The New York Heart Association and the Canadian Cardiovascular Society have described grading criteria for levels of angina. Angina that occurs with unusually strenuous activity or on walking or climbing stair after meals is class:

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Angina that occurs with unusually strenuous activity or on walking or climbing stair after meals is classified as Class II angina, which is defined as angina that occurs with moderate exertion. Class I angina occurs only with prolonged or strenuous physical activity, Class III angina occurs with less than ordinary activity, and Class IV angina occurs at rest.