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It takes years of constant academic toil to reach a level of sophistication which is essential to function effectively in today's very complex world.
不属于室性期前收缩的心电图特点的是?
A. 提前出现的宽大QRS波
B. 宽大QRS波前无P波
C. 其T波方向与QRS主波方向相反
D. 代偿间期不完全
E. QRS波时间＞0.12s
在正常心电图的各项参数中，不正确的是?
A. P波宽度＜0.12s，P波振幅在肢导联＜0.25mV，在胸导联＜0.20mV
B. P-R间期为0.12～0.20s，QRS间期为0.06～0.10s
C. Q波＜0.04s，振幅＜1/4R
D. S-T段在任何导联下移可超过0.05mV
E. Q-T间期正常范围可在0.32～0.44s
不属于心室颤动的心电图表现的是?
A. QRS-T波群消失
B. 出现大小不等，极不匀齐的低小波
C. 频率为200～500次/min
D. 是最严重的致死性心律失常
E. 心房率与心室率不等
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