“…In that study, patients with Chagas disease had maximum systolic flow, peak flow during early LV filling, and peak flow during atrial contraction similar to patients in the control group, thus demonstrating, in a noninvasive manner, that the increase in LV end-diastolic volume was the main adaptive mechanism that made it possible to maintain flow and stroke volume in patients with severe LV systolic dysfunction. 25 Notwithstanding the increasing use of 3D echocardiography to estimate volumes and LVEF in various pathologies, to our knowledge, there are no studies that have specifically evaluated the superiority of 3D echocardiography in relation to 2D echocardiography in patients with Chagas disease, in relation to diagnostic capacity, classification in degrees of left ventricular systolic dysfunction, or in terms of prognosis of major cardiac outcomes, such as ventricular arrhythmias or mortality.…”