Table 1.

Classification of brain hemorrhages postthrombolysis for acute ischemic stroke, according to the European Cooperative Acute Stroke Study II trial[3]

ECASS classification of hemorrhagic transformation

HI

H-1: Small petechiae along margins of infarcted area

H-2: Confluent petechiae within the infarcted area; no mass effect

PH

PH-1: Hematoma less than 30% of infarcted area, with mild mass effect

PH-2: Hematoma in more than 30% of infarcted area, with notable mass effect

HI=Hemorrhagic infarction, PH=Parenchymal hemorrhage