Ok, but then you ask me what the relationship between hypertension and sleep apnea is. To start on this topic, let’s discuss the Obstructive Sleep Apnea Syndrome (OSAS). Sleep apnea is a widespread disease little known by the population. It is characterized by upper airways obstruction during sleep, usually accompanied by a drop in blood oxygen saturation, followed by a transient arousal from sleep to breathe. Its main manifestations during sleep include snoring, pauses in breathing, fragmentation of sleep, which lead to daytime incapacitating problems such as excessive daytime sleepiness, fatigue, headache, mood swings, as well as to cognitive disturbances (difficulty concentrating and memorizing). If you have one of these symptoms, your physician can request tests that will monitor your sleep and help him or her diagnose your disorder.