While getting enough sleep is key to good health, new research suggests that daytime naps may be linked to cardiovascular risks. Read on to learn more about the link between daytime sleepiness, prolonged naps, and cardiovascular risks.

Many people worry about what causes sleepiness and fatigue. In fact, excessive sleepiness or sleepiness during the day can have many causes. Most cases of excessive sleepiness are secondary and are often associated with brain tumors, encephalitis, physical damage to the central nervous system, Parkinson's disease, head trauma, and various genetic disorders.

signs of sleep apnea usually maintain airway patency when awake but when deep sleep is obstructed, leading to deep sleep being interrupted by increasing respiratory obstruction and stimulating the patient to wake up to enter light sleep. This awakening helps the patient's airway to re-establish a normal state and is often accompanied by a long inspiration to compensate for the lack of oxygen.