The efferent veins of gastroesophageal varices Efferent veins n% Drainaged to superior vena cava 49 69.0 Drainaged to inferior vena cava 3 4.2 Drainaged to both superior and inferior vena cava 19 26.8 Total 71 100 Comment: Most of the gastroesophageal varices had draining veins to the superior vena cava with a rate of 69.0%.