Occasionally a blood clot in a vein or in the right side of the heart can pass through the ASD and enter the blood stream, where it can block an artery supplying the brain and cause a stroke.

• 偶然情况下，静脉或者右侧心脏的血液凝块会穿过心房间隔缺损处混入血流，这样就可能阻塞脑部供血的动脉并引起中风。