主动脉瓣反流时心尖部可存在（ ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='25457' and id < 2143869 and id<>'2143869' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='25457' and id > 2143869 and id<>'2143869' order by id asc limit 5