Obstructive sleep apnea as a risk factor for cardiovascular diseases.

Obstructive sleep apnea (OSA) is a common medical condition that occurs in approximately 5% to 15% of the population. It is usually associated with an increased risk of cardiovascular disease. Diagnosis of OSA is based on polysomnography, and its severity is measured with an apnea-hypopnea index. Most of the adverse effects of OSA on the cardiovascular system are reversible with treatment. In addition to continous positive airway pressure therapy, precautions such as weight loss, avoidance of central nervous system depressants, treatment of nasal congestion and sleeping in the lateral position may help to treat OSA. (Cardiol J 2007; 14: 534-537).