Table 2.

Incidence and subtypes of hemorrhagic transformation.

HT category	Subtype	Definition (ECASS)	n (%)
Overall HT incidence	–	–	28/181 (15.5)
HI	HI-1	Small petechiae along the infarct margins	10 (35.7)
	HI-2	Confluent petechiae without mass effect	7 (25.0)
PH	PH-1	Hemorrhage involving <30% of infarct area with slight mass effect	6 (21.4)
	PH-2	Hemorrhage involving ≥30% of infarct area with mass effect	5 (17.9)

ECASS = European Cooperative Acute Stroke Study, HI = hemorrhagic infarction, HT = hemorrhagic transformation, PH = parenchymal hematoma.