Krahn Andrew D, Klein George J, Yee Raymond, Skanes Allan C
Division of Cardiology, University of Western Ontario, London (ON), Canada,
Clin Auton Res. 2004 Oct;14 Suppl 1:55-61. doi: 10.1007/s10286-004-1008-y.
Syncope is a complex clinical syndrome with multiple etiologies that can be very difficult to diagnose. The major obstacles to diagnosis are the periodic and unpredictable nature of events and the high spontaneous remission rate. Short-term electrocardiographic monitoring is often unproductive in patients when initial non-invasive testing is negative, particularly when a paroxysmal arrhythmia is suspected. The external and implantable loop recorders extend the ability to monitor cardiac patients, enhancing the diagnostic yield to as high as 85% in difficult to diagnose syncope. Several recent studies suggest that prolonged monitoring with an implantable loop recorder has a role in patients with syncope and conduction disturbances, negative tilt testing, unexplained seizures and may be superior to conventional testing with tilt and electrophysiologic studies in selected patients.
晕厥是一种病因多样的复杂临床综合征，诊断起来可能非常困难。诊断的主要障碍是事件的周期性和不可预测性以及高自发缓解率。当初始非侵入性检查为阴性时，短期心电图监测对患者往往没有效果，尤其是怀疑阵发性心律失常时。外置式和植入式循环记录仪扩展了对心脏病患者的监测能力，在难以诊断的晕厥中，将诊断率提高到了85%。最近的几项研究表明，植入式循环记录仪的长期监测在晕厥和传导障碍、倾斜试验阴性、不明原因癫痫患者中发挥作用，并且在某些患者中可能优于传统的倾斜试验和电生理检查。
