Ischemic stroke · 2020-04-15 · ischemic injury based on symptoms persisting ≥24 hours or until...
Transcript of Ischemic stroke · 2020-04-15 · ischemic injury based on symptoms persisting ≥24 hours or until...
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Ischemic stroke
P. Turčáni
I. neurologická klinika LF UK a UNB
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Mortality
4,8
22
,7
3,2
10
7,4
25
,7
12,9
0
0,0
5,0
10,0
15,0
20,0
25,0
30,0
LIM ICH SAH Other NT H
%
Male Female
Národný register CMP - NZCI
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Stroke mortality in Slovakia(2011-2014)
NZCI - 2015
KEII 31,7
KEIII 31,7
KEI 34,3
BAI 34,4
BAIV 37,4
KA 121,7
NZ 116,6
SN 115,4
KN 114,0
DS 109,4
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Age distribution
0,4 1,5
5,4
17,3
35
,2
27
,1
11
,9
1,2
0,3 1,0
3,2
8,3
22
,1
33,7
27
,8
3,6
0,0
5,0
10,0
15,0
20,0
25,0
30,0
35,0
40,0
0-30 31-40 41-50 51-60 61-70 71-80 81-90 91+
%
Male Ženy
Národný register CMP - NZCI
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Cerebrovascular events - definitions
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Stroke is classically characterized as a neurological deficit
attributed to an acute focal injury of the central nervous
system (CNS) by a vascular cause, including cerebral
infarction, intracerebral hemorrhage (ICH), and
subarachnoid hemorrhage (SAH).
WHO definition: „rapidly developing clinical signs
of focal (or global) disturbance of cerebral function,
lasting more than 24 hours or leading to death,
with no apparent cause other than that of vascular
origin“. (WHO 1970).
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Cerebrovascular events - definitions
Národný register CMP - NZCI
Definition of CNS infarction: CNS infarction is
brain, spinal cord, or retinal cell death attributable
to ischemia, based on1. pathological, imaging, or other objective evidence of
cerebral, spinal cord, or retinal focal ischemic injury in a
defined vascular distribution; or
2. clinical evidence of cerebral, spinal cord, or retinal focal
ischemic injury based on symptoms persisting ≥24 hours or
until death, and other etiologies excluded.
Ischemic stroke: An episode of neurological
dysfunction caused by focal cerebral, spinal, or
retinal infarction. Sacco RL et al, Stroke 2013, 44, 2064-2089
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Cerebrovascular events - definitions
Národný register CMP - NZCI
Silent CNS infarction: Imaging or
neuropathological evidence of CNS infarction,
without a history of acute neurological dysfunction
attributable to the lesion.
Transient ischemic attack (TIA): a transient
episode of neurological dysfunction caused by
focal brain, spinal cord, or retinal ischemia without
acute infarction.
Sacco RL et al, Stroke 2013, 44, 2064-2089
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Cerebrovascular events - definitions
Národný register CMP - NZCI
Intracerebral hemorrhage: A focal collection of blood within
the brain parenchyma or ventricular system that is not caused
by trauma.
Stroke caused by intracerebral hemorrhage: Rapidly
developing clinical signs of neurological dysfunction
attributable to a focal collection of blood within the brain
parenchyma or ventricular system that is not caused by
trauma.
Silent cerebral hemorrhage: A focal collection of chronic
blood products within the brain parenchyma, subarachnoid
space, or ventricular system on neuroimaging or
neuropathological examination that is not caused by trauma
and without a history of acute neurological dysfunction
attributable to the lesion.Sacco RL et al, Stroke 2013, 44, 2064-2089
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Cerebrovascular events - definitions
Národný register CMP - NZCI
Subarachnoid hemorrhage: Bleeding into the
subarachnoid space (the space between the arachnoid
membrane and the pia mater of the brain or spinal cord).
Stroke caused by subarachnoid hemorrhage: Rapidly
developing signs of neurological dysfunction and/or headache
because of bleeding into the subarachnoid space (the space
between the arachnoid membrane and the pia mater of the
brain or spinal cord), which is not caused by trauma.
Stroke caused by cerebral venous thrombosis: Infarction or hemorrhage in the brain, spinal cord, or retina
because of thrombosis of a cerebral venous structure.
