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应用接触电极和悬浮微电极,同步记录比较了在位兔心左室心外膜单相动作电位和跨膜动作电位,发现MAP的复极过程与其相邻近的细胞TAP相类似;两者在心律失常和使用河豚毒索情况下所引起的形态、振幅和时程的变化也是一致的。同步记录MAP和TAP显示:证明MAP和TAP的去极相能指示兴奋到达该处细胞的确切时间。对比心表心电图、TAP、MAP以及和MAP的内在转折相比较,推断MAP的内在转折是由心表心电图的Rs波所引起;单相动作电位是在损伤电位的基础上产生的。
Using contact and suspension microelectrodes, simultaneous recording and comparing single-phase and trans-membrane action potentials of left ventricular epicardium in rabbits showed that the repolarization process of MAP was similar to that of adjacent cells TAP. Arrhythmia and the use of tetrodotoxin caused by changes in shape, amplitude and duration are also consistent. Simultaneous recording of MAP and TAP displays: Demonstrate that the depolarization of MAP and TAP can indicate the exact time of excitement reaching the cell. Comparing the epicardial ECG, TAP, MAP, and intrinsic transitions with MAP, it is inferred that the intrinsic transition of MAP is caused by the Rs wave of the cardiograph; the single-phase action potential is based on the lesion potential.