1. Animal model of coronary microembolization under transthoracic echocardiographic guidance in rats
- Author
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Manlu Fan, Weixin Sun, Huaqin Tong, Haowen Zhang, Jie Han, Sheng-Feng Lu, Tong Sun, Songyi Cheng, Xiaohu Chen, Xuan Han, Jiandong Chen, and Qian Zhang
- Subjects
Male ,medicine.medical_specialty ,Cardiac fibrosis ,medicine.medical_treatment ,Embolism ,education ,Biophysics ,Lung injury ,Biochemistry ,Fibrin ,Rats, Sprague-Dawley ,Animal model ,Internal medicine ,medicine ,Animals ,Thoracotomy ,Molecular Biology ,Ejection fraction ,biology ,business.industry ,Postoperative complication ,Thrombosis ,Cell Biology ,medicine.disease ,Coronary Vessels ,Disease Models, Animal ,Echocardiography ,Cardiology ,biology.protein ,Breathing ,business - Abstract
The aim of the study was to develop a model of coronary microembolization (CME) in rats at a lower cost. We developed a novel rat model without thoracotomy and ventilation under the guidance of echocardiography. Rats were sacrificed at 3 h, 24 h and 1 month postoperatively in both the Echo-CME and Open-chest CME groups for the comparison of the modeling accuracy, mortality, cardiopulmonary circulation, pleural adhesion and ventilation-induced lung injury (VILI). Results showed that the coronary microthrombus formed at 3 h and reached its peak at 24 h postoperatively, which included platelet aggregation and fibrin web. The Echo-group increases success rates, decreased mortality, postoperative complications including pleural adhesion, cardiopulmonary dysfunction and VILI postoperatively than the Open-chest group at 1month postoperatively. The ejection fraction of the CME group decreased to 50% and obvious cardiac fibrosis formed at 3 months postoperatively. Our unique surgical method provided a platform to study molecular mechanisms and potential new pathways for CME treatment.
- Published
- 2021