Table 4. Heart failure functional NYHA classification.

NYHA: New York Heart Association.
Class I	No difficulty with usual physical activities, with no manifestation of dyspnoea, fatigue or palpitations.
Class II	Slight limitation for usual physical activities. Patient asymptomatic at rest; in physical activity, expression of fatigue, dyspnoea and palpitations.
Class III	Significant limitation of physical activities, although comfortable at rest. Symptoms of dyspnoea, fatigue and palpitations on exertion.
Class IV	Symptoms present even at rest, and discomfort with any physical activity.