[Pathogenesis of borderline arterial hypertension in young persons]

A total of 1000 students were screened, and borderline arterial, hypertension (BAH) was found in 152 of those. The investigation of microcirculation (by conjunctive biomicroscopy), central hemodynamics and physical stress tolerance showed increased minute blood volume in the absence of adequate arteriole dilatation to be the primary factor in BAH pathogenesis. Physical stress tolerance was similar in BAH and normotensive subjects. BAH subjects showed a specific pattern of cardiovascular response to muscular work.