JOHN GREIM / SCIENCE PHOTO LIBRARY JOHN GREIM / SCIENCE PHOTO LIBRARY
Intravenous potassium. Close-up of a bag of potassium solution used for intravenous infusion (drip). Potassium is an essential mineral which, in combination with sodium and calcium, maintains normal heart rhythm, regulates the body's water balance, and is responsible for the conduction of nerve impulses and contraction of muscles. Various drugs contain potassium which may be delivered by intravenous infusion.
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