Esophageal varices, causes, symptoms and how to overcome. What is Esophageal Varices? Esophageal varices are a disease
characterized by widening of the venous blood vessels in the lower esophagus. Esophageal
varices occur when there is obstruction of blood flow to the liver. Often blood
flow is slowed by scarring in the liver caused by liver disease. Because
vascular resistance in the liver sinusoid is low, an increase in portal venous
pressure of less than 10 mmHg will proximal vein to the block and increase
capillary pressure in the organs drained by the obstructed venous vessels, one
of which is the esophagus.