To reduce the surgical trauma of cardiac surgery.Twenty cases of cangenital heart septal defect were repaired via the limited lower sternotomy with cardiopulmonary bypass under beating heart.

• 为了减轻心脏手术的创伤，采用局限性低位胸骨劈开在体外循环心脏跳动中为20例患者施行了先天性心脏间隔缺损修补术。