但室间隔缺损合并三尖瓣反流、左心室右心房分流、部分性或完全性房室间隔缺损、肺静脉异位引流至右心房或腔静脉或体循环动静脉瘘均可导致有心房血氧饱和度升高。
O B-dis I-dis I-dis I-dis I-dis O O B-dis I-dis I-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O O O O O B-ite I-ite I-ite I-ite I-ite I-ite I-ite O O O