Emergency and Critical Care Medicine;
Juntendo University Nerima Hospital;
Nerima-ku 177-8521;
Tokyo;
Japan;
Geriatric Medicine;
Kanazawa Medical University Himi Municipal Hospital;
Himi-shi 935-8531;
Toyama;
Japan;
Angiotensin receptor blocker and neprilysin inhibitor; Chronic heart failure; Renin-angiotensin-aldosterone-system; Sympathetic nervous system; Natriuretic peptide; Sacubitril/valsartan;