求翻译：摘要 目的：探讨枸橼酸西地那非对先天性心脏病合并肺动脉高压的适应症，以及围术期的疗效观察。方法：分组对照分析，A组：围术期未用枸橼酸西地那非是什么意思？

Abstract Objective: To evaluate the efficacy of sildenafil citrate indications for congenital heart disease with pulmonary hypertension, and perioperative observation. Method: grouping control analysis, a group: perioperative unused sildenafil citrate

Summary: Explore there citric acid to the west of congenital heart disease merge non-pulmonary artery pressure the indications for surgery, as well as the efficacy of observation. METHODS: The group contrast analysis, A groups: technical view of citric acid is not used there in the non-West

Abstract goal: West the discussion citric acid that must to the congenital heart disease merge pulmonary artery high pressure indication, as well as encircles the technique time the curative effect observation.Method: Grouping check analysis, A group: Encircles the technique time not to use west the

Summary objective: explore citrate sildenafil indications of congenital heart disease with pulmonary hypertension and perioperative observation. Methods: a comparative analysis of group, group a: perioperative unused citrate sildenafil

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