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Moreover, the observation group had significantly lower BNP and TNF-alpha levels and mean pulmonary arterial pressure than the control group. After intervention, the echocardiographic parameters left ventricular ejection fraction (LVEF), cardiac output (CO), and stroke volume (SV) in both groups were significantly higher than those before intervention, and the observation group had significantly higher LVEF, SV, and CO than the control group after intervention. CONCLUSIONS Beraprost sodium combined with sildenafil for left heart failure