晕厥(syncope)是一种突发的短暂性意识丧失,伴姿势紧张消失,不需要电或药物复律,持续数秒至数分钟自行恢复。约占住院病人的1％～6％,急诊室病人的3％。一项对30～62岁5209人随访13年的研究表明,3％男性和3.5％女性每年发生晕厥2次以上,且随年龄增长而增加。35～44岁者为0.7％,≥75岁者达5.6％。本文就晕厥的诊断思维作一介绍。 Syncope is a transient, transient loss of consciousness that disappears with tension, does not require electrical or drug cardioversion, and resumes for seconds to minutes. About 1% to 6% of hospitalized patients, 3% of emergency room patients. A study of 13-year follow-up of 5,209 people aged 30 to 62 years showed that 3% of men and 3.5% of women experienced syncope more than twice a year and increased with age. 0.7% of those 35-44 years old and 5.6% of those over 75 years of age. This article gives a synopsis of diagnostic thinking.