My doctor has not checked me for my mineral levels, they seem to be more interested in handing out drugs before a thorough check up is done.
I have both the arrythmias (SVT) and ectopics and I am also aware from seeing a nutritionist and researching the deficiency symptoms that I am low on the magnesium and pottasium. Many people tend to be imbalanced with their sodium pottasium levels. It depends on the diet, the modern diet tends to contain too much sodium and this causes an imbalance especially if you have a weakness in your kidney area. But of course we must be careful with this electrolyte balance as it is a delicate balance. I agree that I think that its important to get most of your mineral and vitamin needs from your diet and to take it slowly with supplements.