Cumulatively, they have the same effect as a large saddle pulmonary embolus. 此种病变慢慢发展，最终可引起与较大的肺部鞍状血栓栓塞一样的后果。
The main pulmonary trunk and pulmonary arteries to right and left lungs are seen here opened to reveal a large "saddle" pulmonary thromboembolus. 可见剖开的肺动脉主干和左肺动脉右肺动脉内有一个大的鞍状的肺血栓栓子。
