背景长-QT综合征（LQTS）是一种潜在的致命性心脏的离子通道病，容易被误认为是心悸，神经心源性晕厥或者癫痫。
Background— Long-QT syndrome (LQTS) is a potentially lethal cardiac channelopathy that can be mistaken for palpitations, neurocardiogenic syncope, and epilepsy.
在排除心律失常或器质性心脏病并怀疑有神经心源性晕厥时，就需要进行倾斜试验，以对不明因复发性晕厥作出诊断。
Tilt table testing is indicated for unexplained, recurrent syncope when arrhythmia or organic heart disease is excluded and neurocardiogenic syncope is suspected.
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