某患者1年前曾有剧烈胸痛史，现做心电图检查，出现以下哪项改变能帮助判断当时曾患急性下壁心肌梗死

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30586' and id < 2467887 and id<>'2467887' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30586' and id > 2467887 and id<>'2467887' order by id asc limit 5