Left ventricular aneurysm is rare. It can be spontaneous or acquired, appearing most often after a transmural myocardial infarction but can also follow cardiac operations, trauma, inflammation or infection [1]. We report the first case of a patient initially referred by the cardiology department of the CHU-ME for the surgical management of a large pericardial effusion whose immediate operative consequences were complicated by significant hemorrhage through the pericardial drain, prompting an emergency sternotomy, surgical exploration of which revealed a ruptured left ventricle aneurysm in a 14-year-old boy. In conclusion surgical repair of left ventricular aneurysm can be performed with acceptable results.