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U波产生的机理尚未明确.有两种主要学说,一种认为U波产生于心室舒张的机械性结果,另一种则认为与浦顷野纤维复极有关.正常U波向量大致与T波向量平行,任何一个导联出现U波倒置即属异常.U波倒置是提示有心脏病存在的一个高度特异的指标,很少见于无心脏病或其它心电图异常时.本文488名U波倒置病例多数在40～80岁之间,以高血压病(193例)、缺血性心脏病(162例)以及主动脉瓣与二尖瓣关闭不全(56例)最为多见,仅35例无心脏病.除25例(5%)外,均同时有其他心电图异常.
The mechanism of U wave generation is not clear.Have two main doctrines, one is that the U wave produced in the mechanical results of ventricular diastole, and the other is considered and Pu are wild fiber repolarization .U normal U wave vector roughly with the T wave Vector parallel to any one lead U wave inversion is an exception .U wave inversion is prompted to have a highly specific index of heart disease, is rarely seen in the absence of heart disease or other ECG abnormalities .In this paper, 488 cases of U wave inversion most Between 40 and 80 years of age, hypertension (193 cases), ischemic heart disease (162 cases) and aortic valve and mitral regurgitation (56 cases) were most common, with only 35 without heart disease. In addition to 25 cases (5%), there are other ECG abnormalities.