Which New York Heart Association (NYHA) class indicates no symptoms with normal activity?

The New York Heart Association (NYHA) classification system is a widely used tool for assessing the functional status of patients with heart failure. It categorizes patients based on their symptoms and limitations during physical activities.

Class I in this classification indicates that the patient has no limitations of physical activity. They can engage in normal physical activity without experiencing symptoms such as fatigue, palpitations, or dyspnea. This means that individuals classified as NYHA Class I are asymptomatic under normal conditions and do not experience any discomfort or limitation when participating in everyday activities.

In contrast, the other classes reflect varying levels of physical limitations and symptoms. Class II involves mild limitations of physical activity, Class III indicates that patients have marked limitations and experience symptoms even with less-than-normal activity, and Class IV represents patients who are unable to perform any physical activity without discomfort and may even have symptoms at rest.

Thus, understanding Class I as the category that signifies no symptoms with normal activity is crucial for assessing the severity of heart failure and the quality of life in affected patients.