OBJECTIVE: This study used gated myocardial perfusion imaging(G-MPI) to assess the clinical value of Xinmailong injection in chronic congestive heart failure(CHF).METHODS: A total of 102 CHF patients were randomly divided into the control group(n=51) and the Xinmailong group(n=51). Patients in the control group were routinely treated. Patients in the Xinmailong group were additionally treated with Xinmailong injection in addition to routine treatment. Before and 3 months after treatment, G-MPI was used to determine changes in the left ventricular ejection fraction(LVEF), left ventricular end-diastolic volume(LVEDV) and left ventricular end-systolic volume(LVESV). Fourteen days after treatment, changes in plasma brain natriuretic peptide(BNP) levels were determined.RESULTS: Before treatment, there were no significant differences in LVEF, LVEDV, LVESV, and BNP levels between the two groups(all P>0.05). After treatment, LVEDV, LVESV, and BNP levels were significantly lower, and LVEF was significantly higher in the Xinmailong group than in the control group(all P