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| Study on normal reference range of electrocardiogram in healthy neonates |
| LI Juan, LI Xiaomin, ZHANG Wei, HU Shuang, ZHANG Yanmin |
Department of Function, Northwest Women and Children??s Hospital,
Xi’an Shaanxi 710061 |
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Abstract Objective To establish the normal reference range of electrocardiogram (ECG) in healthy neonates with different sexes. Methods We recorded and measured routine 12-lead synchronous ECGs of 906 healthy neonates (including 474 males and 432 females), and made statistical analysis of the collected data. We obtained the normal reference ranges of the related ECG indexes (including heart rate, mean QRS axis, P-wave duration, PR interval, P-wave amplitude, QRS duration, QRS amplitude, QTc, T-wave amplitude, etc.), and the morphologies of P-wave, QRS complex and T-wave in the neonates with different sexes. Results There are significant differences of P-wave amplitude in leads Ⅰ,Ⅱ, aVL, aVR, V2 and V4-V6, QRS duration in leads Ⅰ,Ⅱ,Ⅲ, aVR, aVL, aVF, V1 and V3-V6, QRS amplitude in leads Ⅲ, aVR, aVF and V1-V4, T-wave amplitude in leads aVR, aVL and V4-V6, QRS complex morphology in leads Ⅰ,Ⅱ, aVR, aVF, V1 and V3-V6, and T-wave morphology in leads Ⅰ, aVL and V6 between the male and female neonates (P<0.05). Conclusion The normal reference ranges of ECG indexes recorded by 12lead synchronous ECGs in healthy neonates are different between the sexes.
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