Abstract

Background: Sacubitril/valsartan, an angiotensin receptor-neprilysin inhibitor, has demonstrated survival benefit and reduces heart failure hospitalization compared with enalapril in patients with heart failure and reduced ejection fraction. However, its efficacy in real-world practice in Japan remains unknown.Methods and Results: We initiated sacubitril/valsartan treatment for 37 patients (median age 68 years; median left ventricular ejection fraction 37%) between August and November 2020. Within 3 months, sacubitril/valsartan was discontinued in 3 patients due to symptomatic hypotension or worsening heart failure. Two patients were hospitalized due to worsening heart failure, with one of these patients undergoing percutaneous mitral valve repair. Three patients received scheduled non-pharmacological treatment: 1 received cardiac resynchronization therapy (CRT), 1 received CRT and underwent transcatheter aortic valve implantation, and 1 underwent left ventricular assist device implantation. Of the 30 patients who continued sacubitril/valsartan for 3–6 months without additional non-pharmacological therapy, there was a tendency for a decrease in N-terminal pro B-type natriuretic peptide concentrations (baseline vs. after 3–6 months ARNI treatment; median 733 vs. 596 pg/mL; P=0.097) and an increase in left ventricular ejection fraction (median 37% vs. 39%; P=0097).Conclusions: Sacubitril/valsartan therapy with a lower initial dose was safe and may be effective in Japanese heart failure patients in a real-world setting. Further evaluation of optimal patient selection and clinical management using sacubitril/valsartan is warranted.

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