Objective It is considered that head-up tilt testing(HUT) is the most valuable method for diagnosis of vasovagal syncope. Because of many factors associated with tilt testing , there is no common and standard protocol .

• 目的：直立倾斜试验(head-up tilt testing，HUT)是诊断血管迷走性晕厥最有价值的方法，但因影响试验因素较多，国内外尚没有统一的标准的试验方案。