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Influencing factor analysis on the diagnostic results of neurally mediated syncope by headup tilt table test |
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Abstract Objective To investigate the influence of age, gender and body mass index(BMI) on the diagnostic results of neurally mediated syncope(NMS) by head-up tilt table test(HUTT). Methods A total of 189 suspected NMS patients were enrolled in our study who had consulted in our department from July 2015 to July 2017. All patients were performed HUTT, which comprised of a 20minute basic head-up tilt table test(BHUT) and a 20minute sublingual nitroglycerin headup tilt table test(SNHUT). The changes of blood pressure and heart rate were synchronously monitored on all the patients during HUTT. According to hemodynamic changes, the HUTT positive results were classified into vasodepressor type, cardioinhibitory type and mixed type.The patients with syncope were divided into three groups: ≤30 years old , 31-50 years old and ≥50 years old.ResultsAmong 189 NMS patients,125 cases(55 males and 70 females) had positive reactions to HUTT while 64 had negative reactions. The positive rate was 66.1%. In the positive reactions, 81 patients(64.8%)were of mixed type, 14(11.2%)were of cardioinhibitory type, and 30(24.0%) were of vasodepressor type.The positive rate of females aged 31-50 was significantly higher than that of males, and the difference was statistically significant(75.7% vs. 51.6%, P=0.039). The positive rate did not vary significantly between males and females in other age groups. The hemodynamic typing of HUTT positive reaction got rid of the influence of age or gender. HUTT positive patients had lighter body weight than negative ones with statistically significant difference(P=0.047). The differences of height and BMI between the two groups were not statistically significant(P>0.05).There was no correlation between the reaction type of HUTT,and the height, body weight and BMI of the patients(P>0.05).Conclusion The positive rate of NMS by HUTT varies with age, gender and body weight.
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HE Wen-Yi, DENG Guo-Lan. [J]. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2019, 28(5): 378-380. |
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