Abstracts
Purpose
β-Blocker use has been controversial for a long time in the management of hypertensive patients with obstructive sleep apnea (OSA). The aim of present study was to compare the effects of metoprolol on BP lowering with amlodipine in hypertensive OSA patients.
Methods
Hypertensive subjects with OSA were randomly assigned to metoprolol and amlodipine groups, receiving 12 weeks of oral either metoprolol (47.5 mg once daily) or amlodipine (5 mg once daily) treatment. At baseline and after the 12-week treatment period, 24-h ambulatory blood pressure monitoring was performed in both groups.
Results
Both of metoprolol and amlodipine treatments significantly lowered 24-h blood pressure (BP) (from 143/88 to 132.3/81.6 mmHg; from 141.3/84.5 to 133.7/80.8 mmHg), daytime BP (from 146/90.2 to 136.4/84.6 mmHg; from 145.1/87.6 to 138.2/84.1 mmHg), and nighttime BP (from 139.1/83.9 to 125.7/76.2 mmHg; from 134.5/78.5 to 125.8/74.1 mmHg) (all P < 0.05). But there were no significant differences between the groups in BP variability (P > 0.05). Besides, metoprolol significantly reduced daytime heart rate (HR) (P < 0.05), while 24-h and nighttime HR values had no remarkable changes compared with baseline (P > 0.05).
Conclusions
Metoprolol had similar therapeutic effects on BP lowering as amlodipine and could not decrease HR during the nighttime in hypertensive patients with OSA.
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Funding
National Basic Research Program of China (973 program), National Natural Science Foundation of China, Heilongjiang Province Outstanding Youth Foundation, the Technology Research and Development Program of Heilongjiang Province, and Chang Jiang Scholar Candidates Program for Provincial Universities in Heilongjiang provided financial support in the form of Nos. 2014CB542401, 81470462, 81670297, JC201208, GA14C101, and 2013CJHB001. The sponsor had no role in the design or conduct of this research.
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The study was approved by the Ethics Committee of the First Affiliated Hospital of Harbin Medical University (ClinicalTrials.gov identifier: NCT02408172)
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The authors declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Shi, J., Yuan, Y., Deng, X. et al. Metoprolol has a similar therapeutic effect as amlodipine on BP lowering in hypertensive patients with obstructive sleep apnea. Sleep Breath 23, 227–233 (2019). https://doi.org/10.1007/s11325-018-1688-5
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DOI: https://doi.org/10.1007/s11325-018-1688-5