晕厥是神经科常见的症状,是由于脑血流骤减引起的突发意识障碍,同时伴有自主神经的症状如出冷汗、心悸、腹胀、呼吸不畅、便意等表现。晕厥发作时间一般很短,数秒或数10秒就可恢复意识。极少数发作时间长的,还会伴有四肢抽搐的症状。年轻人和老年人都可以发 Syncope is a common neurological symptoms, sudden loss of consciousness due to sudden decline in cerebral blood flow, accompanied by symptoms of autonomic nervous symptoms such as cold sweats, heart palpitations, bloating, poor breathing, meaning and so on. Syncope time is usually very short, seconds or seconds to restore consciousness. A very small number of seizures for a long time, but also accompanied by limbs twitch symptoms. Both young and old can do it