Impact of Renin-Angiotensin Aldosterone System Inhibition on Serum Potassium Levels among Peritoneal Dialysis Patients

• Autor(a) principal: Ribeiro, Silvia Carreira
• Data de Publicação: 2017
• Outros Autores: Figueiredo, Ana Elizabeth, Barretti, Pasqual [UNESP], Pecoits-Filho, Roberto, De Moraes, Thyago Proença
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1159/000479011; http://hdl.handle.net/11449/179059
• topic: Angiotensin converting enzyme inhibitors; Angiotensin receptor blockers; Hyperkalemia; Hypokalemia; Peritoneal dialysis; Potassium; Renin-angiotensin aldosterone system

Background: The chronic use of angiotensin-converting enzyme inhibitors or angiotensin II receptor blocker has been associated with hyperkalemia in patients with reduced renal function even after the initiation of hemodialysis. Whether such medications may cause a similar effect in peritoneal dialysis patients is not well established. So, the aim of our study was to analyze the impact of renin-angiotensin-aldosterone inhibitors on the serum levels of potassium in a national cohort of peritoneal dialysis patients. Method: A prospective, observational, nationwide cohort study was conducted. We identified all incident patients on peritoneal dialysis that had angiotensin converting enzyme inhibitors (ACEi) or angiotensin receptor blockers (ARB) prescribed for at least 3 months and a similar period of time without these medications. Patients were divided into 4 groups: Groups I and III correspond to patients using, respectively, an ACEi or ARB and then got the drug suspended; Groups II and IV started peritoneal dialysis without the use of any renin-angiotensin aldosterone system inhibitor and then got, respectively, an ACEi or ARB introduced. Changes in potassium serum levels were compared using 2 statistical approaches: (1) the non-parametric Wilcoxon test for repeated measures and (2) a crossover analysis. Results: Mean potassium serum levels at the first phase of the study for Groups I, II, III, and IV were, respectively, 4.46 ± 0.79, 4.33 ± 0.78, 4.41 ± 0.63, and 4.44 ± 0.56. Changes in mean potassium serum levels for Groups I, II, III, and IV were -0.10 ± 0.60, 0.02 ± 0.56, -0.06 ± 0.46, and 0.03 ± 0.50, respectively. Conclusion: The use of ACEi and ARB was not associated with a greater risk for hyperkalemia in stable peritoneal dialysis patients independently of residual renal function.