Doses intermitentes de estatina em pacientes em hemodiálise com LDL-colesterol espontaneamente baixo

Abstract

Background:Mortality in dialysis patients remains high and is due mainly to cardiovascular causes. Inflammation has a role in the genesis ofaccelerated atherosclerosis, vascular calcification, malnutrition and anemia, and a huge impact on the survival of these patients. The pleiotropic effects of statins can be a therapeutic option for reducing chronic inflammatory processes of patients undergoing hemodialysis.Objective:To evaluate the effects of low doses of simvastatin on inflammatory markers, hematimetric and nutritional parameters of patientsundergoing hemodialysis.Methods:Clinically-stable patients undergoing hemodialysis were classified according to their baseline LDL-cholesterol levels in two groups:those with levels below 100mg/dl (Group 1) and those with levels equal to or greater than 100mg/dl (Group-2), and were treated withsimvastatin during eight weeks. Group 1 received 20mg only after each session of hemodialysis (intermittent dose), whereas Group 2 received 20mg/daily. Laboratory data, erythropoietin resistance index and nutritional parameters were obtained before and after treatment.Results:A significant and equivalent reduction in C-reactive protein levels in both groups was observed (35.97±49.23% vs 38.32±32.69%, p=0.86). In group 1, there was also a tendency towards reduced resistance to erythropoietin (228.6±16.2 vs 208.9±16.2, p=0.058) and improvement of hematimetric parameters (hematocrit: 33.1±5.9% vs 36.1±4.5%, p=0.021).Conclusion:Intermittent doses proved to be as effective as the usual dose in reducing C-reactive protein levels and resistance to erythropoietin, besides improving the hematimetric parameters, indicating an important reduction of the cardiovascular risk evaluated by these parameters. (Arq Bras Cardiol 2008;90(2):104-111)