容积导体对离体蟾蜍心电的影响  

The effects of volume conductor on ECG in isolated heart of toad

作　　者：史为清[1] 王俊杰[1] 杜晶[1] 刘文彦[1] 

机构地区：[1]济宁医学院基础学院,山东济宁272067

出　　处：《济宁医学院学报》2013年第2期103-105,共3页Journal of Jining Medical University

基　　金：2011年济宁医学院青年科研基金(JYQ2011KM019)

摘　　要：目的探讨容积导体对离体蟾蜍心电的影响。方法离体蟾蜍心脏置培养皿中央,培养皿内加入林格氏液,在培养皿周边置电极记录心电。结果心电图R波幅度随心脏周围容积导体的增大明显减小。容积导体由1ml增大到5ml,R波幅度即明显减小,由(0.99±0.12)mV减小到(0.53±0.06)mV,减小46.5%;当容积导体增大到30ml时,R波减小94.9%。结论心电图受心脏周围容积导体或组织液量的影响。Objective To study the effect of volume conductor on ECG in isolated heart of toad. Methods The isolated toad heart was placed in the middle of petri dish,and ringer＇s solution was dripped into the petri dish, whose rim was connected with the recording electrodes so as to get ECG.Resuits Amplitude of R wave in ECG decreased distinctively while volume conductor increased. Amplitude of R wave decreased to be 0.53 0.06mv from 0.99 =t= 0.12mv when volume conductor increased from lml to 5ml, and the decreasing rate was 46.5 %. Amplitude less- ened 94.9 % with volume conductor raising to be 30ml. Conclusion ECG could be influenced by volume conductor or volume of tissue fluid around the heart.

关 键 词：容积导体 心电图 R波 离体蟾蜍心脏 

分 类 号：R31[医药卫生—基础医学]