Persistent Left Superior Vena Cava

https://obgynkey.com/anomalies-of-systemic-and-pulmonary-venous-connections/

KEY POINTS    Persistent Left Superior Vena Cava

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   Persistent LSVC is thought to result from failure of the left anterior and common cardinal veins to involute.

   LSVC joins the coronary sinus and drains into the right atrium in 92% of cases or into the left atrium in the remainder of cases.

   Identifying LSVC can be achieved in four transverse planes and in one longitudinal plane; the four-chamber view, a plane just posterior to the four-chamber view, the three-vessel-trachea view, the left brachiocephalic view, and a left parasagittal view.

   Increased nuchal translucency has been shown in 29% of fetuses with LSVC.

   Heterotaxy accounts for the most common associated cardiac malformation with LSVC.

   Ventricular septal defects and coarctation of the aorta were among the most common associated cardiac malformations in the nonheterotaxy group with LSVC.

   Chromosomal anomalies were reported in 9% of LSVC in one study.

   Isolated LSVC does not seem to be associated with clinical problems postnatally.