Mechanisms of Stroke Flashcards
Used to treat a patient with an ischemic stroke
IV TPA
What are the contraindications for TPA?
Active bleeding, bleeding diathesis, or recent intracranial or spinal surgery, or serious head trauma
How many million neurons are lost in one hour of a stroke?
120 Million
The benefits of a thrombectomy decrease with
Time
Brain pain is a
Transient Ischemic Attack
Makes up 78% of strokes
Ischemic Stroke
Makes up 22% of strokes
Hemorrhagic Stroke
What are three complications with SAH?
- ) Rebleeding (24-48 hrs)
- ) Hydrocephalus (More than 24 hours)
- ) Vasospasm (7-10 days)
Fails at the extremes of blood pressure, cerebral blood flow
Autoregulation
Large vessels are named, and small vessels are unnamed
Perforators
The highest risk of stroke recurrence is
Cardioembolic sources
Subdivided into deep and lobar mechanisms
Hemorrhagic Stroke
Typically have a higher risk of bleed recurrence
Lobar Hemorrhages
Spontaneous subarachnoid hemorrhage is caused by
-Occurs at branchpoints in circle of willis
Saccular Aneurysms
An infarction in the ACA territory causes
Abulia, Amnesia, and contralateral leg weakness
Causes contralateral hemiparesis, facial paresis, and aphasia
MCA Territory Infarction
Causes contralateral hemiparesis, hemianopia, behavioral abnormalities, and confusion
PCA Territory Infarction
If the midbrain is involved in a PCA infarct, we will see
Ipsilateral CN3 palsy
Causes contralateral hemisensory intranuclear opthalmoplegia and Ipsilateral horizontal gaze paralysis
Basilar Territory Infarction
Causes ipsilateral appendicular ataxia
SCA territory Infarction
Causes ipsilaterl ataxia and hearing loss and also vertigo
AICA Territory Infarction
