P wave dispersion on 12-lead electrocardiography in adolescents with neurocardiogenic syncope.
10.3345/kjp.2016.59.11.451
- Author:
Dong Hyuk LEE
1
;
Kyung Min LEE
;
Jung Min YOON
;
Jae Woo LIM
;
Kyung Ok KHO
;
Hong Ryang KIL
;
Eun Jung CHEON
Author Information
1. Department of Pediatrics, Konyang University College of Medicine, Daejeon, Korea. ejcheon000@kyuh.ac.kr
- Publication Type:Original Article
- Keywords:
P wave dispersion;
Neurocardiogenic syncope;
Autonomic dysregulation
- MeSH:
Adolescent*;
Child;
Echocardiography;
Electrocardiography*;
Female;
Humans;
Syncope;
Syncope, Vasovagal*
- From:Korean Journal of Pediatrics
2016;59(11):451-455
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: Neurocardiogenic syncope (NCS) is the most frequent cause of fainting during adolescence. Inappropriate cardiovascular autonomic control may be responsible for this clinical event. The head-up tilt test has been considered a diagnostic standard, but it is cumbersome and has a high false-positive rate. We performed a study to evaluate whether P-wave dispersion (PWD) could be a useful electrocardiographic parameter of cardiac autonomic dysfunction in children with NCS. METHODS: Fifty-four patients with NCS (28 boys and 26 girls; mean age, 12.3±1.4 years) and 55 age- and sex-matched healthy controls were enrolled. PWD was obtained as the difference between maximum and minimum durations of the P wave on standard 12-lead electrocardiography in all patients and controls RESULTS: The value of PWD was significantly higher in the syncope group than in the control group (69.7±19.6 msec vs. 45.5±17.1 msec, respectively; P<0.001). The minimum duration of P wave was shorter in the syncope group than in the control group (43.8±16.8 msec vs. 53.5±10.7 msec, respectively; P<0.001). Left atrial volume was not different between the groups on transthoracic echocardiography. CONCLUSION: PWD on echocardiography could be used as a clinical parameter in patients with NCS.
