Recording of the electrocardiogram from the sinus node and direct measurement of the sinuatrial conduction time in children.
Using a simple technique, the electrocardiogram from the sinus node, which had been previously recorded in adults, was for the first time derived successfully in 27 of 31 children (87%). The values of the sinuatrial conduction time were then precisely measured directly according to the electrocardiogram from the sinus node. The sinuatrial conduction time measured directly was significantly longer in 6 children with sick sinus syndrome (138.3 +/- 10.3 msec, mean +/- standard deviation) than in 21 normal children (66.9 +/- 14.4 msec, mean +/- standard deviation). No overlap was found between them. Furthermore, comparison was made between the children and the adults (7 cases with sick sinus syndrome, 32 cases with normal sinus nodal function). The results suggested that the electrocardiogram recorded from the sinus node may be a valuable and promising technique for the evaluation of sinus nodal function and in the accurate diagnosis of the sick sinus syndrome in children.
Zhang
D L
DL
Ningxia Medical College, Yinchuan, People's Republic of China.
Chen
S L
SL
Xi
Y A
YA
Zhou
X N
XN
D000293:Adolescent; D006328:Cardiac Catheterization; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography / Q000379:methods*; D004566:Electrodes; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D012804:Sick Sinus Syndrome / Q000175:diagnosis / Q000503:physiopathology; D012849:Sinoatrial Node / Q000502:physiology* / Q000503:physiopathology