Assertion: magnesium sulfate's magnesium | /r/CapableOf | add to β-blocker treatment
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text: Moreover, the meta-analysis of five randomized controlled trials also suggested that intravenous magnesium added to β-blocker treatment did not decrease the risk of atrial arrhythmia compared to β-blocker alone and was associated with more adverse effects (bradycardia and hypotension) (61).