[Frequency domain analysis of signal-averaged electrocardiogram in patients with right bundle branch block following repair of congenital heart disease].
Frequency domain analysis of signal-averaged electrocardiograms (SAECGs) were investigated in 24 patients with right bundle branch block (RBBB) following repair of congenital heart disease, in order to determine the block site of RBBB using a SAECG. The block site of RBBB was first identified by a body surface map; 10 patients had proximal RBBB, 14 had distal RBBB. The peak amplitude, the amplitudes on 20 Hz, 40 Hz, 50 Hz, and 100 Hz in the proximal RBBB patients were significantly (p < 0.01) smaller than in the distal RBBB patients. The areas between 0 to 20 Hz, between 0 to 40 Hz, between 20 to 50 Hz, between 40 to 100 Hz in the proximal RBBB patients were significantly (p < 0.01) smaller than in the distal RBBB patients. In conclusion, frequency domain analysis of SAECG was useful for determining the block site of RBBB following surgical correction.
Akita
H
H
Department of Pediatrics, University of Tokushima, School of Medicine.
Matsuoka
S
S
Kubo
M
M
Hayabuchi
Y
Y
Kuroda
Y
Y
D000293:Adolescent; D000328:Adult; D002037:Bundle-Branch Block / Q000209:etiology / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006345:Heart Septal Defects, Ventricular / Q000601:surgery*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D013771:Tetralogy of Fallot / Q000601:surgery*