By downregulating the expression of the pro-apoptotic protein Bax, upregulating the anti-apoptotic protein Bcl-2 expression and the Bcl-2/Bax ratio, Yiqi Huoxue formula can improve the cardiac function of rats with myocardial infarction, thereby alleviating the myocardial apoptotic injury and protecting the heart (109). Here, BAX is linked to myocardial infarction.