2.25歲女病人因呼吸困難及心悸就診。身體診察顯示血壓110/64 mmHg,脈搏116/min,兩側
肺底可聽見濕性囉音。心臟聽診發現第一心音增加,心尖部位及胸骨左側下緣可聽見明顯的
二尖瓣開瓣音(opening snap, OS)及心舒期隆隆雜音(diastolic rumbling murmur)。下列
敘述何者正確?
(A)第一心音增加,表示二尖瓣狹窄不嚴重
(B)第二心音至開瓣音的間期(S2
-OS interval)愈長表示二尖瓣狹窄愈嚴重
(C)心跳快為此類病人心臟的代償機轉,此時把心跳降低對病情不好,反而加重
(D)diastolic rumbling murmur在此類病人發生心臟衰竭加重,心臟排血量低時,心雜音強度可
能減弱甚至消失
答案:登入後查看
統計: A(4), B(33), C(29), D(63), E(0) #1043402
統計: A(4), B(33), C(29), D(63), E(0) #1043402
詳解 (共 5 筆)
#4041066
Opening snap:
When mitral stenosis is severe, left atrial pressure is higher, and the pressure crossover point between the LV and left atrium is closer to S2, which reduces the S2-opening snap interval.
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