Figure 50-30 One-week stroke rate as a function of atheroma grade (N = 189). (Redrawn from Hartmann GS, Yao FS, Bruefach M, et al: Severity of aortic atheromatous disease diagnosed by transesophageal echocardiography predicts stroke and other outcomes associated with coronary artery surgery: A prospective study. Anesth Analg 83:701–708, 1996.)