Role of potassium in regulating blood flow and blood pressure.

@article{Haddy2006RoleOP,
  title={Role of potassium in regulating blood flow and blood pressure.},
  author={Francis J. Haddy and Paul Michel Vanhoutte and Michel F{\'e}l{\'e}tou},
  journal={American journal of physiology. Regulatory, integrative and comparative physiology},
  year={2006},
  volume={290 3},
  pages={
          R546-52
        }
}
Unlike sodium, potassium is vasoactive; for example, when infused into the arterial supply of a vascular bed, blood flow increases. The vasodilation results from hyperpolarization of the vascular smooth muscle cell subsequent to potassium stimulation by the ion of the electrogenic Na+-K+ pump and/or activating the inwardly rectifying Kir channels. In the case of skeletal muscle and brain, the increased flow sustains the augmented metabolic needs of the tissues. Potassium ions are also released… 

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