Mean hemodynamic parameters versus AVM angioarchitectural features and clinical presentation
| Angioarchitectural feature | Present, n Absent, n | A-Vt mean (s) | p Value | A-Vt index mean (mm/s) | p Value | iFlow mean (s) | p Value | AVM flow mean (mL/min) | p Value |
|---|---|---|---|---|---|---|---|---|---|
| Venous stenosis | 6 27 | 1.5 1.7 | 0.64 | 9.0 7.4 | 0.71 | 6.0 5.1 | 0.23 | 306 230 | 0.33 |
| Venous ectasia | 12 21 | 1.5 1.8 | 0.10 | 8.6 7.2 | 0.23 | 5.4 5.2 | 0.38 | 306 208 | 0.09 |
| Venous varix | 8 25 | 1.4 1.8 | 0.45 | 8.5 7.4 | 0.43 | 5.6 5.1 | 0.17 | 266 237 | 0.43 |
| Single draining vein | 12 21 | 1.7 1.7 | 0.97 | 2.8 10.5 | <0.01* | 5.3 5.2 | 0.62 | 190 275 | 0.12 |
| Deep venous drainage | 16 17 | 1.7 1.7 | 0.87 | 9.7 5.8 | 0.12 | 5.2 5.3 | 0.82 | 257 232 | 0.72 |
| Arterial ectasia | 3 30 | 1.1 1.8 | 0.14 | 10.7 7.4 | 0.62 | 4.3 5.4 | 0.27 | 397 229 | 0.07 |
| Intranidal aneurysm | 2 31 | 1.1 1.7 | 0.47 | 12.4 7.4 | 0.76 | 4.8 5.3 | 0.76 | 266 242 | 0.94 |
| Intranidal fistula | 6 27 | 1.3 1.8 | 0.33 | 12.5 6.6 | 0.05* | 4.5 5.4 | 0.44 | 300 231 | 0.40 |
| Arterial steal | 4 29 | 2.2 1.6 | 0.89 | 10.3 7.3 | 0.17 | 4.7 5.3 | 0.89 | 336 231 | 0.30 |
| Hemorrhagic presentation | 9 24 | 1.5 1.7 | 0.95 | 6.6 8.1 | 0.66 | 5.8 5.0 | 0.07 | 145 281 | 0.04* |
| Seizure | 10 23 | 1.4 1.8 | 0.68 | 7.3 7.8 | 0.70 | 4.3 5.7 | 0.02* | 351 197 | 0.02* |
*Indicates p≤0.05.
AVM, arteriovenous malformation; A-Vt, arterial-to-venous time.