JOURNAL ARTICLE

Contrast induced nephropathy in patients with pre-existing renal impairment undergoing coronary angiogram and percutaneous transluminal coronary angioplasty

B Subedi, M A Siddique, S M Zaman, M I Hasan, J Arzu, A Awal, K Fatema
Mymensingh Medical Journal: MMJ 2011, 20 (2): 270-4
21522099
Contrast induced nephropathy is the third leading cause of acute renal failure in hospitalized patients. However, its incidence and risk factors in Bangladeshi population undergoing coronary angiogram and percutaneous coronary intervention is not clear. This study was to assess the incidence of contrast induced nephropathy in patients, with or without pre existing renal impairment, undergoing coronary angiogram and percutaneous transluminal coronary angioplasty in Bangladeshi population. Two hundred patients undergoing coronary angiogram and percutaneous were included in the study .Patients having history of contrast allergy and patients on renal dialysis were excluded from the study. Serum creatinine level was estimated before the undergoing procedure. Creatinine clearance rate was calculated by applying Cockcroft Gault formula to the preprocedure serum creatinine level. Patients were assigned to one of the two groups, that is with or without chronic renal insufficiency. Serum creatinine levels were again estimated at the end of 24 hours of contrast exposure. The rise of serum creatinine by ≥0.5mg/dl or ≥25% occurring within 24 hours of contrast administration was defined as contrast induced nephropathy. The incidences of Contrast induced nephropathy (CIN) in these groups were compared. We tried to analyze whether there is relation between the incidence of CIN with contrast volume, chronic renal insufficiency, diabetes mellitus, and coronary procedures undergone. We enrolled 120 pre existing chronic renal insufficiency patients and 80 patients without pre existing chronic renal insufficiency. In this study 21.7% of pre existing chronic renal insufficiency group and 6.3% of no pre existing chronic renal insufficiency group developed contrast induced nephropathy (p=0.003). Contrast induced nephropathy is an iatrogenic disorder and pre existing renal impairment is one of the risk factors for developing contrast induced nephropathy.

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