Apical lesions of the left ventricle, ranging from endocardial thickening to aneurysms, are commonly found in Chagas' heart disease. These abnormalities can be identified by ventriculography, two-dimensional echocardiography and radioisotopic studies. Generally, clinical manifestations are limited to arrhythmias and thromboembolic. The lesions are usually small and apparently do not play a role in ventricular dysfunction.