After brain death, the patient will not breathe at all. If the patient is not put on a ventilator in time to help the patient breathe, the patient’s heart will stop beating completely within a few minutes, and there will be no heartbeat and no breathing, and the organs in the body will not be able to live. In other words, if the patient is not put on a ventilator after brain death, the organs will only live for a few minutes. If the patient is put on a ventilator in time after brain death to maintain the patient’s breathing, the heart will still beat for a while, and the organs in the body will also live for a while. Statistics show that with the full help of a ventilator, the heart will stop beating in about 97% of brain-dead patients within a week. Similarly, even with the help of a ventilator, the organs of the vast majority of brain-dead patients do not survive for more than a week, and only a very small number of them do.