小的外周肺动脉血栓栓子。这样的小栓子一般对机体的影响很小，只有众多的小栓子突然或者在一段时间内进入肺循环，才会造成严重影响，可能导致肺高血压。
Here is a small peripheral pumonary artery thromboembolus. Such a small PE such as this one would probably not be noticed or cause problems unless there were many of them showered into the pulmonary circulation at once or over a period of time. This could lead to pulmonary hypertension
