Renin-angiotensin-aldosterone system (RAAS) inhibitors are a cornerstone in the treatment of heart failure with reduced ejection fraction (HFrEF). Sacubitril/valsartan modulates the neurohormonal axis by inhibiting both angiotensin receptors and neprilysin, and improves neurohormonal balance more than blocking the RAAS alone. The PARADIGM-HF trial validated this new treatment option for patients with HFrEF. Sacubitril/valsartan was also more effective than enalapril in slowing disease

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... n by decreasing the risk of worsening heart failure requiring hospitalization or emergency admission and the need for intensified therapy, heart failure devices or cardiac transplantation. More than 70% of patients included in PARADIGM-HF were in NYHA class II, and overall, the results indicate that sacubitril/valsartan should be started in the earliest symptomatic stages of the disease. As PARADIGM-HF has excellent robustness for a cardiovascular trial, sacubitril/valsartan has been included as a new treatment option with a strong level of recommendation in the main international guidelines. This expert task force proposes a practical guide to the use of this new drug that has been endorsed by the Working Group on Heart Failure of the Portuguese Society of Cardiology.