Changes in the Cardiovascular Function in Healthy Subjects and Patients with Ischemic Heart Disease during Sleep |
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Authors: | D. Žemaitytė G. Varoneckas I. Duoneliene R. Daukšis |
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Affiliation: | (1) Institute of Psychophysiology and Rehabilitation, Kaunas Medical University, Palanga, Lithuania |
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Abstract: | The purpose of this study was to investigate the autonomic regulation of the cardiovascular system during sleep in health and disease. The examination included 396 subjects: 29 healthy subjects and 367 patients with ischemic heart disease, of whom 149 had left-ventricular failure and 214 hypertension. Sleep quality and the presence of obstructive sleep apnea syndrome were evaluated by polysomnography; the character of autonomic regulation of cardiac rhythm and hemodynamics was determined by computerized testing during night sleep and an active orthostatic test immediately before and after sleep. The results permitted the authors to conclude that autonomic regulation may be restored to various degrees in health and disease, depending on the pathology level. The sleep quality influenced the restoration of hemodynamics more than that of the cardiac rhythm, mainly when obstructive sleep apnea syndrome was present. |
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