Changes in ventricular late potentials in children and adolescents with postural tachycardia syndrome
10.3760/cma.j.issn.2095-428X.2019.23.010
- VernacularTitle: 儿童青少年体位性心动过速综合征心室晚电位的变化
- Author:
Ying CHEN
1
;
Xiuying YI
2
;
Qing JI
2
;
Yuwen WANG
3
;
Cheng WANG
3
Author Information
1. Department of Pediatric Cardiovasology, Children′s Medical Center, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China; Department of Pediatrics, Zhuzhou Hospital Affiliated to Xiangya Medical College, Central South University, Zhuzhou 412000, Hunan Province, China
2. Department of Pediatrics, Zhuzhou Hospital Affiliated to Xiangya Medical College, Central South University, Zhuzhou 412000, Hunan Province, China
3. Department of Pediatric Cardiovasology, Children′s Medical Center, the Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China
- Publication Type:Journal Article
- Keywords:
Postural tachycardia syndrome;
Ventricular late potential;
Child;
Adolescent;
Head-up tilt test
- From:
Chinese Journal of Applied Clinical Pediatrics
2019;34(23):1799-1802
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the changes in ventricular late potentials (VLP) in children and adolescents with postural tachycardia syndrome (POTS).
Methods:One hundred and forty-four children and adolescents diagnosed as POTS by using the head-up tilt test (HUTT) in Second Xiangya Hospital of Central South University from January 2012 to March 2019 were selected as POTS group, their age ranged 4 to 16 years old[(11.03±2.34)years old], there were 65 boys and 79 girls.Ninety-one healthy children and adolescents matched by age and gender[aged 4-16 (11.22±1.68) years old, there were 50 boys and 41 girls]were selected as the healthy control group.VLP was measured by SR-1000A ECG automatic analyzer (Boai, Guangdong, China).
Results:Compared with the healthy control group, the prevalence of positive VLP in the POTS group increased [ 11.1%(16/144 cases)vs.1.1%(1/91cases)], and the difference was statistically significant(χ2= 6.904, P<0.01); the heart rate in the POTS group increased compared with that in the healthy control group[82.0 (74.0-95.0) times/min vs.78.0 (71.0-86.0) times/min], and the difference was statistically significant(Z=-2.265, P<0.05); the low-amplitude signal(LAS40) in the POTS group prolonged compared with that in the healthy control group[23.0 (17.0-31.0) μV vs.19.0 (13.0-25.0) μV], and the difference was statistically significant(Z=-4.114, P<0.01); root mean square amplitude(RMS40) increased compared with that in the healthy control group[61.3 (34.4-79.1) ms vs.52.0 (38.8-64.5) ms], and the difference was statistically significant (Z=-2.469, P<0.05). There was no statistically significant difference in total QRS time (TQRS) between 2 groups [86.0 (76.0-97.5) ms vs.87.0 (81.0-94.0) ms, Z=-0.007, P>0.05].
Conclusions:The positive rate of VLP is increased of children and adolescents with POTS.It suggests that there is an abnormal cardiac electrical activity in children and adolescents with POTS.
