Maad Rayan Publishing Company Biomedicine Advances 3080-0382 1 1 2024 10 01 A rare case of double chamber left ventricle misdiagnosed as a pseudo-aneurism in cardiac magnetic resonance imaging: Case report 42 45 10.34172/bma.07 EN Rezvaniyeh Salehi https://orcid.org/0000-0002-1240-4809 Rezayat Parvizi Ramin Foroughi Asl Kasra Mirzazadeh Mahsa Zehisaadat Journal Article 10.34172/bma.07 2024 07 02 2024 09 20 A double chambered left ventricle (DCLV) is an extremely rare congenital malformation. In this anomaly left ventricle (LV) is divided into two sub-sections by a muscle bundle or a septum: main left ventricular chamber (MLVC) and accessory chamber. The reported prevalence of DCLV is 0.04%-0.42%; however, the precise prevalence is not determined. In this case, we are reporting a 54 years old man who was referred to cardiologist with a complaint of chest pain. He had a history of systemic hypertension. With regard to echocardiographic findings, the patient was diagnosed to have a left ventricular aneurism or DCLV. For further evaluation, cardiac magnetic resonance imaging (CMRI) was recommended. The results of CMRI revealed pseudo-aneurism with laminated thrombus. Nonetheless, through cardiac surgery DCLV with thick bundles was diagnosed. DCLV is rarely detected in adult patients since, in case of presence, it is mainly diagnosed during infancy or early childhood. Echocardiography is the initial imaging tool for diagnosis of DCLV; however, CMRI improves the chance of accurate diagnosis of the condition by providing a more detailed view.