房颤时左房内可见明显异常的血流淤滞，在超声下有自发的异常显影；

Abnormal changes in flow are evident by stasis in the left atrium, and seen as spontaneous echocontrast.

youdao

结论加强围术期风险评估，凡存在高凝状态、静脉血流淤滞或血管损伤，都应做相关检查确诊。

Conclusion Enhancing perioperative risk assessment, where there is hypercoagulable state, venous blood flow stasis or vascular damage, should be relevant to confirm the diagnosis.

youdao

血流淤滞：由于血管扩张、炎症渗出，使血流变慢，这有利于炎症介质和炎细胞聚集引起炎症刺激。

Vascular stasis: slowing of the blood in the bloodstream with vasodilation and fluid exudation to allow chemical mediators and inflammatory cells to collect and respond to the stimulus.

youdao