Effects of methyl protodioscin on i and ATPase activity incardiomyocytes and analysis of mechanisms Effect of Yiqi Huoxue Recipe on protein and mRNA expression of SERCA2a and NCX in chronic heart failure rats Effect of astragalus on calcium accumulation and SERCA2agene expression in myocardial tissues in rats with pressureoverload-induced left ventricular hypertrophy Effect of Yiqi Huoxue Recipe on protein and mRNA expression of SERCA 2a and NCX in chronic heart failure rats