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| About the incorrect description of ventricular repolarization order: discussion on ventricular depolarization and repolarization process, and direction consistency mechanism of QRS-T |
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Abstract In traditional opinion, the direction consistency of QRST is resulted from the fact that the location depolarized first is repolarized after. It confuses the concepts of depolarization and repolarization, in which 3 phases are mistakenly regarded as the whole of repolarization, 2 phases are taken as the continuation of depolarization, and the variation of repolarization process is attributed to external causes without noticing the huge difference of electrophysiologic features in ventricular myocytes. Actually, where is depolarized first is necessarily repolarized first, but where is depolarized after is repolarized faster and finishes earlier, which makes membrane potential gradient of the whole ventricle points to outer membrane. Therefore, the vectors of QRS and T orient to almost the same direction.
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| [1] 陈文彬，潘祥林.诊断学[M].8版.北京：人民卫生出版社，2013：483.[2] 姚泰.生理学[M].6版.北京：人民卫生出版社，2005：132.[3] Yan GX，Antzelevitch C.Cellular basis for the normal T wave and the electrocardiographic manifestations of the longQT syndrome[J]. Circulation，1998，98（18）:1928-1936.[4] Opthof T，Coronel R，WilmsSchopman FJ，et al. Dispersion of repolarization in canine ventricle and the electrocardiographic T wave:Tp-e interval does not reflect transmural dispersion[J]. Heart Rhythm，2007，4（3）:341-348. |
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2016, Vol. 25 
