Table 1. Classification of heart failure based on LVEF.

Type of HF	HFrEF		HFpEF	HFnEF
	HFsrEF	HFmrEF
CRITERIA
1	Symptoms ± signs	Symptoms ± signs	Symptoms ± signs	Symptoms ± signs
2	LVEF ≤ 40%	LVEF 41-49%	LVEF 50-59%	LVEF ≥ 60%
3	–	–	Objective evidence of cardiac structural and functional abnormalities consistent with spontaneous or provokable increased LV filling pressures; and elevated natriuretic peptides*	Objective evidence of cardiac structural and functional abnormalities consistent with spontaneous or provokable increased LV filling pressures; and elevated natriuretic peptides*

HF, heart failure; HfmrEF, heart failure with mildly reduced ejection fraction; HfnEF, heart failure with normal ejection fraction; HfpEF, heart failure with preserved ejection fraction; HFrEF, heart failure with reduced ejection fraction; HfsrEF, heart failure with severely reduced ejection fraction; LV, left ventricular; LVEF, left ventricular ejection fraction.

* B-type natriuretic peptide ≥ 35 pg/mL and/or N-terminal pro-B type natriuretic peptide ≥ 125 pg/mL.