| 改良左旋支结扎法微创小型猪急性心肌梗死模型建立与评估 |
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| 引用本文： | 兰琴,王竹林,曹浩,韩析言,董云,朱鸿明,范慧敏. 改良左旋支结扎法微创小型猪急性心肌梗死模型建立与评估[J]. 实验动物与比较医学, 2017, 25(4): 414-419 |
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| 作者姓名： | 兰琴 王竹林 曹浩 韩析言 董云 朱鸿明 范慧敏 |
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| 作者单位： | 同济大学附属东方医院转化医学中心, 上海 200120,同济大学附属东方医院转化医学中心, 上海 200120,同济大学附属东方医院心衰专科, 上海 200120,同济大学附属东方医院转化医学中心, 上海 200120,同济大学附属东方医院心脏超声科, 上海 200120,同济大学附属东方医院转化医学中心, 上海 200120,同济大学附属东方医院转化医学中心, 上海 200120;同济大学附属东方医院心衰专科, 上海 200120 |
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| 基金项目： | 国家自然科学基金（编号：81470393）；上海市领军人才（编号：2012053）；上海市浦东新区卫生系统优秀青年医学人才培养计划（编号：PWRq2014-01）。 |
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| 摘 要： | 目的 应用改良的左冠状动脉回旋支结扎方法联合微创手术，制备小型猪急性心肌梗死模型，评估其有效性和稳定性，并探讨其在科研应用中的意义。方法 选择3月龄巴马香猪25头，麻醉下行气管插管呼吸机辅助通气，微创开胸结扎左旋支中段，建立急性心肌梗死模型。并于术前、术后1 h、4周行心脏超声评估模型动物的心脏功能，术后4周处死动物，取心脏行TTC染色评估梗死面积及病理变化，统计死亡率和死亡原因。结果 结扎术后1 h和4周后心脏功能较术前均明显降低，EF值由（64.2±4.6）%分别降至（48.2±5.3）%和（49.7±6.1）%（P<0.01），左心室侧壁室壁厚度变薄，胶原增生。梗死后1 h室颤率17.3%，梗死面积为（19.2±3）%。结论 应用改良的左冠状动脉回旋支结扎方法联合微创手术能够建立稳定的猪心肌梗死模型，具有手术创伤小、模型稳定和死亡率低等特点，为相关研究提供了经济、理想的动物模型。
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| 关 键 词： | 急性心肌梗死 小型猪 回旋支冠状动脉 |
| 收稿时间： | 2017-03-02 |
An improved method for preparation and evaluation of a porcine model of acute myocardial infarction by minimally invasive surgery and left circumflex artery ligation |
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| LAN Qin,WANG Zhu-lin,CAO Hao,HAN Xi-yan,DONG Yun,ZHU Hong-ming and FAN Hui-min. An improved method for preparation and evaluation of a porcine model of acute myocardial infarction by minimally invasive surgery and left circumflex artery ligation[J]. Laboratory Animal and Comparative Medicine, 2017, 25(4): 414-419 |
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| Authors: | LAN Qin WANG Zhu-lin CAO Hao HAN Xi-yan DONG Yun ZHU Hong-ming FAN Hui-min |
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| Affiliation: | Research Center for Translational Medicine, East Hospital, Tongji University, Shanghai 200120, China,Research Center for Translational Medicine, East Hospital, Tongji University, Shanghai 200120, China,Department of Heart Failure, East Hospital, Tongji University, Shanghai 200120,Research Center for Translational Medicine, East Hospital, Tongji University, Shanghai 200120, China,Department of Cardiac Ultrasound, East Hospital, Tongji University, Shanghai 200120,Research Center for Translational Medicine, East Hospital, Tongji University, Shanghai 200120, China and Research Center for Translational Medicine, East Hospital, Tongji University, Shanghai 200120, China;Department of Heart Failure, East Hospital, Tongji University, Shanghai 200120 |
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| Abstract: | Objective To develop a better method for preparation of porcine model of acute myocardial infarction by permanent occlusion of the left circumflex coronary artery and minimally invasive surgery, evaluate its validity and stability, and explore its application in experimental studies of ischemic heart diseases. Methods 25 healthy female 3-month-old Bama minipigs, body weight 25±3 kg, were used in this study. The porcine model of myocardial infarction was established by minimally invasive surgery and the left circumflex artery ligation at the site of OM1 posterior position under general anesthesia. Heart function was assessed by echocardiography at 15 min before surgery, 1 hour and 4 weeks after surgery. Pathological examination was performed at 4 weeks after the left circumflex artery occlusion. The mortality and cause of death were statistically analyzed. Results The 1-hour and 4-week postoperative cardiac function was considerably decreased, showing a decreased ejection fraction from 64.2±4.6% to 48.2±5.3% (1hour after MI) and 49.7±6.1% (4 weeks after MI) (P<0.01). Pathological examination revealed that the ventricular wall was thinner and the amount of collagens was increased in the infracted area. The ventricular fibrillation rate at 1-hour after myocardial infarction was 17.3% and the infarction area was 19.2%. Conclusions A pig model of acute myocardial infarction can be prepared by our modified left circumflex coronary artery ligation at the obtuse marginal artery (OM1) and minimally invasive surgery. This model exhibits advantages such as minimal surgical trauma, high stability of the model, and low mortality, therefore, provides an ideal and economic animal model for experimental studies on acute ischemic heart diseases. |
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| Keywords: | Acute myocardial infarction Minipig Left circumflex coronary artery |
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