[Persistent left superior vena cava. Apropos of 2 cases]. / Veine cave supérieure gauche persistante. A propos de deux observations.

Double superior vena cava with persistence of a left superior vena cava is rarely encountered. The prevalence in the general population is 0.3% but may reach 3 to 10% in patients with inborn heart diseases. There are usually no clinical signs and the malformation is usually discovered fortuitiously. We describe the features of two cases observed in our institution and reviewed the literature on the subject.