Symptoms or signs caused by reversible edema without
infarction or hemorrhage do not qualify as stroke.
Sacco RL et al, Stroke 2013, 44, 2064-2089
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Cerebrovascular events - definitions
Národný register CMP - NZCI
Stroke, not otherwise specified: An episode of acute
neurological dysfunction presumed to be caused by
ischemia or hemorrhage, persisting ≥24 hours or until
death, but without sufficient evidence to be classified as
one of the above.
Sacco RL et al, Stroke 2013, 44, 2064-2089
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National Stroke Registry - 2018
79%
12% 8%
1%0%
0%0%
Ischemic stroke TIA ICH
SAH other NTH unspecified
not given
Cerebrovascular events - 11 352
Národný register CMP - NZCI
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Ischemic stroke mechanisms
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1. Thrombosis
• Atherosclerosis
• Arteritis and angiopathies
− hypertensive angiopathy (small artery disease)
− amyloid angiopathy
− Non-infectious arteritis - Takeyasu's arteritis,
giant cell arteritis, primary CNS angitis
− systemic diseases - systemic lupus erytemasosus,
polyarteritis nodosa, Wegener granulomatosis, allergic angitis and
granulomatosis, Sjörgren's syndrome, Behcet's syndrome
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Ischemic stroke mechanisms
Národný register CMP - NZCI
1. Thrombosis
• Arteritis and angiopathies
− Drug-induced arteritis
− infectious arteritis - spirochete (syphilis, boreliosis), viral (herpes zoster, HIV), mycotic (aspergillosis, candidiasis, mucormycosis), tuberculosis, malaria, sarcoidosis, rickettsiosis
− cerebral autosomal dominant arteriopathy (CADASIL), Moya-moya syndrome, fibromuscular dysplasia, thrombangiitis obliterans (Buergerdisease)
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Ischemic stroke mechanisms
Národný register CMP - NZCI
1. Thrombosis
• Hematologic diseases
coagulopathy, thrombocytosis, thrombocytopenia, anemia,
hemoglobinopathy, antiphospholipid antibody syndrome
• Hyperviscosity
• Vessel compression - intracranial hypertension
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Ischemic stroke mechanisms
Národný register CMP - NZCI
2. Embolization
• Artery to artery embolizationatherosclerosis
• Cardiogenic embolizationmyocardial infarction, sick-sinus syndrome, dysrhythmias, valvular heart disease, infectious and marantic endocarditis, left-sided ventricular myxoma ,
• Other sourcepulmonary arteriovenous malformations, thrombosis of pulmonary veins, pulmonary and mediastinal tumors
• Fat embolism, air embolism, hypercoagulation states
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Ischemic stroke mechanisms
Národný register CMP - NZCI
3. Hypoperfusion
• Cerebral arteriospasms – subarachnoid bleeding, migraine, eclampsia, trauma
• Cerebral artery stenosis - atherosclerosis, hypertension, arteriopathy
• Hyperviscosity- polycythemia, myeloproliferative
dysproteinemia, hyperfibrinogenemia, dehydration
• Cerebral venous sinus thrombosis
• Intracranial hypertension
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Ischemic stroke – I63
43%
24%
11%
11%
2% 9%
Atherothrombotic Cardioembolic Lacunar
Cryptogenic Other not determined
(I63.0-I63.9),(G46.0-G46.8) – 9254
Národný register CMP - NZCI
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Ischemic stroke
Národný register CMP - NZCI
Bilateral thalamic infarction
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Ischemic stroke
Národný register CMP - NZCI
infarction in a. cerebri posterior
teritory
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Ischemic stroke
Národný register CMP - NZCI
Lacunar infarction
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Ischemic stroke
Národný register CMP - NZCI
Infarction in pons
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Principles of acute stroke care
Národný register CMP - NZCI
• Immediate diagnosis and evaluation
- focused neurological examination
- immediate diagnostic tests:
Non-contrast CT(MRI)
ECG
Chest X-ray
LP (if SAH is suspected
and CT is negative
EEG (if seizures are
suspected)
Hematology.
