Elderly people fainted and then wake up on their own, considering the syncope attack, the causes of syncope attack mainly consider the following aspects: First, it may be vasovagal syncope, or situational syncope, carotid sinus syncope, which can lead to the patient in the heart rate slows down based on the blood pressure to further reduce, resulting in the cerebral blood supply of the transitory insufficiency, which caused the emergence of reflexive syncope. The second aspect is that it may be caused by insufficient blood volume, for example, the patient is in diarrhea, nausea, vomiting, poor eating and other conditions, which triggers the insufficiency of blood volume. The third aspect, which is also a more important cause of syncope, is to consider cardiac syncope, such as syncope due to arrhythmia, bradycardia, abnormal function of sinus node, tachycardia, supraventricular tachycardia, or syncope due to organic cardiovascular diseases, such as cardiac valvulopathies, pericardial disease, and so on.