问题
单项选择题
A child, age 4, is admitted with a tentative diagnosis of congenital heart disease. When assessment reveals a bounding radial pulse coupled with a weak femoral pulse, the nurse suspects that the child has
A．patent ductus arteriosus.
B．coarctation of the aorta.
C．a ventricular septal defect.
D．truncus arteriosus.
答案
参考答案：B
解析：Coarctation of the aorta causes signs of peripheral hypoperfusion, such as a weak femoral pulse and a bounding radial pulse. These signs are rare in patent ductus arteriosus, ventricular septal defect, and truncus arteriosus.