Left ventricular pseudoaneurysms and true aneurysms are two possible complications of myocardial infarction. However, while pseudoaneuryms require urgent surgical resection, true aneuryms can often be managed medically, making imperative an accurate diagnosis.The authors describe a case of a delayed rupture of a true aneurysm that was contained and gave rise to a pseudoaneurysm inside of a true aneurysm. The echocardiography allowed the differential diagnosis for a timely surgical intervention which resulted in the patient's full recovery.