Tag Archives: stroke

Subarachnoid and Intraventricular Hemorrhage

Subarachnoid and intraventricular hemorrhage can be spontaneous, as in the case of a bleeding aneurysm or arteriovenous malformation, or secondary to trauma. CT is the imaging modality of choice for evaluating these types of hemorrhages because it detects the hemorrhage from its onset as a hyperdensity. However, subarachnoid hemorrhage is not as radiodense as epidural […]

Hemorrhagic Stroke Imaging

A stroke is considered truly hemorrhagic if blood is found within the first 24 hours after initial symptoms. When blood is noted after this time, it is usually hemorrhagic transformation of an ischemic stroke, which is due to reperfusion injury. Hypertension is the most common cause of intraparenchymal hemorrhage, which can also be caused by […]

Ischemic Stroke Imaging

Cerebral ischemia can be produced by thrombosis of large extracranial or small intracerebral vessels, emboli originating from atherosclerotic plaques or thrombi within more proximal vessels or the heart. In addition, decreased perfusion of systemic origin, such as shock, decreased cardiac output, or respiratory failure can also cause cerebral ischemia with or without infarction, Cerebral ischemia […]