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KMID : 1130320160590110451
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Korean Journal of Pediatrics
2016 Volume.59 No. 11 p.451 ~ p.455
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P wave dispersion on 12-lead electrocardiography in adolescents with neurocardiogenic syncope
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Lee Dong-Hyuk
Lee Kyung-Min
Yoon Jung-Min
Lim Jae-Woo
Kho Kyung-Ok
Kil Hong-Ryang
Cheon Eun-Jung
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Abstract
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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.
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KEYWORD
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P wave dispersion, Neurocardiogenic syncope, Autonomic dysregulation
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