DOI: https://doi.org/10.36347/sjmcr.2026.v14i11.028

Pages: 2529-2532

Persistent left superior vena cava (PLSVC) is a rare congenital malformation, generally benign and most often asymptomatic. In the majority of cases, it is discovered incidentally during radiological or echocardiographic investigations performed for other reasons. We report the case of an adult female patient in whom this anomaly was identified during the etiological workup of bradycardia. Mrs. K. F., a 49-year-old woman with no history of surgery or known cardiovascular risk factors, was admitted for persistent fatigue. Clinical examination revealed marked bradycardia at 39 beats per minute, with no other notable clinical signs. The electrocardiogram confirmed sinus bradycardia. Chest X-ray showed an enlarged mediastinal silhouette. Transthoracic echocardiography (TTE) revealed a dilated coronary sinus, associated with moderate dilatation of the pulmonary artery and its branches. Given these findings, a thoracic CT angiography was performed, which confirmed the presence of a persistent left superior vena cava. The thoracic aorta appeared morphologically and dimensionally normal across all its segments.