Futterman L G, Lemberg L
Department of Medicine, University of Miami School of Medicine, Fla, USA.
Am J Crit Care. 2000 Jul;9(4):288-93.
Syncope may be a manifestation of many diseases. The etiology is often difficult to determine. Much effort, time, and expense have been required to determine a diagnosis. A thorough history and physical examination are essential (Table 3). Several clinical pearls may be of help in the diagnosis of syncope: (a) the most important elements in the evaluation of syncope are a detailed history and physical examination; (b) syncope is a common problem in young healthy adults and the elderly; (c) a heavy meal is a specific cause of syncopy in the elderly (postprandial), however this etiology often goes unrecognized; (d) syncope is caused by 1 of 3 mechanisms: decreased cardiac output, systemic vascular resistance, or cerebrovascular disease; (e) reflex-mediated syndromes (vasovagal) are common causes of syncope in young adults, and orthostatic hypotension is an important cause of syncope in the elderly; and (f) the 1-year mortality of cardiac syncope (18%-33%) is significantly higher than that from non-cardiac syncope (0%-12%). A proven and useful tool has recently been advanced to aid in the evaluation of syncope. The Reveal Plus insertable loop recorder has auto activation that allows automatic capture and recording of arrhythmic events. Patient activation is an option. The recorder lasts 12 to 14 months and has proven to be a valuable and reliable cost-effective asset in our quest to evaluate syncope.
晕厥可能是多种疾病的表现。其病因往往难以确定。确定诊断需要耗费大量精力、时间和费用。全面的病史采集和体格检查至关重要(表3)。在晕厥的诊断中,有几个临床要点可能会有所帮助:(a)评估晕厥时最重要的因素是详细的病史和体格检查;(b)晕厥在年轻健康成年人和老年人中都是常见问题;(c)饱餐是老年人晕厥(餐后)的一个特定原因,然而这种病因常常未被认识到;(d)晕厥由以下三种机制之一引起:心输出量减少、全身血管阻力降低或脑血管疾病;(e)反射介导的综合征(血管迷走性)是年轻成年人晕厥的常见原因,而体位性低血压是老年人晕厥的一个重要原因;(f)心源性晕厥的1年死亡率(18% - 33%)显著高于非心源性晕厥(0% - 12%)。最近有一种经过验证且有用的工具被用于辅助晕厥的评估。Reveal Plus植入式循环记录仪具有自动激活功能,可自动捕捉和记录心律失常事件。也可选择患者激活。该记录仪可持续使用12至14个月,在我们评估晕厥的过程中已被证明是一种有价值、可靠且具有成本效益的资产。