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高血压治疗新思路:增加镁的摄入或有助于降压

2016-08-06 iang 心血管时间

镁是人体的基本元素,很多基础研究表明镁可能在血压调节中起着重要的作用,长期以来,研究人员也一直在探索镁在预防高血压中潜在价值,但是,目前临床研究结果存在争议,尚无定论。最近一项荟萃分析显示增加镁摄入明显降低收缩压和舒张压,但所纳入的研究在研究质量、样本数量和被纳入对象临床特点等方面均存在明显异质性,因此缺乏说服力。为了进一步明确并可靠地阐明补镁与预防高血压之间的关系,来自印第安纳大学的 Zhang

镁是人体的基本元素,很多基础研究表明镁可能在血压调节中起着重要的作用,长期以来,研究人员也一直在探索镁在预防高血压中潜在价值,但是,目前临床研究结果存在争议,尚无定论。


最近一项荟萃分析显示增加镁摄入明显降低收缩压和舒张压,但所纳入的研究在研究质量、样本数量和被纳入对象临床特点等方面均存在明显异质性,因此缺乏说服力。


为了进一步明确并可靠地阐明补镁与预防高血压之间的关系,来自印第安纳大学的 Zhang 博士等只针对随机对照试验的荟萃分析,研究发现,增加镁的摄入有助于降压,研究结果发表在 Hypertension 杂志上。


研究共纳入 34 项随机对照双盲试验,共有 2028 名正常血压或高血压人群,其中 1010 名接受补镁治疗,另外 1018 名接受安慰剂治疗。研究通过随机效应计算加权的血压和血清镁变化平均值,并分析两者之间的关系。


研究结果表明,与安慰剂相比,补镁 368 mg/d 平均持续时间 3 个月收缩压和舒张压分别下降 2 mmHg 和 1.78 mmHg,血清镁水平则上升 0.05 mmol/L。剂量和时间反应分析显示,补镁 200 mg/d 或持续补镁 1 月即可显著升高血清镁水平,随着镁的升高,收缩压呈非线性下降而舒张压呈线性下降。


分层分析表明,高质量或补镁依从性较高的临床研究中血压下降幅度较大,而补镁对血清镁影响不同取决于试验开展的区域、摄入镁的配方以及镁的基线水平。


研究得出,补镁与降低血压之间存在因果关系。尽管本研究对年龄、性别、研究质量、依从性等多个方面进行分层,但仍可能遗留异质性因素,未来需要进一步研究证实最佳补镁治疗的降血压效果。

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    2017-06-24 晓辰
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    2016-08-07 biyefy

    这个研究题目是什么?

    0

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    2016-08-07 古道西风659

    很多顽固性原发性高血压,当常规用药效果不佳的时候,确实应该换个角度看问题

    0

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    2016-08-06 蜗小牛的天空

    医学就是要不断的发展,为病人更好的解决问题,不错的一个新思路

    0

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