Ten cases are reported in which the diagnosis of cardiac aneurysm was made during life. It was based primarily on physical examination. The area of pulsation was situated more craniad than the usual apical thrust caused by an hypertrophied left ventricle. Furthermore, the history and the electrocardiographic findings indicated a preceding cardiac infarction, and other causes for such a forceful cardiac thrust could be excluded, or it developed subsequent to a coronary artery occlusion. The radiological examination revealed characteristic features only in half the cases. Pathognomonic findings in the roentgenogram occurred when the aneurysmal formation involved the basal or middle portions of the left ventricle. Some of the following findings occurred along a part of the left lower cardiac contour: a localized bulge; a sudden kink; a centrifugal, systolic pulsation; calcification, shell-like in arrangement. The esophagus sometimes revealed in its lower 3d either an impression from in front or a shallow deviation dorsad. The prognostic outlook in the presence of cardiac aneurysm is relatively favorable both as to expectation of life and to effort capacity.