Aims: The aim of this study was to evaluate the impact on prognosis of renal impairment (RI) in Middle Eastern patients after percutaneous coronary intervention (PCI).
Methods and results: PCI patients (N=2,426) were divided into three groups according to the estimated glomerular filtration rate (eGFR, ml/min/1.73 m2): normal renal function (eGFR ≥90), mild RI (eGFR 60-89), or moderate to severe RI (eGFR <60). Mean age of participants was 56±11 years. Normal renal function was present in 41.6%, mild RI in 44.2%, and moderate to severe RI in 14.2%. Patients with moderate to severe RI were older and had higher prevalence of hypertension and diabetes mellitus compared with other patients (p≤0.002). At one year, patients with moderate to severe RI had a higher incidence of cardiac mortality (3.78%) compared with patients with mild (1.77%) or no RI (1.49%), p=0.03. In multivariate analysis, moderate to severe RI was associated with higher one-year cardiac mortality compared to mild or no RI (odds ratio=3.7; 95% CI: 2.8-5.0, p=0.001).
Conclusions: Impaired renal function was present in about six out of 10 Middle Eastern patients undergoing PCI. Moderate to severe RI carries a higher risk of cardiac mortality at one year compared with mild or no RI.