Question?問(wèn)題：

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??

急性二尖瓣返流（MR），急性心梗危機(jī)生命并發(fā)癥，是表現(xiàn)為突發(fā)性嚴(yán)重肺水腫，低血壓，和心源性休克的心臟急診。沒(méi)有雜音可以排除這個(gè)診斷嗎？為什么？

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.?

50%中度到重度MR患者沒(méi)有可聽(tīng)到的雜音。由于降低的心室功能限制了房室壓差，返流流速，和既而產(chǎn)生的雜音，因此嚴(yán)重MR可以無(wú)雜音的。

參考文獻(xiàn)：

Cureus. 2021;13:e13996