To compare length of stay of the initial neonatal hospitalization and mortality across multiple stages of surgical palliation for infants with left‐sided obstructive lesions and severely restrictive or intact atrial septum (I/RAS).

中文翻译：

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左侧阻塞性病变和房间隔狭窄的胎儿的肺静脉多普勒分布和中期结局。

为了比较左侧阻塞性病变和严重局限性或完整房间隔（I / RAS）的婴儿在新生儿外科住院多个阶段的住院时间和死亡率。