![]() ![]() When defined as >5 episodes of apnea or hypopnea per hour of sleep, OSA is relatively common, affecting 24% and 9% of middle-aged men and women, respectively. Obstructive sleep apnea (OSA) is caused by upper airway collapse during inspiration and is accompanied by strenuous breathing efforts. Central sleep apnea (CSA) is characterized by apneas secondary to diminution or cessation of thoraco-abdominal respiratory movements (due to dysfunction of central respiratory control mechanisms). Sleep apnea can be central or obstructive. Sleep apnea is defined as repetitive episodes of decreased or total cessation of respiratory airflow during sleep, leading to a fall in oxygen saturation of ≥4% and sleep fragmentation. Customer Service and Ordering Information.Stroke: Vascular and Interventional Neurology.Journal of the American Heart Association (JAHA).Circ: Cardiovascular Quality & Outcomes.Arteriosclerosis, Thrombosis, and Vascular Biology (ATVB). ![]()
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