豚鼠慢性充血性心力衰竭及致心肌肥厚模型的研究

目的 :探讨豚鼠慢性充血性心力衰竭 (CHF)及致心肌肥厚的动物模型制作方法。　方法 :采用升主动脉缩窄制作豚鼠CHF模型 (模型组 ,n =1 3) ,与对照组 (n =1 0 )同室饲养。 6周后观察以下指标 :临床表现、血流动力学、双心室重量与体重比值及室壁厚度。　结果 :模型组中 ,1只豚鼠死亡。未出现呼吸困难 4只中 :左心室舒张末压轻度增高 ,但无显著差异 ;双心室重量与体重比值增高。合并呼吸困难的 8只中 ,左心室舒张末压明显增高 ,双心室重量与体重比值增高 ,室壁厚度增加。　结论 :升主动脉缩窄 6周 ,豚鼠CHF及致心肌肥厚的动物模型基本形成。

The experimental study on the animal model of guinea-pig chronic heart failure and compensatory hypertropgy

Objective:To investigate the animal model of guinea pig chronic heart failure and compensatory hypertrophy. Methods:Thirteen chronic heart failure models were made by placing a constricting band around the ascending aorta of guinea pigs,raised in the same house of 10 normal guinea pigs. The contrasting indexes in 6 weeks include: clinical features, hemodynamics, the mass ratio of ventricular over body, the width of left ventriculat hypertrophy. Results:One model died, 4 models without dyspnea showed increasing in left ventricular pressure and the mass ratio of ventricular over body, whereas the left ventricular end diastolic pressure showecl no significant different. Eight models with dyspnea showed striking increasing in left ventricular pressure and left ventricular end diastolic pressure, as well as the mass ratio of ventricular over body and the width of left ventricular hypertrophy. Conclusion:The animal model of guinea pig chronic heart failure and compensatory hypertrophy may be formed by constricting the ascending aortas of guinea pigs for 6 weeks.