Obstructive Sleep Apnea

Reports outline obstructive sleep apnea study results from Calvin College

Published in Cardiovascular Week, May 25th, 2009

According to a study from the United States, "The present study investigated whether autonomic control of the heart for persons with low and high levels of sleep apnea/hypopnea differed between sleep stages and across the sleep period. Electrocardiography and impedance cardiography of 24 patients referred to polysomnography were recorded through the night."

"A mixed repeated-measures and between-subjects, quasi-experimental design was utilized. Heart period, high frequency heart rate variability, and pre-ejection period were computed, respectively, as measure of heart rate and estimates of parasympathetic and sympathetic control. The cardiac and autonomic measures for...

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Source: Cardiovascular Week (2009-05-25)

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