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Hyperkalemia: pathophysiology, risk factors and consequences.

Robert W Hunter1, Matthew A Bailey1

  • 1British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|December 5, 2019
PubMed
Summary

Hyperkalemia, or high potassium levels, results from impaired kidney function and can increase mortality risk. Newer potassium binders may help manage this condition and improve medication adherence.

Keywords:
aldosteronearrhythmiahyperkalemiapotassiumrenin–angiotensin

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Area of Science:

  • Nephrology
  • Cardiology
  • Endocrinology

Background:

  • Potassium homeostasis is crucial for cellular function.
  • Hyperkalemia poses significant clinical risks, including cardiac arrhythmias and increased mortality.
  • Understanding the mechanisms and consequences of hyperkalemia is vital for patient care.

Purpose of the Study:

  • To review recent advances in understanding potassium homeostasis.
  • To discuss the pathophysiology, risk factors, and consequences of hyperkalemia.
  • To highlight clinical implications and potential management strategies for hyperkalemia.

Main Methods:

  • Review of current literature on potassium homeostasis and hyperkalemia.
  • Analysis of the pathophysiology of hyperkalemia, including factors limiting renal potassium excretion.
  • Identification of major risk factors and clinical consequences associated with hyperkalemia.

Main Results:

  • Hyperkalemia arises from reduced renal potassium excretion due to factors like decreased glomerular filtration rate and impaired distal nephron function.
  • Key risk factors include renal failure, diabetes mellitus, adrenal disease, and use of specific medications (ACE inhibitors, ARBs, potassium-sparing diuretics).
  • Hyperkalemia is linked to increased mortality, cardiac arrhythmias, peripheral neuropathy, and renal tubular acidosis.

Conclusions:

  • Hyperkalemia management is critical, as it contributes to underprescription of essential medications, particularly in heart failure patients.
  • Newer potassium binders offer a potential strategy to mitigate hyperkalemia and facilitate the use of renin-angiotensin inhibitors and mineralocorticoid antagonists.
  • Further research and clinical attention are needed to optimize the management of hyperkalemia and its associated risks.