premature ventricular depolarizations
"I find my pvc's respond better to increasing my magnesium.  I take it at night it also helps me sleep better and has a easy laxative affect in the am.  I just converted over from the 50 mg extentabs to 25 mg twice a day,  I'm hoping that the new regimen may be a little better in controlling this soccer game I have going on in my chest. I really think that the magnesium helps the most.  If I don't have better results, I may try just the magnesium without the metoprolol and see if there is a difference."