患者女性，72岁。自觉有心跳不齐感，心电图检查见图4-2-3。以下为该心电图的诊断，其中错误的是（）。
A.伪差
B.心房颤动
C.窦性心律不齐
D.一度房室传导阻滞
E.左前分支阻滞
参考答案：B
解析：乍一看，心电图似乎显示为心房颤动，且R-R间距不等。但仔细观察发现每一个QRS波前都存在明显的窦性P波，实为窦性心律不齐，而基线快速的波动波属伪差。另外，可见PR间期延长至0.24s，存在一度房室传导阻滞。QRS心电轴左偏超过-45°，QRS波群时间延长至0.11s，支持左前分支阻滞的诊断。需要注意的是，左前、分支阻滞可引起胸导联R波递增不良，表现为V5、V6导联S波加深，胸导联呈顺钟向转位，易误认为右心室肥厚。
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Mrs. Black was a famous musician a few years ago. She __1__ music at a school and her students did well in their lessons. They liked her very much. Now the old woman stays at home with her husband. The old man looks after his wife well and she __2__ worries about anything. And she is very __3__. Just like some old people, Mrs. Black finds that her memory (记忆) is falling. Sometimes she __4__ what she did or will do. It often gets her in trouble. Her __5__ noticed (注意到) it and asked her to see a famous doctor. He bought two tickets __6__ London and told her he put __7__ into her handbag while she was playing the piano. The next morning, they got to the __8__ just on time to catch the plane. Mrs. Black said,"I wish we had the __9__ with us." "Don't be a fool, dear!"said Mr. Black,"We are not going to a concert, but to see a __10__." "I know,"she said,"but I left the tickets on it!" | ||||
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