心脏杂音是血流从左心室到升主动脉通过狭窄的主动脉瓣口时产生的湍流引起的噪音。
A heart murmur is simply a noise caused by the turbulence of blood flowing through the obstruction from the right ventricle to the pulmonary artery.
研究者发现，“成功的瓣膜植入可明显降低经主动脉瓣口的压力梯度。”
"Successful device implantation resulted in a marked reduction of aortic transvalvular gradients, " the investigators found.
利用彩色多普勒观察主动脉瓣口有无返流。
Pulsed Doppler and color Doppler were used to observe the existence of aortic regurgitation.
发生在心血管系统者，多发生在感染后10 ~20年，可表现为主动脉炎、主动脉瓣关闭不全、主动脉瘤、冠状动脉口狭窄或阻塞、心肌炎等。
In the cardiovascular system, the infection occurred after 10 ~ 20, the performance of the aortic - yim, aortic insufficiency, aortic aneurysms, coronary stenosis or obstruction, such as myocarditis.
发生在心血管系统者，多发生在感染后10 ~20年，可表现为主动脉炎、主动脉瓣关闭不全、主动脉瘤、冠状动脉口狭窄或阻塞、心肌炎等。
In the cardiovascular system, the infection occurred after 10 ~ 20, the performance of the aortic - yim, aortic insufficiency, aortic aneurysms, coronary stenosis or obstruction, such as myocarditis.
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