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Rev. Soc. Bras. Clín. Méd ; 9(5)set.-out. 2011.
Article in Portuguese | LILACS | ID: lil-601353

ABSTRACT

JUSTIFICATIVA E OBJETIVOS: Na prática clínica a avaliação da função renal costuma ser realizada através da dosagem da creatinina. No entanto, este constitui um parâmetro relativamente tardio para detecção da lesão renal. O objetivo deste estudo foi avaliar a sensibilidade da creatinina sérica como marcador da função renal em pacientes coronariopatas, e identificar os fatores associados à hipercreatinemia e à redução da taxa de filtração glomerular (TFG).MÉTODO: Estudo transversal com 969 pacientes de ambos os sexos e idade ≥ 20 anos com diagnóstico de coronariopatia (firmado pelo cateterismo cardíaco ou cintilografia do miocárdio), internados em enfermaria de hospital universitário cardiológico. Avaliaram-se dados demográficos, clínicos, bioquímicos e antropométricos. A TFG foi estimada pela equação proposta por Cockcroft Gault, sendo considerada disfunção renal quando TFG < 60 mL/min/1,73m2. RESULTADOS: A mediana de idade foi 61 anos, com predomínio do sexo masculino (60,9%) e de pacientes com excesso de peso (47,7%). A prevalência de hipercreatinemia foi 19,6%e de TFG < 60 mL/min/1,73m2 foi 30,9%. A sensibilidade da creatinina na detecção do comprometimento renal foi 54,2%, sendo menor nas mulheres e nos idosos, e a especificidade foi 95,8%. Um paciente com creatinina normal apresentou probabilidade de 17,6% de ter TFG diminuída. Maior acurácia da creatinina na avaliação da função renal foi observada nos adultos e no sexo masculino. Foi identificada associação da TFG diminuída com a idade > 60 anos (p < 0,001), diabetes (p =0,003), hipertensão arterial (p = 0,004) e com o baixo peso (p < 0,001).(...)


BACKGROUND AND OBJECTIVES: In clinical practice, assessment of renal function is usually performed by creatinine dosage. However, this is a relatively late parameter for detection of renal injury. The aim of this study was to assess the sensitivity of serum creatinine as a maker of renal function in patients with coronary artery disease and identify the factors associated with hipercreatinemy and reduced glomerular filtration rate (GFR). METHOD: Cross-sectional study with 969 patients of both sexes and aged ≥ 20 years with a diagnosis of coronary arterydisease (signed by cardiac catheterization or myocardial scintigraphy), admitted to a cardiology university hospital's ward. Demographic, clinical, biochemical and anthropometric data were evaluated. The glomerular filtration rate (GFR) was estimated by the equation proposed by Cockcroft Gault with renal dysfunction considered when GFR < 60 mL/min/1.73m2. RESULTS: The median age was 61 years with male predominance (60.9%) and overweight (47.7%). The hipercreatinemy was found in 19.6% of patients and GFR < 60 mL/min/1,73m²in 30.9%. The creatinine sensitivity was 54.2% in the rena limpairment detection and 95.8% specificity. Less sensitivity was observed in women and elderly. One patient with normal creatinine showed 17.6% probability to have impaired GFR.Greater creatinine accuracy was observed in adults and males. GFR association was decreased with age > 60 years (p < 0.001), diabetes (p = 0.003), hypertension (p = 0.004) and low weight(p < 0.001). CONCLUSION: Serum creatinine dosage as marker of renal function in patients with coronary artery disease, especially inthe elderly and women, had low sensitivity compared to the GFR estimated by the Cockcroft Gault equation. Diabetic, hypertensive, elderly and low weight patients who had higher prevalence of renal dysfunction should have their FG rate monitored routinely.


Subject(s)
Humans , Male , Female , Coronary Disease , Creatinine , Glomerular Filtration Rate , Renal Insufficiency, Chronic
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