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研究150例法乐四联征患儿行根治术术前术后在室容积及收缩功能的变化，发现术前患儿左室容积普遍较小，每博指数及心脏指数亦明显低于正常；但术后两周上述三项指标明显增大，至术后3个月达正常值；手术前后左室射血分数及内径缩短率均正常.左室容积与术后低心排征的发生率有明显的关系，但对手术死亡率无明显影响：左室容积只是影响法乐四联症手术效果的因素之一，即使占室容积非常小,只要手术矫正畸形完全,术后处理得当，同样能取得满意的效果。
To study the changes of ventricular volume and systolic function before and after radical surgery in 150 children with tetralogy of Fallot. Preoperative left ventricular volume was generally smaller, and the Perbola index and cardiac index were also significantly lower than normal. However, the above three indexes increased significantly two weeks after operation, reaching the normal value at 3 months after operation.The left ventricular ejection fraction and the diameter shortening rate were normal before and after surgery.The incidence of left ventricular volume and postoperative low cardiac output There is a clear relationship, but no significant effect on the surgical mortality: left ventricular volume is only one of the factors that affect the tetralogy of Fallot operation, even if the occupying volume is very small, as long as the surgical correction of deformity, postoperatively treated properly Can achieve satisfactory results.