By Dematteis, Maurice Julien, Cecile; Guillermet, Christiane; Sturm, Nathalie; Lantuejoul, Sylvie; Mallaret, Michel; Levy, Patrick; Gozal, Evelyne Rationale: Intermittent hypoxia, a hallmark of sleep apnea, is a major factor for hypertension and impaired vasoreactivity.