Comparison of ECGs of New Zealand rabbits with myocardial necrosis recorded by headª²chest leads and routine leads

    GONG Hongª²Wu, MENG Suª²Rong, YIN Binª²Sheng

    1Cardiovascular Centre, PLA 452 Hospital, Chengdu 610021, China

    2Nanfang Hospital, Southern Medical University, Guangzhou 510515, China

    3Research Centre of Cardiac Electricity, Southen Medical University, Guangzhou 510515, China

    ¡¾Abstract¡¿ AIM: To observe and compare the ECGs of the New Zealand rabbits with normal myocardium or myocardial necrosis recorded by headª²chest lead and routine leads, and to summarize their changes and explore their mechanisms. METHODS: A selfª²made doubleª²barreled cannula was used to attach on the anterior wall of left ventricle. Some pure iceª²cold acetic acid was poured on the anterior wall to induce a regional necrosis. An ECG instrument in whole synchronization of 24 leads was used to record the ECGs of the rabbits with normal or myocardial necrosis and analyze the wave shape and swing of the 2 different kinds of ECGs. RESULTS: The most of left ventricular myocardial necrosis were subepicardial necrosis which was limited in the half of the ventricular wall. The numbers of leads and rabbits with necrosis wave Q recorded by headª²chest leads were less than those recorded by routine leads. CONCLUSION: In the left ventricular subepicardial necrosis, the number of necrosis wave Q recorded by headª²chest leads is less than that recorded by routine leads. The former is consistent with pathological examination. Headª²chest leads indicate a more limited necrosis region. ......