多项选择题

A.P波的宽度不超过0.11s
B.P-R间期在0.12~0.20s
C.QRS波群的宽度在0.06~0.10s之间
D.T波的振幅不应低于同导联R波的1/4
E.Q-T间期的正常范围为0.32~0.44s