目的：探讨倾斜试验和硝酸异山梨醇酯舌下含化倾斜试验在不明原因晕厥诊断中的价值。

Objective: To evaluate sublingual isosorbide dinitrate before tilt test in the diagnosis of unexplained syncope.

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方法80例不明原因晕厥患者为病人组，47例无晕厥病史的健康人作为对照组均采用此试验，包括基础倾斜试验和异丙肾倾斜试验。

Method 80 patients with unexplained syncope and 47 healthy controls were tested, including basic tilt table test and isoproterenol tilt table test.

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心源性晕厥患者的晕厥复发率为7.0%，明显低于不明原因晕厥患者复发率20.4%（P<0.01）；

The recurrence rate of cardiogenic syncope was significantly lower than that of unknown syncope(7.0% vs 20.4%, P< 0.01).

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心源性晕厥患者的晕厥复发率为7.0%，明显低于不明原因晕厥患者复发率20.4%（P<0.01）；

The recurrence rate of cardiogenic syncope was significantly lower than that of unknown syncope(7.0% vs 20.4%, P< 0.01).

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