Gerbode defect (DG) is a very rare condition that consists of a communication from the left ventricle (LV) to the right atrium (RA) due to a septal defect, which may be congenital or acquired, secondary to endocarditis, valve replacement surgery, acute myocardial infarction, or chest trauma. A shunt is produced from a high-pressure chamber to a low-pressure chamber, increasing the volume and pressure of the right chambers, which can produce mixed circulatory failure due to dysfunction of these cavities and low output due to LV systolic volume. Cardiac ultrasound is the gold standard in the study and diagnosis of this pathology. Treatment can be by surgical or percutaneous intervention. The case of a patient with Gerbode defect secondary to valve replacement will be presented, where the ultrasound diagnosis was essential to perform a surgical repair in the ward.