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1964年Morris首先提出Ptf V_1的诊断意义,认为其负值增大系左心受累继发左房扩张,以致在横面的向量向后旋转,以及左房传导延迟或传导途径延长。Ptf V_1是指心电图V_1导联P波的终末电势:是以P波终末负性波的振幅(mm)和时间(S)的乘积表示。作者选择1988年4月～1989年2月期间经临床诊断心衰患者40例,均按上述测量
In 1964, Morris first proposed the diagnostic significance of Ptf V_1. It is believed that the negative value of the increase in left ventricular involvement secondary to left atrial dilatation, resulting in backward rotation of the transverse vector, and delayed left atrial conduction or prolonged conduction. Ptf V_1 refers to the terminal potential of the P wave of the ECG V_1 lead: It is expressed as the product of the amplitude (mm) of the negative end of the P wave and the time (S). The authors selected from April 1988 to February 1989 during the clinical diagnosis of heart failure in 40 patients, according to the above measurement