Figure 4  .

Estimated survival and event-free survival curves after three years of follow up (Kaplan-Meier) for the two study groups. The medical group consisted of 24 patients with an equivocal left main coronary artery stenosis in whom bypass surgery was deferred on the basis of a left main coronary artery FFR of ⩾ 0.75. The surgical group consisted of 30 patients with an equivocal left main coronary artery stenosis in whom bypass surgery was performed on the basis of a left main coronary artery FFR of < 0.75. Numbers below the x axis represent patients at risk at one, two, and three years of follow up.