(a)
| Risk factors | Score |
|---|---|
| Hypotension | 5 |
| IABP | 5 |
| CHF | 5 |
| Age>75 | 4 |
| Anemia | 3 |
| Diabetes | 3 |
| Contrast volume | 1/100 cc |
| Serum Cr> 1.5 | 4 |
| OR | |
| GFR<60 mL/min/1.73 m2 | 2 for 40–60 |
| 4 for 20–40 | |
| 6 for <20 |
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