Sleep apnea is a clinical symptom in sleep-related breathing disorders that are divided into Obstructive Sleep Apnea (OSA), Central Sleep Apnea (CSA) and mixed apnea by analysis using polysomnography. OSA is defined as a cessation of airflow for at least 10 sec during sleeping. The event is obstructive if during apnea there is effort to breathe. On the other hand, in CSA there is no effort to breathe during sleep, which is a less common clinical problem.