COMPARE STUDY BOTH P WAVE DISPERSION AND QT INTERVAL DISPERSION OF
PREEXCITATION SYNDROME IN CHILDREN
Wang C, Xie Z-W, Cao M-J, Li M-X, Xu Y，Lin P
Department of Cardiovascular Pediatrics, 2nd
Affiliated Hospital of XiangYa Medical College of Central Southern
University, Changsha, Hunan, China
Objective: To probe the change
both P wave dispersion and QT interval dispersion of preexcitation syndrome
in children.
Methods: 12-lead simultaneous body surface electrocardiogram data were taken
from 32 patients of preexcitation syndrome age 2.42 to 16 years (mean 9.70±3.00 years) (research group) and 32 mate healthy children
aged 3 to 14 years (mean 9.67±2.75 years) (control group) with SR-1000A
automated electrocardiograph made by Guangdong Zhongshan of China. These
data were saved in the floppy disk with expert analysed the replayed
electrocardiogram on the screen.
The amplitude was magnified 1mV=20/40mm and paper speed was
increased to 50/100mm/s. Pmax, Pmin, QTmax
and QTmin were automated tested by artificial intervene and
calculated as Pd (Pmax-Pmin) and QTd
(QTmax-QTmin) and corrected by Bazett's formula as Pcd
(Pcmax-Pcmin) and QTcd (QTcmax-QTcmin).
Results: In research group Pmax, Pmin,
Pd, Pcmax, Pcmin and Pcd wear
not be prolonged (P>0.05) and QTmax, QTmin, QTd,
QTcmax, QTcmin and QTcd wear extended
(P<0.01) compare to the control.
Conclusions: Atrioventricular reentrant tachycardia of preexcitation syndrome
in children. is associated with ont only atrioventricular
reentrant loop but also electrical excitation sequence of ventricular
muscle. Atrial muscle is not appearance to participate in reentrant
electrical activity.