Double superior vena cava (persistent left superior vena cava draining into the coronary sinus) - case report

A 24-year-old woman with no relevant cardiac history presented for evaluation of palpitation and chest pain. Electrocardiography showed non-specific ST-T wave changes in inferior leads. Transthoracic echocardiography showed a dilated coronary sinus. The thoracic computed tomography (CT) scan with contrast showed the normal right superior vena cava and the persistent left superior vena cava (PLSVC) draining into the right atrium through the coronary sinus. Transthoracic echocardiography - including agitated saline infusion to both antecubital veins - and computed tomography are important non-invasive diagnostic tools for accurate diagnosis of this rare congenital venous malformation. This malformation is quite frequently found, especially with the advent of cardiac ultrasound or CT, magnetic resonance imaging (MRI).