Risk category | Aortic Augmentation Index (Aix) |
| |
I | Optimal | Aix < 30% | No signs of endothelial dysfunction |
II | Normal | −30% < Aix < −10% | No signs of endothelial dysfunction |
III | Increased | −10% < Aix < 10% | Signs of endothelial dysfunction |
IV | Abnormal | Aix > 10% | Clearly endothelial dysfunction |