Arq. Bras. Cardiol. 2019; 113(6): 1090-1091
Correlation between Obstructive Sleep Apnea and Left Ventricular Diastolic Function Assessed by Echocardiography
This Short Editorial is referred by the Research article "Risk of Obstructive Sleep Apnea and Echocardiographic Parameters".
Obstructive sleeP apnea (OSA) is a disease characterized by recurrent upper airway obstruction during sleeP , resulting from the repetitive collapse of these pathways, resulting in hypoxia and sleeP fragmentation. It is a very common disorder, being more common in men, but it can also affect women and children. Its prevalence has been estimated at approximately 14% among men and 5% among women and OSA has been defined in these studies as the presence of an apnea-hypopnea index > 5 events per hour of sleeP , associated with 4% of oxygen desaturation.
OSA is associated with a significant increase in sympathetic activity during sleeP , influencing heart rate and blood pressure. The increase in the sympathetic activity is induced by a number of mechanisms, including chemoreflex stimulation by hypoxia and hypercapnia, baroreflex, endothelial dysfunction, and venous return and cardiac output alterations.
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