The trans-esophageal cardiography showed no thrombus formation but heavy calcification of mitral valves, which was believed to be the predisposing factor of retinal arteries occlusion.

• 此病患颈动脉超音波检查并无异常，经食道心脏超音波没有发现血栓形成，但僧帽瓣有厉害的钙化。