Table 1.

Classification of HF according to A) NYHA functional classification and B) ejection fraction

A) HF ACCORDING TO NYHA CLASS
NYHA CLASS	DESCRIPTION	EXAMPLES OF ACTIVITIES THAT CAN BE PERFORMED WITHOUT PRODUCING SYMPTOMS
I	Asymptomatic: ordinary physical activity does not cause undue breathlessness, fatigue, or palpitations	Carry objects > 36.5 kg (80 lb) or carry objects > 11.5 kg (25 lb) up 8 steps Shovel snow, spade soil Ski, play basketball Jog or walk 8 km/h
II	Mild symptoms: comfortable at rest, but ordinary physical activity results in undue breathlessness, fatigue, or palpitations	Sexual intercourse without stopping Garden, rake, weed Play golf, dance the fox trot Walk 6 km/h on level ground
III	Moderate symptoms: comfortable at rest, but less than ordinary physical activity results in undue breathlessness, fatigue, or palpitations	Mop floors, make bed Push lawn mower Shower and dress without stopping Walk 4 km/h
IV	Severe symptoms or symptoms at rest: unable to carry on any physical activity without discomfort	Cannot perform any of the above without symptoms

B) HF ACCORDING TO EJECTION FRACTION
CLASSIFICATION		LVEF
HF with reduced ejection fraction		≤ 40%
HF with mildly reduced or mid-range ejection fraction		41%-49%
HF with preserved ejection fraction		≥ 50%
HF with improved ejection fraction		Baseline ≤ 40% with a later measurement that increased by ≥ 10% from baseline to > 40%

HF—heart failure, LVEF—left ventricular ejection fraction, NYHA—New York Heart Association.
Data from Goldman et al¹ and Bozkurt et al.²