Contrast medium volume to estimated glomerular filtration rate ratio as a predictor of contrast-induced nephropathy developing after elective percutaneous coronary intervention.
BACKGROUND
Contrast-induced nephropathy (CIN) has been recognized as a serious complication of diagnostic coronary angiography and percutaneous coronary intervention (PCI), and has been associated with prolonged hospitalization and adverse clinical outcomes. A key step to minimize the risk for developing CIN is to identify patients at risk for CIN.


RESULTS
We retrospectively investigated clinical factors associated with the development of CIN in 60 stable angina patients who had undergone elective PCI. The frequency of CIN was 13% (8/60). There were neither any significant differences in age, gender, baseline serum creatinine or hemoglobin levels, nor in the rate of diabetes mellitus between the CIN and the non-CIN group. However, the estimated glomerular filtration rate (eGFR) was significantly lower (40.4+/-11.4 mL/min/1.73 m(2) vs. 57.4+/-22.6 mL/min/1.73 m(2), p=0.044), and number of treated vessels (1.5+/-0.8 vs. 1.2+/-0.4, p=0.039) and stents used (2.1+/-0.6 vs. 1.4+/-0.6, p=0.007) were significantly higher in the CIN group. In addition, the amount of contrast medium was significantly larger (272+/-37 mL vs. 201+/-62 mL, p=0.003) and the contrast medium volume (CMV) to eGFR ratio (CMV/eGFR) was significantly greater (7.4+/-2.9 vs. 4.0+/-2.0, p=0.0001) in the CIN group. Stepwise regression analysis showed that the CMV/eGFR ratio was a significant independent predictor of CIN (p=0.035). At a cut-off point of >5.1, the CMV/eGFR ratio exhibited 87.5% sensitivity and 74.5% specificity for detecting CIN.


CONCLUSIONS
The CMV/eGFR ratio could be a useful predictor of CIN developing after elective PCI.
Division of Cardiology, Department of Internal Medicine, Yokohama Sakae Kyosai Hospital, Federation of National Public Service Personnel Mutual Associations, 132 Katsura-cho, Sakae-ku, Yokohama 247-8581, Japan. nozue2493@yahoo.co.jp
Tsuyoshi
T
Nozue
Ichiro
I
Michishita
Taku
T
Iwaki
Ichiro
I
Mizuguchi
Motohiro
M
Miura
D000328:Adult; D000368:Aged; D000787:Angina Pectoris / Q000000981:diagnostic imaging / Q000628:therapy*; D017130:Angioplasty; D003287:Contrast Media / Q000008:administration & dosage* / Q000009:adverse effects*; D017023:Coronary Angiography; D005260:Female; D005919:Glomerular Filtration Rate; D006801:Humans; D007674:Kidney Diseases / Q000139:chemically induced* / Q000175:diagnosis*; D008297:Male; D011237:Predictive Value of Tests; D012044:Regression Analysis; D012189:Retrospective Studies
D003287:Contrast Media