晕厥诊断及辨别诊断评价(国外英文资料).docVIP

晕厥诊断及鉴别诊断评价 Syncope diagnosis and differential diagnosis evaluation Lu yining 1 (review) liu yanping 2 (review) (1. The fourth peoples hospital in baotou, Inner Mongolia.) Syncope is a sudden loss of consciousness and then rapid recovery, accompanied by a disorder of physical tension. The pathogenesis of syncope is caused by a lack of cerebral perfusion in the brain. The brain perfusion depends on the systemic arterial pressure and cardiac output and peripheral vascular resistance is the determinants of systemic arterial pressure, therefore, any impact on cardiac output and peripheral vascular resistance factors all can reduce brain perfusion then cause syncope [1]. Syncope: About 500,000 new cases of syncope are reported annually. Three to five percent of the patients in the emergency room were diagnosed with syncope, and 1 percent to 6 percent of hospitalized patients were diagnosed with syncope. Since the cause is not clear, 25 to 50 percent of syncope patients are not diagnosed. If you classify syncope as a cause, you should first understand the effect of heart disease on syncope. Heart disease is the most severe and common cause of syncope (see table 1). The most common causes of syncope are neurogenic syncope and vasovagal syncope. These two diseases are caused by the autonomic neurological dysfunction that leads to blood vessel tension and abnormal heart rhythms. Although the primary lesion of neurogenic syncope is a nervous system, it is caused by heart disease (such as arrhythmia, postural hypotension). Epilepsy is a disease that is often misdiagnosed as syncope, which accounts for 5 to 15 percent of episodes. The identification of syncope and epilepsy is that the latter duration of the latter episode lasts longer, and this trait is less common in syncope. After the onset of syncope, a rapid recovery is usually followed by an unconsciousness disorder. A prospective study showed that neurogenic syncope accounted for 58 percent of all syncope. About 23 perce