Stage

Symptoms

I

Their physical activity has not changed. The individual's physical exertion does not result in fatigue, palpitations, or shortness of breath.

II

Physical activity is slightly restricted for the individual. When the person is at rest, he or she feels at ease.

Their regular physical exertion causes fatigue, palpitations, and shortness of breath.

III

Physical activity is severely restricted for the individual. The individual is at ease while resting. Physical activities that should be easier on their bodies than their regular jobs produce weariness, palpitations, or shortness of breath.

IV

The individual is unable to perform any task without discomfort. At rest, the person has signs of heart failure. Their discomfort rises when they undertake any type of physical exercise.