关键词: 血管迷走性晕厥, 反复晕厥, 倾斜台试验, 儿童, 诊断

Abstract: AbstractObjectiveTo probe prediction of recurrent syncope in children with vasovagal syncope (VVS) through headup tilt table test (HUTT).MethodsThere were 251 (male 112 and female 139) patients with unexplained syncope (UPS) aged from 4 to 18 (12.25±3.27) years old who came from syncope department and hospitalization of the Second Xiangya Hospital of Central South University and they were made basic headup tilt table test (BHUT,n=251) with power tilt table.Negative cases of BHUT were given written informed consent and then given sublingual glyceryl trinitrate 0.2mg and made sublingual nitroglycerin headup tilt table test (SNHUT,n=92).The patients were divided into three groups: A group (n=54,syncope episode only 1 time) and B group (n=137,syncope episode were 2 to 4 times)and C group (n=60,syncope episode≥5 times).These data were statistically analyzed by computer with SPSS 11.0 software.Results(1)The relationship between the positive rate of HUTT and the syncope frequency:the positive rate of BHUT was increasing with the increase of syncope frequency (χ2=4.285,P>0.05),while the positive rate of SNHUT has no linear relation with the increase of syncope frequency (χ2=1.316,P>0.05),and it was also increasing with the increase of syncope frequency about the total positive rate of HUTT (BHUT + SNHUT) in different groups(χ 2=3.809,P>0.05).(2)The relationship between the reaction type and the syncope frequency: the reaction type was mainly vasoinhibition both in BHUT and SNHUT；there was no significant difference among different syncope frequency groups inBHUT(χ 2=3.008,P>0.05) and in SNHUT(χ2=2.426,P>0.05).ConclusionThere is no relationship between HUTT and recurrent syncope episodes.The positive rate of HUTT cannot predict recurrent syncope episodes in children with VVS.

Key words: Children, Diagnosis , Recurrent syncope, Headup tilt table test(HUTT)