A Case of Persistent Left Superior Vena Cava with Interruption of Inferior Vena Cava

Failure in regression of fetal left common cardinal vein, commonly referred to as persistent left superior vena cava, is one of the most frequently encountered anomalies of the systemic venous return. We experienced a case of persistent left superior vena cava in a 60-year-old male who presented with exertional dyspnea and intermittent cough for 1 year. We found that the persistent left superior vena cava drained into right atrium via markedly dilated coronary sinus in transthoracic and contrast transesophageal echocardiography. The patient had also interruption of inferior vena cava, confirmed by venogram during right heart catheterization, so that the blood of inferior vena cava drained into left superior vena caba via hemiazygos vein. The patient improved with medical treatment and was discharged.