New York Heart Association functional classification of HF

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New York Heart Association functional classification of heart failure based on severity of symptoms and physical activity.

Class INo limitation of physical activity. Ordinary physical activity does not cause undue breathlessness, fatigue, or palpitations.
Class IISlight limitation of physical activity. Comfortable at rest, but ordinary physical activity results in undue breathlessness, fatigue, or palpitations.
Class IIIMarked limitation of physical activity. Comfortable at rest, but less than ordinary activity results undue breathlessness, fatigue, or palpitations.
Class IVUnable to carry on any physical activity without discomfort. Symptoms at rest can be present. If any physical activity is undertaken, discomfort is increased.

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