有些朋友可能在准备USMLE,在这抄一道临床的题，不知有人感兴趣吗。

题是从下面这个USMLE的官方网站抄的sample question，是step3的，其实step3和step2考的内容差不多。

http://www.usmle.org/step3/2006Step3.pdf

这道题挺简单，答案是：E

想讨论的是：1.诊断是什么？为什么？2.答案为什么不是A,B,C,D？看看有人感兴趣吗。

A 75-year-old white man comes to the office because of increasing shortness of breath on exertion for the past 2-3 months. He has a history of hypertension for which he takes hydrochlorothiazide. On physical examination his pulse is 80/min. There is an apical lift displaced to the left and a harsh diastolic murmur at the base. Further physical examination is most likely to show which of the following?

A: Bifid pulse
B: Low-amplitude pulse
C: Pulsus alternans
D: Pulsus paradoxus
E: Wide pulse pressure

所有跟帖： 

• 俺 是 外 行 ， -xiaocai- ♀ (228 bytes) () 07/03/2006 postreply 13:11:39

• 我的答案：1.最可能的诊断：主动脉瓣闭锁不全伴有左心室扩张及心功能 -老道- ♂ (607 bytes) () 07/03/2006 postreply 13:54:52