Stroke, hemorrhage, cerebrovascular diseases Flashcards
Types of strokes
- Hemorragic (subarachnoid hemorrhage, intracerebral hemorrage)
- Ischaemic (atherosclerosis, small vessel disease, cardioembolism, rare causes, criptogenic)
Consecuentes of parenchymal hemorrage
Increases in IP: secondary brainstem hemorrhage of Duret, pathomorphological confirmation of brain death
HErniations: subfalcine, transtentorial, tonsilar
Subarachoid hemorrage clinical feature
Sudden severe headache
Vomiting
Neck stiffness (rigidez en el cuello)
Consciousness disturbances
Xantochromatic CSF
Increased intracranial pressure causes
Bleeding
Impaired circulation
Brain edema
Increased intracranial pressure consequences
Decresed cerebral perfusion pressure
Preretinal bleeding
Brain herniation
Hydrocephalus
Clinical presentation of subarachnoid hemorrage
Sudden, worst headache which doesn’t go away
Vomiting
Disturbance of consciousness
Meningeal signs
Rarely focal neurological dysfunction
Recognizing acute ischemic stroke
Sudden onset of symptoms and signs
Typical clinical signs: MCA, ACA, PCA, POCA, AICA syndromes
Improvement of clinical symptoms and sigs in less than a day
Patients can have:
-homonymous visual defect in field opposite involved artery
- Language defect when dominant hemisphere involved
- hemiparesis or the side opposite involved artery
- patient may awaken from sleep unable to move affected side
Endovascular treatment for AIS
Blood vessel
Blood clot
Stent
Patients with stroke and AF are prescribed
New coagulant drugs
Varfarine treatment
Intracerebral haemorrhage
Sudden devastating presentation
Rupture of a vessel: development of hematoma–> focal clinical deficit, deterioration of conscious level secondary of mass effect.
Patient in coma with vomiting and/or neck stiffness are more likely to have
Intracerebral hemorrhage than ischemic stroke
Causes of intracerebral hemorrhage
Hypertensive small vessel disease
Anticoagulants
Amyloid angiopathy
Arteriovenous malformation
Aneurysm
Thalamic haemorrage produces
sensory change in the contralateral limbs
Putaminal haemorrage produces
contralateral hemiparesis and conjugate deviation of the eye towards the side of the hematoma
Lobar haemorrage produces in frontal lobe
eye deviation
Contralateral hemiparesis
Lobar haemorrage produces in the central region
hemisensory loss
dysphasia in the dominant hemisphere
Lobar haemorrage produces in the parietal ole
Hemisensory loss
neglect or innatention
Lobar haemorrage produces in temporal lobe
Fluent dysphasia with poor comprehension, secondary ro damage of Wernicke
Pontine haemorrage produces
Coma with pinpoint pupils
Loss of horizontal eye movement
Quadriparesis
Intraventricular haemorrhage produces
Headache
Vomiting
Neck stiffness
Depression of consciousness
Treatment of intracranial aneurism
Embolisations with coils
Flow diverter stents
Arteriovenous malformations and fistulas treatment
Embolisation with liquid agent (Onyx)
Drug used for prevention of stroke
Arterial thrombosis: antiplatelet drugs (aspirin)
Venous thrombosis: anticoagulant drugs (warfarin)
Drugs that affect coagulation cascade
Heparin (binds to antithrombin III and accelerates its binding to thrombin and factor Xa and prevent fibrin formation)
Warfarin (Antagonizes cofactor function of fit K and so affect factors II, VII, IX, X)
Causes of TIA (transient ischemic attack)
Trombotic or embolic
Small vessel disease
Cardioembolism
arterial disección or hypercoagulability
Cryptpgenic TIA/stroke
TIA
Transient neurological condition due to focal cerebral, spinal cord or retinal ischemia without acute infarction. Lasting up to 24h
Symptoms of TIA
Focal neurological deficit or monocular visual disturbance
Sudden onset. Maximal at onset
Focal insufficiency of cerebral blood flow
Lasting up to 24h
Patient with sudden pain on the left side of the neck, miosis of left pupil and ptosis of the left eyelid and hemiplegia on the right side. Cause
Dissection of the internal carotid artery
Most common location of hypertensive brain haemorrhage
Basal ganglia and thalamus
Test to confirm temporal arteritis
temporal arteritis biopsy
Temporal arteritis can be accompined by
rheumatic polymyalgia
Therapy for temporal arteritis
corticoesteroids