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.
I. Hypertension, or high blood pressure, is classified as either primary or secondary. A. Primary hypertension, also called essential hypertension, may be the result of the interaction of many mechanisms that raise the blood volume, cardiac output, and/or peripheral resistance. B. Secondary hypertension is the direct result of known, specific diseases. II.