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A 型题: 1.观察右心房的最佳位置是: A.后前位,B.右前斜位(45°-55°),C.左前斜位(60°-65°),D.左前斜位(30°-45°),E.左侧位。 2.左心房增大早期常见的X线表现是: A.正位:左心缘出现第三弓(左心耳),B.右心缘出现双重边缘阴影,C.气管分叉角度加大,D.左前斜位:左主支气管抬高、受压、变窄,E.右前斜位:食管中段前壁显示局限性压迹。 3.诊断二尖瓣狭窄的可靠X线征象是: A.心影呈二尖瓣型,B.左心房增大,C.右心
A type of problem: 1. The best observation of the right atrium is: A. posterior, B. Right anterior oblique (45 ° -55 °), C. anterior left oblique (60 ° -65 °), D. left front Oblique position (30 ° -45 °), E. Left position. 2. Left atrial enlargement of the early common X-ray performance is: A. Orthodontics: the left edge of the third bow (left atrial appendage), B. Right edge of the double edge of the shadow, C. Tracheal bifurcation angle increases, D. left anterior oblique: the left main bronchial elevation, compression, narrowing, E. right anterior oblique: the anterior esophagus shows the limitations of the anterior depressions. 3. Diagnosis of mitral stenosis and reliable X-ray signs are: A. mitral valve was type, B. atrial enlargement, C. right heart