Class | Description |
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I | Ordinary physical activity, such as walking or climbing stairs, does not cause angina. Angina occurs with strenuous, rapid, or prolonged exertion at work or recreation. | II | Slight limitation of ordinary activity. Angina occurs on walking or climbing stairs rapidly; walking uphill; walking or stair climbing after meals, in cold, or in wind; under emotional stress; only during the few hours after awakening; or walking more than two level blocks and climbing more than one flight of stairs at a normal pace and in normal conditions. | III | Marked limitation of ordinary physical activity. Angina occurs on walking one to two level blocks and climbing one flight of stairs in normal conditions at a normal pace. | IV | Inability to carry on any physical activity without discomfortangina symptoms may be present at rest. |
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SOURCE: Campeau, L: Grading of Angina Pectoris [letter]. Circulation 54(3), 522. Copyright 1976, American Heart Association.