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目的：观察犬心大面积右室、左室梗塞时的Ｗｉｌｓｏｎ导联和头胸（ＨＣ）导联右胸心电图变化特征。方法：结扎犬心４支冠状动脉（冠脉），造成大面积右室、左室梗塞并发右心衰竭和心原性休克模型，观察６只犬在正常时、依序结扎每支冠脉后以及第６小时共６个时间段ＷｉｌｓｏｎＶ３Ｒ～Ｖ６Ｒ和相同部位头胸ＨＶ３Ｒ～ＨＶ６Ｒ图形变化。结果：正常犬两种导联图形相似，均呈Ｒ（Ｒｓ）或ｒＳ型；无病理Ｑ波。ＳＴ段抬高、病理Ｑ波和Ｒ波丢失为急性右室心肌缺血和梗塞的敏感指标。在右室小范围缺血早期，仅ＨＶ３Ｒ～ＨＶ６ＲＳＴ段抬高（≥１ｍｍ）达诊断标准，并且抬高幅度始终超过同部位、同时间Ｗｉｌｓｏｎ导联。结论：ＨＣ导联右胸图形的特征性改变较Ｗｉｌｓｏｎ导联更利于右室梗塞的检出。
Objective: To observe the changes of right chest electrocardiogram (ECG) of Wilson lead and head-chest (HC) lead in large right ventricle and left ventricular infarction. Methods: Ligation of canine heart and 4 coronary arteries (coronary arteries) resulted in a large area of right ventricle and left ventricular infarction with right ventricular failure and cardiogenic shock model. Six dogs were normal ligation of each coronary artery And 6 hours of WilsonV3R ~ V6R at 6 time points and HV3R ~ HV6R changes of the same part of the head and chest. Results: The two dogs in normal dogs showed similar patterns with R (Rs) or rS type; no pathological Q wave. ST-segment elevation, pathological Q wave and R wave loss are sensitive indicators of acute right ventricular ischemia and infarction. In the early stage of right ventricular small-scale ischemia, only the HV3R ~ HV6RST segment elevation (≥1mm) up to the diagnostic criteria, and the extent of elevation is always higher than the same site, with the same time, Wilson lead. CONCLUSIONS: The characteristic changes of the right chest pattern of the HC leads are more favorable for the detection of right ventricular infarction than the Wilson leads.