压力负荷联合超容量负荷致家兔心力衰竭模型的建立

目的 探讨压力负荷联合超容量负荷建立家兔心衰模型的可行性.方法 16只家兔随机分心衰组(8只)和假手术组(8只);先制备腹主动脉缩窄、1周后制备主动脉瓣关闭不全致压力负荷及超容量负荷,利用心导管术和心脏多谱勒观察手术前后家兔血流动力学及心脏结构和功能的变化.结果 (1)心衰组术后主动脉收缩压、脉压、左室舒张末压较术前明显增加(P<0.05);(2)心衰组术后左房内径、室间隔厚度、左室后壁厚度、左室收缩和舒张末内径均明显增加(P<0.05),射血分数及左室缩短率明显降低(P<0.05);(3)心衰组心脏及左室/体重比、肺脏/体重比明显高于假手术组(P<0.05).结论 压力负荷联合超容量负荷建立心衰模型方法可行,心衰形成时间短,成功率高,符合人类心衰病理生理过程.

Establishing a model of heart failure induced by pressure overload plus volume in rabbits

Objective To establish an animal model of heart failure induced by pressure overload plus volume in rabbits. Methods Sixteen rabbits were divided into heart failure and sham-operated groups with 8 animals each. We obtained a volume overload by creation of an aortic insufficiency at first,and then obtained pressure overload induced by constricting the abdominal aorta 7 days later. The homodynamic parameters and cardiac structure and function were detected via catheterization and echocardiography respectively...