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Obstructive sleep apnea and hypertension: Mechanisms, evaluation, and management

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Abstract

Obstructive sleep apnea (OSA) is a recognized cause of secondary hypertension. OSA episodes produce surges in systolic and diastolic pressure that keep mean blood pressure levels elevated at night. In many patients, blood pressure remains elevated during the daytime, when breathing is normal. Contributors to this diurnal pattern of hypertension include sympathetic nervous system overactivity and alterations in vascular function and structure caused by oxidant stress and inflammation. Treatment of OSA with nasal continuous positive airway pressure (CPAP) abolishes apneas, thereby preventing intermittent arterial pressure surges and restoring the nocturnal “dipping” pattern. CPAP treatment also has modest beneficial effects on daytime blood pressure. Because even small decreases in arterial pressure can contribute to reducing cardiovascular risk, screening for OSA is an essential element of evaluating patients with hypertension.

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Authors and Affiliations

  1. Department of Orthopedics and Rehabilitation, 1300 University Avenue, Madison, WI, 53706, USA

    Barbara J. Morgan

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  1. John M. Dopp
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  2. Kevin J. Reichmuth
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  3. Barbara J. Morgan
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Correspondence to Barbara J. Morgan.

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Dopp, J.M., Reichmuth, K.J. & Morgan, B.J. Obstructive sleep apnea and hypertension: Mechanisms, evaluation, and management. Current Science Inc 9, 529–534 (2007). https://doi.org/10.1007/s11906-007-0095-2

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  • DOI: https://doi.org/10.1007/s11906-007-0095-2

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