The Phase Gate Review methodology improves project effectiveness by reviewing all stages of the project from the initial selection process through the entire process of development to the final stages of closure.
Idiopathic hypertension redirects here. For the condition of raised blood pressure within the skull, see Idiopathic intracranial hypertension. Essential hypertension (also called primary hypertension or idiopathic hypertension) is the form of hypertension that by definition has no identifiable cause.
This is called portal hypertension. Less common causes of portal hypertension and esophageal varices include blood clots in the veins leading to and from the liver and schistosomiasis. Schistosomiasis is a parasitic infection that can clog up the liver, causing pressure to back up in the portal vein.