text: 图9-29在超声心动图指导下行球囊心房间隔造口术超声心动图证实膨胀的球囊已经位于左心房RA：右心房RV：右心室LV：左心室（二）手术治疗在大动脉转换术被引入以前，20世纪60年代至80年代初期，大动脉转位患儿的治疗仅局限于心房置换，即在心房水平通过将体循环静脉血导引至左心室，肺静脉血引入右心室以纠正异常的血流动力学。
entities.entity: 超声心动图
entities.label: pro
entities.entity: 下行球囊心房间隔造口术
entities.label: pro
entities.entity: 超声心动图
entities.label: pro
entities.entity: 左心房
entities.label: bod
entities.entity: 右心房
entities.label: bod
entities.entity: 右心室
entities.label: bod
entities.entity: 左心室
entities.label: bod
entities.entity: 大动脉转换术
entities.label: pro
entities.entity: 大动脉转位
entities.label: dis
entities.entity: 心房置换
entities.label: pro
entities.entity: 心房
entities.label: bod
entities.entity: 左心室
entities.label: bod
entities.entity: 肺静脉血
entities.label: bod
entities.entity: 右心室
entities.label: bod
entities.entity: 异常
entities.label: bod