一例73岁男性患者,四个月来在餐后一刻钟发生视力模糊和复视,15分后症状恶化,1—2小时后仅存光感,并伴有眩晕和轻度恶心,但无意识和出汗障碍。2年前在短距离行走后或从仰卧突然站起时有过眩晕、复视和视力模糊史,29年前行过胃部分切除术。体检见仅能在右股部和右腘部触到脉 A 73-year-old man with blurred vision and double vision at quarter an hour after a meal in four months had worse symptoms after 15 minutes, only light perception after 1-2 hours, accompanied by dizziness and mild nausea but unconsciousness Sweating disorder. 2 years ago, after walking a short distance or standing up from his supine suddenly had dizziness, diplopia and blurred vision history, 29 years ago underwent partial gastrectomy. Physical examination can only touch the right femoral and right 腘 Department of pulse