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.
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。
Normally, oxygen-poor (blue) blood returns to the right atrium from the body, travels to the right ventricle, then is pumped through the pulmonary artery into the lungs where it receives oxygen.
正常情况下，贫氧血(色)全身回到右心房，进入右心室，然后被泵出经过肺动脉进入肺，在这里接受氧气。
Normally, oxygen-poor (blue) blood returns to the right atrium from the body, travels to the right ventricle, then is pumped through the pulmonary artery into the lungs where it receives oxygen.
正常情况下，贫氧血(色)全身回到右心房，进入右心室，然后被泵出经过肺动脉进入肺，在这里接受氧气。
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