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.
âPortal hypertension develops when there is resistance to portal blood flow and is aggravated by increased portal collateral blood flow. The resistance most often occurs within the liver (as is the case in cirrhosis), but it can also be prehepatic (eg, portal vein thrombosis) or posthepatic (eg, Budd-Chiari syndrome).