Which of the following is NOT one of the disadvantages of a longitudinal research?
A.The subjects may become irritated at repeated testing.
B.The participants in the study may not stay in one place for many years.
C.The behavior. of a subject in the study may be measured continuously for many years.
D.Social changes may be reflected in the behaviors of the subjects participating in the study.
第1题
心电图表现为P波高尖,肢体导联P波电压>0.25mV的是
A、左心房肥大
B、右心房肥大
C、左心室肥大
D、右心室肥大
E、双侧心室肥大
第3题
A.P波时限>0.12s
B. Ptf绝对值为0.05mm.s
C. P、.振幅≥0.25mV,P波高尖
D. Ⅱ、Ⅲ、aVF导联P波双峰,峰间距≥0.04s
E. P波形态圆钝,振幅在肢体导联<0.25mV,在胸导联<0.20mV
第4题
A.P波时限>0.12s
B.Ptf绝对值为0.05mm.s
C.P、.振幅≥0.25mV,P波高尖
D.Ⅱ、Ⅲ、aVF导联P波双峰,峰间距≥0.04s
E.P波形态圆钝,振幅在肢体导联<0.25mV,在胸导联<0.20mV
第5题
A.II.III.AVF导联P波异常高大,电压大于0.25毫伏。
B.I.AVL导联P波低平或倒置
C.P波时间正常
D.V1V2导联P波多高尖,少数低平或倒置。
E.以上都对
第6题
A.P波时限>0.12s
B.PtfV1绝对值为0.05(mm·s)
C.PⅡ.Ⅲ.aVF振幅≥0.25mV,P波高尖
D.Ⅱ.Ⅲ.aVF导联P波双峰,峰间距≥0.04s
E.P波形态圆钝,振幅在肢体导联<0.25mV,在胸导联<0.20mV
第7题
关于心电图P波的描述,正确的是
A.正常人P波时间大于0.12s
B.反映心房的复极过程
C.胸导联P波振幅大于0.2mV
D.肢体导联P波的振幅大于0.25mV
E.在Ⅰ、Ⅱ、aVF导联P波均向上
第8题
符合右心房肥大心电图特点的是()
A.P波时间=0.15s
B.P波时间=0.10s
C.Ⅰ导联P波振幅=0.1mV
D.aVL导联P波振幅=0.22mV
E.Ⅱ导联P波振幅=0.3mV
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