“Natural beta-blockers” in common foods ... Too much potassium can have harmful effects, including arrhythmias, especially in people with kidney disease or older adults.

This article discusses some nutritional and herbal supplements that act as natural beta-blockers as well as their ... heart ...

Recent American guidelines have already stopped recommending beta-blockers past 1 year after an MI unless there is low LVEF, hypertension, arrhythmia, or another indication for this therapy.