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Potassium is the most important intracellular cation and the kidneys play a pivotal role in potassium homeostasis. Potassium disorder is a common electrolyte abnormality and it increases the risk of death from any cause, particularly cardiovascular events. Hyperkalemia is a common electrolyte abnormality encountered post organ transplantation. The etiology is multifactorial, and includes drugs such as calcineurin inhibitors. In certain regards, the clinical picture of post-transplantation hyperkalemia and hypertension resembles that of Gordon syndrome or familial hyperkalemic hypertension, a disorder characterized by over activity of thiazide-sensitive sodium chloride cotransporter. Effective and safe management of chronic hyperkalemia can be challenging in this special patient population. Despite the significant short-term and long-term side effects, fludrocortisone (a potent synthetic oral mineralocorticoid receptor agonist) has emerged as the default drug of choice for treatment of refractory hyperkalemia in many organ transplant recipients. However, the long-term efficacy and safety of fludrocortisone for management of hyperkalemia in organ transplant recipients remains unknown. This review discusses potassium homeostasis, including the role of the kidneys, and focuses on calcineurin inhibitor-induced hyperkalemia and on the under-appreciated role of thiazide-type diuretic use in management of hyperkalemia and hypertension. We present an illustrative case of post-transplantation hyperkalemia and hypertension with relevant literature.
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?:doi
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10.1016/j.amjms.2020.06.021
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The_American_journal_of_the_medical_sciences
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Hyperkalemia and Hypertension Post Organ Transplantation - A Management Challenge.
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