What is the new york association classification (NYHA) of heart failure?

Class I (pt with HF with no limitation of physical activity, no fatigue/palpitation/dyspnea/angina) Class II (slight limitation with physical activity) Class III (marked limitation with activity, comfortable at rest) Class IV (inability to carry out any physical activity without discomfort All are at risk for death (34% of NYHA class I and II die, 42% of class III and IV die)