不同参比点豚鼠体表心电图的比较

目的 比较不同参比点豚鼠体表的心电图。方法 取30只成年豚鼠，分别以中心电端和右前额为参比点，同步记录豚鼠第1、4、7肋间隙环胸3圈18个点的心电图。比较相同测试点中不同的参比点的两组心电图R（r）波振幅。结果 以右前额为参比点记录的心电图R（r）波振幅比以中心电端为参比点的心电图R（r）波振幅大，具显著性差异（P<0.05）。结论 右前额作为记录心电图的参比点要比中心电端优越。

Comparison of ECGs at two different reference points on guinea pig body surface

Objective To compare the ECGs recorded from 2 different reference points on guinea pig body surface. Method ECGs were recorded synchronously from each of 18 testing points distributed in 3 intercostal planes cross the body surface of 30 full-grown guinea pigs, using the central terminal and the right forehead as 2 reference points, respectively. Comparison was made between the 2 groups of ECG R(r) wave amplitude from each of 18 points. Results R(r) wave amplitude with the right forehead as the reference point was significantly larger than that with the central terminal as the reference point (P<0.05). Conclusion The reference point for ECG recording on the right forehead is superior to that on the central terminal.