PHRM 211 Lecture Notes - Lecture 29: Fibrin, Headache, Platelet
Document Summary
Ischemic stroke and acute intracerebral hemorrhage (part 2) A brief episode of neurological dysfunction caused by focal brain, spinal cord or retinal ischemia, with clinical symptoms and without imaging evidence of acute infarction . Brief: symptoms resolve within 24 h (usually within 1 h) No evidence of acute infarction on imaging imaging needed to differentiate tia from a stroke. Sometimes called a mini-stroke but should be treated as a serious warning. 4-20% of patients with a tia develop a stroke within 90 days, half within first 48 hrs. Predicts short-term risk of stroke after a tia. Head ct non-contrast : images brain structures and tissues. Early signs of ischemia may be seen, but are subtle and may not be present. More importantly, rules out bleeding, edema, mass effect, and other stroke mimics such as tumour. First imaging test for patients with suspected stroke. Head ct angiogram (ct-a): images blood vessels after injecting contrast.
