Epidemiological and observational studies suggest that sleep disordered breathing is associated with the subsequent development of hypertension and ultimately with cardiovascular consequences. It may therefore be assumed that continuous positive airway pressure not only avoids sleep related symptoms but could also mitigate cardiovascular consequences. Short-term studies have revealed a drop in blood pressure, especially in more severe, symptomatic cases of obstructive sleep apnea Two recent studies have reported that non-sleepy obstructive sleep apnea is associated with an absence of reduced blood pressure after continuous positive airway pressure treatment. This suggests that this group of patients is less susceptible to the consequences of apneas even in those with mild-moderate hypertension or other cardiovascular disorders. However, patients with severe cardiovascular disease or higher number of obstructive events, continuous positive airway pressure treatment. should be seriously considered.