• 1. Department of Cardiothoracic Surgery, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200092, P. R. China;
  • 2. Department of Cardiac Surgery, The First Affiliated Hospital of Jilin University, Changchun 130021, P. R. China;
  • 3. Department of Cardiothoracic Surgery, Ningxia Autonomous Region Hospital, The First Affiliated Hospital of Northwest Ethnic University, Yinchuan 750021, P. R. China;
ANJun, Email: anjun73@hotmail.com
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Objective To establish a mouse model of pressure overload-induced heart failure via suprasternal notch approach. Methods Male mice were separated into a sham group and an experiment group. Through suprasternal notch approach, the aortic arch port between the origin of the right innominate and left common carotid arteries was partially clipped with tantalum clip, which had a remaining opening of 0.35 mm or 0.25 mm in diameter to cause progres-sively increased afterload. Echocardiography was performed 10 weeks after aortic arch clipped or sham surgery to deter-mine left ventricular end-diastolic diameter (LVEDD), left ventricular end-systolic diameter (LVESD), left ventricular posterior wall end-diastolic thickness (LVPWD), ejection fraction (EF) and fractional shortening (FS). After hemodynamic recordings were completed, mouse body weight (BW) and heart weight (HW) were measured for obtaining HW/BW ratio (mg/g). After heart function examination, mice blood sample was collected for evaluation of serum N-terminal pro-brain natriuretic peptide (NT-proBNP). At the end, part of left ventricular free wall was excised, and hematoxylin and eosin stain was made for histopathological examination. Results The HW/BW, LVEDD and serum NT-proBNP significantly increased in the experiment group compared with those in the sham group (P < 0.01, respectively). The LVPWD, EF and FS significantly decreased compared with the sham group (P < 0.01, respectively). Histopathological examination showed malalignment and rupture of cardiac muscle fibers, hypertrophy and degeneration of myocardial cells, part of which had local or patchy necrosis in left ventricule postoperatively 10 weeks. Conclusion The model of pressure overload-induced heart failure in mice established through suprasternal approach is simple, minimally invasive and reliable.

Citation: ANKang, LIUXu-guang, GAOJian, LVJun-qi, ANJun. A Mouse Model of Minimally Invasive Pressure Overload-induced Heart Failure Estab-lished through Suprasternal Notch Approach. Chinese Journal of Clinical Thoracic and Cardiovascular Surgery, 2016, 23(11): 1099-1102. doi: 10.7507/1007-4848.20160257 Copy

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