Which NYHA class describes no limitation of physical activity?

• A. Class 0
• B. Class 1
• C. Class 2
• D. Class 3

Answer: (A)

No limitation of physical activity is described by Class I in the NYHA functional classification. This means a person with heart failure can perform ordinary activities without symptoms like fatigue, shortness of breath, or palpitations. There isn’t a separate Class 0 in standard NYHA; if you see a 0, it’s not used in clinical practice. The other classes represent increasing limitations: Class II means slight limitation with ordinary activity causing symptoms, Class III indicates marked limitation with less than ordinary activity causing symptoms, and Class IV means symptoms are present at rest.