In reviewing this case, see this flowchart, depicting the European Society of Cardiology algorithm for the management of chronic heart failure with reduced ejection fraction (HFrEF)[1]:
[1] Ponikowski P et al. 2016 ESC guidelines for the diagnosis and treatment of acute and chronic heart failure. The task force for the diagnosis and treatment of acute and chronic heart failure of the European Society of Cardiology (ESC). European Heart Journal 2016;37:2129-2200.