Objective: To elucidate the effects of Wenyangzhenshuai granule on expression of extracellular signal-regulated kinase ½ (ERK1/2) and 5 (ERK5) in the myocardial tissue using a rabbit model of adriamycin-induced chronic heart failure. Materials and methods: Rabbits were divided into heart failure positive control, adriamycin injection, and adriamycin injection with Wenyangzhenshuai treatment (low, medium and high dose) groups. Cardiac function and cardiac hypotrophy were measured in all groups. Besides, myocardial expression of ERK1/2 and ERK5 ...