Arquivos Brasileiros de Cardiologia (May 2011)
Impacto da insuficiência renal crônica na eficácia de stents farmacológicos: estudo de seguimento de longo prazo Impacto de la insuficiencia renal crónica en la eficacia de Stents farmacológicos: estudio de seguimiento de largo plazo Impact of chronic kidney disease on the efficacy of drug-eluting stents: long-term follow-up study
Abstract
FUNDAMENTO: Pacientes com Insuficiência Renal Crônica (IRC) submetidos à angioplastia coronária apresentam maiores taxas de revascularização da lesão alvo (RLA) e mortalidade. Os stents farmacológicos (SF) estão associados com taxas menores de reestenose, quando comparados aos stents não farmacológicos (SNF), embora em pacientes com IRC os dados da eficácia e segurança do SF sejam limitados. OBJETIVO: Buscamos avaliar a segurança e eficácia dos SF em pacientes com IRC significante, quando comparados a pacientes com função renal normal em um registro da "vida real". MÉTODOS: 504 pacientes submetidos à intervenção coronariana percutânea com SF em dois centros foram incluídos. Os desfechos foram estratificados baseados na presença de IRC, definida como taxa de filtração glomerular basal FUNDAMENTO: Pacientes con Insuficiencia Renal Crónica (IRC) sometidos a angioplastia coronaria presentan mayores tasas de revascularización de la lesión blanco (RLB) y mortalidad. Los stents farmacológicos (SF) están asociados con tasas menores de reestenosis, cuando son comparados a los stents no farmacológicos (SNF), aunque en pacientes con IRC los datos de la eficacia y seguridad del SF sean limitados. OBJETIVO: Buscamos evaluar la seguridad y eficacia de los SF en pacientes con IRC significativa, cuando fueron comparados a pacientes con función renal normal en un registro de la "vida real". MÉTODOS: 504 pacientes sometidos a intervención coronaria percutánea con SF en dos centros fueron incluidos. Los desenlaces fueron estratificados basados en la presencia de IRC, definida como tasa de filtración glomerular basal BACKGROUND: Patients with chronic kidney disease (CKD) submitted to coronary angioplasty have higher rates of target lesion revascularization (TLR) and mortality. Drug-eluting stents (DES) are associated with a lower rate of restenosis, compared to bare metal stents (BMS), although data on DES efficacy and safety is limited in patients with CKD. OBJECTIVE: We sought to evaluate the safety and efficacy of DES in patients with significant CKD as compared to patients without normal renal function in a real world registry. METHODS: 504 patients who underwent percutaneous coronary intervention with DES in two centers were included. Outcomes were stratified based on the presence of CKD, defined as a baseline glomerular filtration rate (GFR) < 60 ml/min/1.73 m². RESULTS: The mean follow-up was 22.7 months. CKD was present in 165 patients (32.7%). Patients with CKD were older, had a higher incidence of hypertension and diabetes. CKD patients presented an increased incidence of death (12.3% vs 2.4%, p < 0.001) and myocardial infarction (MI) (7.4% vs 3.3%, p = 0.04) compared to patients without CKD. TLR rates were similar between groups (4.8% vs 5.6%, p = 0.7, CKD and no CKD patients, respectively). Independent predictors of death were CKD (HR 6.93; 2.4 - 19.5, p < 0.001), current smoking (HR 3.66; 1.20 - 11.10, p = 0.02) and diabetes (HR 2.66; 1.03 - 6.60, p = 0.045). CONCLUSION: In this registry, coronary intervention with DES in patients with CKD was associated with similar TLR compared to patients without CKD, demonstrating the efficacy of DES in preventing in-stent restenosis in this patient population. CKD was related to significantly increased MI and mortality rates.
