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.
There is high blood pressure also known as hypertension and then low blood pressure. What causes high blood pressure is not known in the case of essential hypertension. Secondary hypertension is caused by underlying primary medical conditions such as heart disease, diabetes and kidney disease.