Background A rupture of the free wall of the left ventricle is a rarely seen complication of myocardial infarction and represents an absolute cardiac emergency. Case Description We hereby present a case of a 64-year-old patient with a rupture of the free left ventricular wall. The patient was treated in an emergent operation with a novel reconstruction method of the left ventricular wall and was discharged 30 days after the initial operation. Conclusion Left ventricular free wall rupture is rarely described in the literature, which might be because of high mortality in underdiagnosed cases. Therefore, early imaging by echo or computed tomography (CT) is essential for detecting this dangerous condition. Once diagnosed, urgent surgery is mandatory to save the life of the patient.