Figure 1a. Images in a 68-year-old man after anterior myocardial infarction who was transferred for preoperative evaluation of left ventricular anatomy and function at electron-beam CT prior to anterior aneurysmectomy. (a) Electron-beam CT section along short axis of the heart with manually drawn endocardial contours at end diastole (left) and end systole (right) for determining global left ventricular stroke volume (cine protocol). (b) Electron-beam CT section (top) through the aorta transverse to its axis at the level of the pulmonary bifurcation and corresponding attenuation-time curve (bottom) for calculating antegrade stroke volume (flow protocol).