Editorial

Abstract
The pathogenesis of essential hypertension, is still unknown despite extensive research during the past 25 years. These studies have indicated that there are neurogenic, electrolyte, endocrine, and renal changes in pathophysiology that may have pathogenetic significance for essential hypertension. These changes may be interpreted to mean that essential hypertension is a generic classification consisting of several distinct types of hypertension or that it is a single clinical entity with various degrees of functional alteration in different body systems-. The former is presently the majority opinion, although only future research can determine which viewpoint is valid.