Key result
Synthesized vectorcardiogram normal values for spatial QRS-T angle and ventricular gradient were established using electrocardiograms from 1263 healthy subjects aged 0 to 24 years.
Why the study?
What are the normal values of the synthesized vectorcardiogram (spatial QRS-T angle and ventricular gradient) in pediatric subjects?
Observational (n=1,263)
What are the normal values of the synthesized vectorcardiogram (spatial QRS-T angle and ventricular gradient) in pediatric subjects?
This study establishes normal reference values for the pediatric synthesized vectorcardiogram, providing a foundation for future risk stratification in pediatric heart disease.
Answers are grounded in this paper and cite their sources.
Provides pediatric reference values for spatial QRS-T angle; leaves open their utility for risk stratification pending validation.
BACKGROUND: Normal values of the mathematically-synthesized vectorcardiogram (VCG) are lacking for children. Therefore, the objective of this study was to assess normal values of the pediatric synthesized VCG (spatial QRS-T angle [SA] and ventricular gradient [VG]). METHODS: Electrocardiograms (ECGs) of 1263 subjects (0-24 years) with a normal heart were retrospectively selected. VCGs were synthesized by the Kors matrix. Normal values (presented as 2nd and 98th percentiles) were assessed by quantile regression with smoothing by splines. RESULTS: Our results show that heart rate decreased over age, QRS duration increased and QTc interval remained constant. The SA initially decreased and increased again from the age of 8 years. The VG magnitude was relatively stable until the age of 2 years, after which it increased. CONCLUSION: Normal values of the pediatric ECG and VCG (VG and SA) were established. These normal values could be important for future studies using VG and SA for risk stratification in heart disease in children.
No takes yet. Share an insight, caveat, or question.
Kamphuis et al. (2018) conducted an observational in Normal heart (n=1,263). Synthesized vectorcardiogram (VCG) was evaluated on Normal values of the pediatric synthesized VCG (spatial QRS-T angle [SA] and ventricular gradient [VG]). Synthesized vectorcardiogram normal values for spatial QRS-T angle and ventricular gradient were established using electrocardiograms from 1263 healthy subjects aged 0 to 24 years.
Synapse has enriched 10 related papers. Consider them for comparative context: