Hyperuricemia in an infant with Taussig-Bing anomaly and interruption of the aortic arch

Signal-averaged electrocardiograms (SAECGs) were recorded with bipolar orthogonal and standard 12-lead settings in 29 term healthy newborn infants. SAECGs performed with the two lead configurations were similar in quality and quantity. For the duration of the QRS complex (QRSD), the upper limit of normality for newborn infants can be set to 100 ms. It is similar in individual bipolar orthogonal and individual standard 12-lead recordings as well as in filtered QRSD in the vectorcardiograms (the vector magnitude, VM, and the sum of extremity leads). In individual leads of bipolar orthogonal and standard 12-lead recordings, root-mean-square voltage of the terminal 40 ms of the QRS complex (RMS40) is widely scattered and unsuitable as discriminant variable. For VM and the sum of the extremity leads, the same reference values for RMS40 and duration of low-amplitude signal can be used as applied in adults. Individual lead recordings provide complementary information in addition to vectorcardiograms. There are practical advantages using standard 12-lead compared to conventional bipolar orthogonal configurations. The widespread use of standard 12-lead ECG in routine medical practice makes its utility advantageous also in performing signal-averaged electrocardiography.

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Signal-Averaged Electrocardiography in Normal Newborn infants

Bennhagen

Sörnmo

Pahlm

et al. 2004

Pediatr Cardiol

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Signal-Averaged Electrocardiogram May Be a Beneficial Prognostic Procedure in the Postoperative Follow-Up Tetralogy of Fallot Patients to Determine the Risk of Ventricular Arrhythmias

2007

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Early detection of arrhythmias after congenital heart disease surgery is important because it can help decrease morbidity and mortality. Standard electrocardiograms (ECGs) contain frequencies between 0.05 and 100 Hz, but higher frequencies are also present. Using high-resolution technology, the highest amplitudes of these high-frequency components within the QRS complex can be recorded and analyzed. We studied the relationship between ventricular late potentials, ventricular arrhythmias and right ventricular systolic pressure in 22 patients who underwent tetralogy of Fallot repair (mean follow-up, 40.1 +/- 33.5 months). Holter ECG monitoring and signal-averaged electrocardiograms (SAECGs) were performed. SAECG parameters studied included the duration of the filtered QRS, the duration of terminal QRS below 40 muV, and the root mean square amplitude of the terminal 40 msec. Cardiac catheterization was performed on 19 patients. Eighteen healthy volunteers were studied as a control. Ventricular arrhythmias were found in 13 patients; right ventricular systolic hypertension was found in 1 patient. No significant residual ventricular septal defects were detected. Eight patients had ventricular late potentials. Right ventricular systolic pressure did not differ significantly between patients with or without late potentials. There were significant differences between patients with ventricular arrhythmias and healthy volunteers; filtered QRS duration was significantly longer in patients with ventricular arrhythmias. SAECG may be beneficial in determining ventricular arrhythmia risk in tetralogy of Fallot patients postoperatively.

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Abnormal serum uric acid levels in children

Wilcox

1996

The Journal of Pediatrics

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Hyperuricemia in an infant with Taussig-Bing anomaly and interruption of the aortic arch

Cited by 9 publications

References 9 publications

Signal-Averaged Electrocardiography in Normal Newborn infants

Signal-Averaged Electrocardiography in Normal Newborn infants

Signal-Averaged Electrocardiogram May Be a Beneficial Prognostic Procedure in the Postoperative Follow-Up Tetralogy of Fallot Patients to Determine the Risk of Ventricular Arrhythmias

Abnormal serum uric acid levels in children

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