目的 探讨改良电极位置对心电图波形的影响,以获得更好的儿童心电监护电极位置。方法 采用缩短电极距离的改良电极位置以及传统电极位置分别测量50 例儿童的体表监护心电图,比较两种不同电极位置所获心电图P 波、QRS 波振幅的差异,以及改良电极位置后,患者体位变化对P 波、QRS 波振幅的影响。结果 改良电极位置以及传统电极位置两种方式测量的心电图P波、QRS 波振幅差异无统计学意义(P>0.05);改良电极位置后,患者体位变化对P 波、QRS 波振幅的影响亦无统计学意义(P>0.05)。结论 改良电极位置可获得理想的体表监护心电图,而且不受体位影响,提示在儿童改良电极位置可以替代传统电极位置进行体表心电图监测。

Objective This study examines the impacts of an improved electrode placement on the electrocardiogram (ECG) results in order to determine a better electrode placement for ECG monitoring in children.Methods ECG was recorded using the traditional electrode placement and the modified electrode placement (with shortened electrode distance) respectively in 50 pediatric patients. The amplitudes of P wave and QRS wave on ECG by the two measurements were compared. Furthermore, the impacts of different body positions on the amplitudes of P wave and QRS wave were studied after applying the modified electrode placement.Results There were no significant differences in the amplitudes of P wave and QRS wave on ECG by the traditional electrode placement and the modified electrode placement (P>0.05). When modified electrode placement was utilized, the body position change did not lead to significant changes in the amplitudes of P wave and QRS wave (P>0.05).Conclusions A satisfactory ECG can be obtained with the modified electrode placement independent of patient's body position, suggesting that the modified electrode placement can be used instead of the traditional placement in children.