TABLE 1.
Overview of bleeding events, categorized with HBC and the ECASS classification, according to anatomical, descriptive, and clinical features
| HBC | ECASS | Patients with HT (data set 1; n = 88) | Patients with HT (data set 2; n = 15) | Description |
|---|---|---|---|---|
| 1a | HI1 | 4 (4.55%) | 0 | Scattered small petechia, no mass effect |
| 1b | HI2 | 7 (7.95%) | 1 (6.67%) | Confluent petechia, no mass effect |
| 1c | PH1 | 13 (14.77%) | 2 (13.33%) | Hematoma within infarcted tissue, occupying <30%, no substansive mass effect |
| 2 | PH2 | 34 (38.64%) | 6 (40.00%) | Hematoma occupying >30% or more of the infarcted tissue, with obvious mass effect |
| 3a | – | 2 (2.27%) | 0 | Parenchymal hematoma remote from infarcted brain tissue |
| 3b | – | 0 | 0 | Intraventricular hemorrhage |
| 3c | – | 27 (30.68%) | 6 (40.00%) | Subarachnoid hemorrhage |
| 3d | – | 1 (1.14%) | 0 | Subdural hemorrhage |
Abbreviations: ECASS, European Collaborative Acute Stroke Study; HBC, Heidelberg Bleeding classification; HI, hemorrhagic infarction; HT, hemorrhagic transformation; PH, parenchymatous hematoma.