ABSTRACT
The main distinction is between intracranial hemorrhage (ICH) including venous stroke on one side, and arterial stroke on the other [1,2]. Both may lead to parenchymal damage, but the mechanism is different. In ICH, there is an initial hemorrhagic event, usually originating from the germinal matrix, which may then rupture in the ventricular system. In some cases, this hemorrhagic sequence complicates further with engorgement and bleeding at the level of the medullary venous plexus (venous stroke), which results in parenchymal damage; venous stroke may also occur as an isolated lesion, without intraventricular bleeding. Conversely, the arterial stroke is a phenomenon which leads to major cortical damage through an arterial (and not venous) ischemic/hypoxic event.
