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Figure 2 Using quality-adjusted survival as the outcome measure, at low baseline gradients and in older patients, CABG alone is the preferred strategy for management of a patient with mild, asymptomatic aortic stenosis undergoing coronary bypass surgery. CABG/AVR is favored for patients of all ages with a valve gradient over 50 mm Hg, and for patients under age 70 once their valve gradient reaches about 28 mm Hg. This assumes a constant rate of AS progression of 5 mm Hg/year. Abbreviations as in Figure 1.