(CBC, PT, PTT, aPTT, TT, ECT)
Biochemistry
(blood sugar, electrolytes,
hepatic and renal function tests,
acid base balance)
Toxicology screen
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Principles of acute stroke care
Národný register CMP - NZCI
• Immediate diagnosis and evaluation
• Focused therapy
- reperfusion
- pharmacotherapy
- surgical interventions
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Reperfusion treatment
Cerebral ischemia leads every minute to loss of :
- 1.9 million neurons
- 13,8 billion synaptic connections
- 12 km axonal fibers
iv thrombolysis mechanical thrombectomy
Early reperfusion reduces extent of ischemic
damage
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Immediate Diagnostic Studies
All patients
• non-contrast CT or MR, CTAg
• Blood glucose
• Oxygen saturation
• Serum electrolytes/renal function
test
• Complete blood count (Plt)
• Markers of cardiac ischemia
• PT/INR
• aPTT
• ECG
Selected patients
• TT and/or ECT (NOAK)
• Hepatíc function tests
• Toxicology screen
• Blood alcohol level
• Pregnancy test
• pO2 (if hypoxia is suspected)
• Chest X-ray (if lung disease is suspected)
• Lumbar puncture (SAH)
• EEG (if seizures are suspected)
Only blood glucose must precede rtPA
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Early CT signs of cerebral ischemiaHypoattenuating brain tissue Obscuration of the lentiform
nucleus
Insular Ribbon sign Dense MCA sign
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CTAg and CT perfusion
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MRI
T2 FLAIR
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Therapy
• Reperfusion therapy
- thrombolysis
- mechanical thrombectomy
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Mechanical Thrombectomy
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Solitaire stent retriever
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Removal of blood clot
Dr. Coleman Martin at the Saint Luke's Brain and Stroke Institute in
Kansas City, Missouri
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Thrombolytic therapy in Slovakia 2018
(20,9%)
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Endovascular therapy in Slovakia 2018 (9,4%)
performing institutions
referring institutions
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Pharmacotherapy
• Antiplatelet agents (300 - 500 mg ASA single dose, than 100 – 300 mg daily,
Clopidogrel 1x75 mg)
• Neuroprotective agents(MgSO4 0,4 – 0,8 mMol/kg, statins – atorvastatin 1x80 mg,
Cerebrolysine 50 ml iv/day 5-10 days), Piracetam 12 g (fatic
disorders)
• Hemorheologic agents, vasodilators
• Anticoagulants
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Surgical Interventions
• Decompressive surgical evacuation of a space-
occupying cerebellar infarction is effective in
preventing and treating herniation and brain
stem compression
• Decompressive surgery for malignant edema of
the cerebral hemisphere is effective and
potentially lifesaving
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Surgical Interventions
• Carotid endarterectomy - The usefulness of
emergent or urgent CEA when clinical indicators
or brain imaging suggests a small infarct core
with large territory at risk (eg, penumbra),
compromised by inadequate flow from a critical
carotid stenosis or occlusion, or in the case of
acute neurological deficit after CEA, in which
acute thrombosis of the surgical site is
suspected, is not well established
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Principles of acute stroke care
Národný register CMP - NZCI
• Immediate diagnosis and evaluation
• Focused therapy
• Intensive non-specific care and
complication treatment
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Frequent complications
General:
• Aspiration, hypoventilation, pneumonia
• Myocardial infarction, arrhythmias
• Deep vein thrombosis, pulmonary embolization
• Urinary tract infection
• Decubitus ulcers
• Malnutrition
• Contractures, joints fibrotic changes
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Frequent complications
Neurologic:
• Cerebral edema
• Intracranial hypertension
• Hydrocephalus
• Hemorrhagic transformation
• Seizures
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General supportive care
• Maintenance of adequate tissue oxygenation
• Stabilization of BP – antihypertensive agents
only if sBP > 220 mm Hg, resp. dTK >130 mm Hg
• Sources of hyperthermia should be identified
and treated – antipyretic medications, antibiotics
• Maintenance of euvolemia, correction of
blood sugar
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Non-specific care
• Management of cerebral edema
hyperventilation, osmotic diuretics, hypertonic
saline
• Management of seizures - carbamazepine,
phenytoin (not prophylactic use)
• GIT bleeding prophylaxis
• DVT and PE prophylaxis
• Infection prevention
• Prevention of decubitus ulcers
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© Turčáni 2020
Non-specific care
• Bladder and bowel care
• Nutrition and hydration
• Prevention of contractures and
• Sedation and pain management
• Early mobilization and speech therapy