[Study on establishing animal model of myocardial infarction of blood-stasis and Xin-qi deficiency syndrome or blood-stasis and Xin-yang deficiency syndrome type].

OBJECTIVE

To investigate the method for establishing animal model of integrative medical disease/ syndrome and its evaluation.

METHODS

Rat myocardial (heart failure) model was established by anterio-descending coronary arterial ligation, and treated by nitric oxide synthase inhibitor 9-12 weeks after operation to induce hypertension and aggravate heart failure. The model rat was observed 12 weeks to collect the information of four-diagnosis, for visceral qi-blood and excess-deficiency syndrome differentiation in combining with the eight-principal syndrome differentiation according to the standard of deficiency syndrome and blood-stasis syndrom issued by Chinese Association of integrative medicine.

RESULTS

After modeling, the model rats revealed ascended ST segment and abnormal Q-wave in ECG, with the visceral ratio, left ventricular area and myocardial collagen content significantly more than those in the sham-operative group (P < 0.01), showing a blood-stasis syndrome. Besides, Xin-qi deficiency syndrome, exhibiting as quickened heart rate, shortened swimming time and lowered cardiac function, appeared in the model rats (P < 0.01), which was aggravated in the late stage due to the increased blood pressure and deteriorated cardiac function, even revealed the manifestation of Yang-deficiency syndrome as low body temperature and polyuria.

CONCLUSION

The basic thinking path of TCM animal disease/syndrome model establishment and evaluation should adopt the normative, mature and unified standard and methods formed in clinical and experimental study of integrative medicine.