Pre-terminal symptoms of heart and lung failure include difficulty or even cessation of breathing, cardiac arrest, dilated pupils, and unconsciousness. Cardiopulmonary failure is respiratory and circulatory failure, and terminal symptoms include symptoms of both heart failure and respiratory failure. Pre-terminal symptoms are mainly due to poor respiratory function and insufficient oxygen supply to the tissues resulting in severe hypoxia, which leads to respiratory and cardiac arrest, dilated pupils, coma and other end-of-life manifestations. If you find the above symptoms should be timely intervention, such as not in the hospital as soon as possible to call 120, in the hospital patients will have medical personnel as soon as possible to give rescue, timely cardiopulmonary resuscitation, to correct the acid-base balance disorders, medications and instruments to correct the ischemic and hypoxic state.