Positive-to-negative test provides rational and experimental evidence. Drinking-water is a simple and effective measure for the prevention of vasovagal syncope.
阳转阴试验为防治小儿血管迷走性晕厥提供了理论和实验依据，饮 水试验是一种简单有效可行的防治措施。
Objective:To evaluate the value of sublingual isosorbide dinitrate (ISDN) adminstration before tilt table test (TTT) as a simple practice test for diagnosis of vasovagal syncope(VVS).
目的：探讨直立倾斜试验（TTT）前舌下含服硝酸异山梨酯（ISDN）对诊断血管迷走性晕厥的价值。
Objective:To evaluate the value of sublingual isosorbide dinitrate (ISDN) adminstration before tilt table test (TTT) as a simple practice test for diagnosis of vasovagal syncope(VVS).
目的：探讨直立倾斜试验（TTT）前舌下含服硝酸异山梨酯（ISDN）对诊断血管迷走性晕厥的价值。
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