pathophysiology of hyperkalemia


Low sodium delivery to the distal tubule Common potassium-rich foods include meats, beans, tomatoes, potatoes, and fruits such as bananas. Overview of Physiologic pH and Buffers In CKD, hyperkalemia is typically encountered after the estimated glomerular filtration rate (eGFR) drops below 15 mL/min [The risk factors for hyperkalemia were studied in a meta-analysis of data from >1.2 million individuals with CKD [The medications associated with hyperkalemia are listed in CNI, calcineurin inhibitor; NSAIDs, non-steroidal anti-inflammatory drugs.CNI, calcineurin inhibitor; NSAIDs, non-steroidal anti-inflammatory drugs.For most patients, RAS blockade with a single agent confers a low risk of hyperkalemia. The GFR decreases by approximately 1 mL/min each year in people older than 30 years. A consideration of its nature and current implicationsPotassium homeostasis: the knowns, the unknowns, and the health benefitsEvidence for a gastrointestinal–renal kaliuretic signaling axis in humansHomeostatic potassium excretion in fed and fasted sheepGut sensing of potassium intake and its role in potassium homeostasisMechanisms of renal control of potassium homeostasis in complete aldosterone deficiencyDirect and indirect mineralocorticoid effects determine distal salt transportEffects of pH on potassium: new explanations for old observationsPerioperative Plasma-Lyte use reduces the incidence of renal replacement therapy and hyperkalaemia following renal transplantation when compared with 0.9% saline: a retrospective cohort studyEffects of intraoperative and early postoperative normal saline or Plasma-Lyte 148Glomerulotubular balance, tubuloglomerular feedback, and salt homeostasisA mouse model of pseudohypoaldosteronism type II reveals a novel mechanism of renal tubular acidosisPotassium sensing by renal distal tubules requires Kir4.1Potassium intake modulates the thiazide-sensitive sodium-chloride cotransporter (NCC) activity via the Kir4.1 potassium channelIn primary aldosteronism, mineralocorticoids influence exosomal sodium-chloride cotransporter abundanceAlternatively spliced proline-rich cassettes link WNK1 to aldosterone actionAldosterone acutely stimulates NCC activity via a SPAK-mediated pathwayAldosterone modulates thiazide-sensitive sodium chloride cotransporter abundance via DUSP6-mediated ERK1/2 signaling pathwayThe renal TRPV4 channel is essential for adaptation to increased dietary potassiumWnk4 controls blood pressure and potassium homeostasis via regulation of mass and activity of the distal convoluted tubuleThe calcineurin inhibitor tacrolimus activates the renal sodium chloride cotransporter to cause hypertensionCalcineurin dephosphorylates Kelch-like 3, reversing phosphorylation by angiotensin II and regulating renal electrolyte handlingPotassium handling with dual renin-angiotensin system inhibition in diabetic nephropathySevere hyperkalemia following colon diversion surgery in a patient undergoing chronic hemodialysis: a case reportSpironolactone reduces cardiovascular and cerebrovascular morbidity and mortality in hemodialysis patientsThe safety and efficacy of mineralocorticoid receptor antagonists in patients who require dialysis: a systematic review and meta-analysisA randomized controlled trial of the effect of spironolactone on left ventricular mass in hemodialysis patientsHyperkalemia across the continuum of kidney functionSerum potassium and adverse outcomes across the range of kidney function: a CKD Prognosis Consortium meta-analysisBrief report: trimethoprim-induced hyperkalemia in a patient with AIDSThe mechanism of hyperkalaemia when co-trimoxazole is given with spironolactoneHyperkalemic hyperchloremic metabolic acidosis: pathophysiologic insightsHyperkalemia after initiating renin-angiotensin system blockade: the Stockholm Creatinine Measurements (SCREAM) projectCardiorenal end points in a trial of aliskiren for type 2 diabetesCombined angiotensin inhibition for the treatment of diabetic nephropathyTelmisartan, ramipril, or both in patients at high risk for vascular eventsTrue rate of mineralocorticoid receptor antagonists-related hyperkalemia in placebo-controlled trials: a meta-analysisRates of hyperkalemia after publication of the randomized aldactone evaluation studyNonsteroidal antagonists of the mineralocorticoid receptorPF-03882845, a non-steroidal mineralocorticoid receptor antagonist, prevents renal injury with reduced risk of hyperkalemia in an animal model of nephropathyTrimethoprim use for urinary tract infection and risk of adverse outcomes in older patients: cohort studyHyporeninemic hypoaldosteronism and diabetes mellitus: pathophysiology assumptions, clinical aspects and implications for managementIntraoperative and postoperative hyperkalaemia after total parathyroidectomy following exposure to cinacalcet in sixteen patients for renal hyperparathyroidismSerum potassium and the long interdialytic interval: minding the gapDialysate potassium, serum potassium, mortality, and arrhythmia events in hemodialysis: results from the Dialysis Outcomes and Practice Patterns Study (DOPPS)Association of abnormal serum potassium levels with arrhythmias and cardiovascular, ortality: a systematic review and meta-analysis of observational studiesThe relation of serum potassium concentration with cardiovascular events and mortality in community-living individualsElevated baseline potassium level within reference range is associated with worse clinical outcomes in hospitalised patientsSerum potassium and cardiovascular outcomes: the highs and the lowsRelation of electrolyte disturbances to cardiac arrhythmiasThe clinical significance of hyperkalaemia-associated repolarization abnormalities in end-stage renal diseaseSodium is the secret re-agent of bicarbonate therapy during hyperkalemiaEvidence for a causal relationship between hyperkalaemia and axonal dysfunction in end-stage kidney diseaseRandomized, controlled trial of the effect of dietary potassium restriction on nerve function in CKDEffect of bath and luminal potassium concentration on ammonia production and secretion by mouse proximal tubules perfused in vitroEffects of chronic hyperkalemia on renal production and proximal tubule transport of ammonium in ratsMechanism of hyperkalemia-induced metabolic acidosisSerum potassium and short-term clinical outcomes among hemodialysis patients: impact of the long interdialytic intervalFactors associated with underuse of mineralocorticoid receptor antagonists in heart failure with reduced ejection fraction: an analysis of 11 215 patients from the Swedish Heart Failure Registry: MRA underuse in HFrEFThe treatment gap in patients with chronic systolic heart failure: a systematic review of evidence-based prescribing in practiceSerum potassium as a predictor of adverse clinical outcomes in patients with chronic kidney disease: new risk equations using the UK clinical practice research datalinkPatiromer in patients with kidney disease and hyperkalemia receiving RAAS inhibitors© The Author(s) 2019. In one series, 406 (1.4%) of 29,063 patients who were hospitalized developed hyperkalemia; 58 (14.3%) of the 406 died, with the risk increasing as the potassium level increased.Whereas 28% of patients with a serum potassium level above 7 mEq/L died, only 9% of those with a potassium level below 6.5 mEq/L died.Interestingly, in a large study of individuals living in the community, serum potassium leveles greater than 5.0 mEq/L correlated with increased mortality, although the mechanisms were not clear.Murata K, Baumann NA, Saenger AK, Larson TS, Rule AD, Lieske JC. Insulin enhances potassium entry into cells, whereas glucagon impairs it.

Hyperkalemia occurs when renal potassium excretion is limited by reductions in glomerular filtration rate, tubular flow, distal sodium delivery or the expression of aldosterone-sensitive ion transporters in the distal nephron.

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