New York Heart Association Classification
The New York Heart Association Classification was developed in 1964 as functional and therapeutic classification for patients with cardiac disease.
Class I
No limitation of activities and no symptoms from ordinary activities.
Class II
Slight, mild limitation of activity; they are comfortable at rest or with mild exertion.
Class III
Marked limitation of activity; they are comfortable only at rest.
Class IV
Confined to bed or a chair; any physical activity brings on discomfort and symptoms occur at rest.
Reference
The Criteria Committee of the New York Heart Association. Nomenclature and Criteria for the Diagnosis of Diseases of the Heart and Great Vessels. 9th ed. Boston, Mass: Little, Brown & Co; 1994: 253-256.
