Upper Airway Stimulation versus Positive Airway Pressure Impact on Blood Pressure and Sleepiness Symptoms in Obstructive Sleep Apnea.

PAP showed greater improvement in BP, potentially reflecting enhanced ability of PAP to exert beneficial mechanical intrathoracic cardiac and vascular influences. BP measurement error in the UAS group may also have accounted for findings. Greater improvement in sleepiness symptoms were noted in UAS compared to PAP.