TABLE II.
Contrast Dose Relationship to Differences in Patient and Procedural Characteristics
| Number (percent) |
|||
|---|---|---|---|
| Patient and procedural characteristics | Low dose contrast < 6 cm3/kg (n = 1,741) | High dose contrast ≥ 6 cm3/kg (n = 580) | P-value |
| Age | <0.001 | ||
| Less than 1 year | 417 (24) | 296 (51) | |
| 1–10 years | 851 (49) | 270 (47) | |
| 11–18 years | 473 (27) | 14 (2) | |
| Weight | <0.001 | ||
| Less than 4 kg | 151 (9) | 105 (18) | |
| 4–9 kg | 359 (21) | 275 (47) | |
| Greater than or equal to 10 kg | 1,231 (71) | 200 (34) | |
| Underlying diagnosis | <0.001 | ||
| No structural heart disease | 251 (14) | 3(1) | |
| Isolated defects | 415 (24) | 45 (8) | |
| Pulmonary hypertension | 45 (3) | 2 (0) | |
| Complex two ventricle physiology | 611 (35) | 325 (56) | |
| Single ventricle physiology | 415 (24) | 204 (35) | |
| Type of Procedure | <0.001 | ||
| Hemodynamic catheterization | 455 (26) | 89 (15) | |
| Interventional catheterization | 1,127 (65) | 491 (85) | |
| Biopsy and coronary angiography | 159 (9) | 0 (0) | |
| Highest procedure risk group | <0.001 | ||
| 1 | 1,284 (74) | 250 (43) | |
| 2 | 269 (16) | 153 (27) | |
| 3 | 179 (10) | 176 (30) | |
| Duration of Case (hours) | <0.001 | ||
| Less than 1 | 365 (22) | 19 (3) | |
| 1–1.9 | 822 (50) | 164 (30) | |
| 2–2.9 | 334 (20) | 202 (36) | |
| Greater than or equal to 3 | 140 (8) | 171 (31) | |