Characteristics of Deceleration Capacity and Heart Rate Variability in Patients With Vasovagal Syncope
10.3969/j.issn.1000-3614.2015.11.009
- VernacularTitle:血管迷走性晕厥患者的心率减速力和心率变异性特征
- Author:
Wei SUN
;
Lihui ZHENG
;
Yan YAO
;
Zhiyuan WENG
;
Yu QIAO
;
Bingbo HOU
;
Lingmin WU
;
Jinrui GUO
;
Shu ZHANG
- Publication Type:Journal Article
- Keywords:
Vasovagal syncope;
Parasympathetic nerve;
Deceleration capacity;
Heart rate variability
- From:
Chinese Circulation Journal
2015;(11):1067-1070
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To quantitatively evaluate the abnormal tense of parasympathetic nerve via measuring the heart rate deceleration capacity (DC) and heart rate variability (HRV) in patients with vasovagal syncope (VVS).
Methods: Our research included 2 groups: VVS group,n=28 patients with positive head-up tilt test treated in our hospital from 2013-06 to 2014-08 and Control group,n=30 patients without cardiovascular disorders. The DC and HRV were examined and compared between 2 groups.
Results:① The overall deceleration capacity (ODC) (9.4 ± 2.9) ms and daytime deceleration capacity (DDC) (8.9 ± 2.9) ms in VVS group were higher than those in Control group (7.5 ± 2.5) ms and (7.5 ± 2.5) ms respectively,P<0.05.② More patients in VVS group presented daytime-to-nighttime deceleration capacity ratio (DNratio) >1 than those in Control group (9/28, 32.1% vs 2/30, 6.7%),P=0.019.③ The SDNN (139.8 ± 34.0) ms, SDSD (29.9 ± 15.7) ms and rMSSD (40.9 ± 18.8) ms in VVS group were higher than those in Control group, (115.5 ± 29.4) ms, (21.8 ± 6.6) ms and (28.9 ± 8.4) ms respectively,P<0.05.④ Multivariate Logistic regression analysis indicated that ODC was positively related to vasovagal syncope occurrence (OR=2.045, 95% CI: 1.100-3.801,P=0.024).
Conclusion: VVS patients have abnormally increased indexes of DC and HRV, HDC is the predictor for vasovagal syncope occurrence.
