心室期前收缩之后出现代偿间歇的原因是（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25936' and id < 2179454 and id<>'2179454' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25936' and id > 2179454 and id<>'2179454' order by id asc limit 5