《急诊每日一题》严重二尖瓣返流可以是无杂音的2021年5月
Question 问题:
Acute MR, a life-threatening complication of MI, is a cardiac emergency as it presents with sudden onset flash pulmonary edema, hypotension, and cardiogenic shock. Does the lack of murmur essentially exclude the diagnosis? Why/why not?
急性二尖瓣返流,一个心肌梗塞危及生命的合并症,是心脏急诊,因为它通常表现为突发危重肺水肿,低血压,和心源性休克。没有心脏杂音基本上可以排除这个诊断吗?为什么能/为什么不能?

Answer 答案:
50% of patients with acute moderate to severe MR hAVe no audible murmur. Severe MR may be silent because reduced ventricular function minimizes the AV gradient, regurgitant flow, and subsequent murmur (Cureus. 2021;13:e13996).
50%中重度二尖瓣返流患者没有可听见的杂音。由于降低的心室功能最大程度上减低了房室压差,返流流量,及相应的杂音,严重二尖瓣返流可能是无杂音的。
参考文献:
Cureus. 2021;13:e13996