, the disease will be fatal.