#WeekendLecture
#CarotidArteryDisease #CAD

#CAD causes ~ 10-20% of #strokes
Atherosclerosis occurs most frequently at carotid #bifurcation, an area of low vessel-wall shear stress and oscillatory/turbulent blood flow

Welcome to this mini review!
#WeekendLecture
#CAD
Endothelial dysfunction
⬇️
Inflammatory response to Lp retention in arterial wall
⬇️
Accelerated accumulation of Lp in subendothelial matrix
⬇️
Macrophages
⬇️
VSCM migrate/proliferate to fibroblast-like cells👉 production of EC matrix
atm.amegroups.com/article/view/7…
#WeekendLecture
#CAD
Stroke Mechanisms
#artery_to_artery embolization: retinal (amaurosis fugax) or cerebral circulation
#thrombosis in situ
#Flow reduction in high grade stenosis: #watershed infarcts, repetitive and brief TIAs (ie limb shaking)

nejm.org/doi/full/10.10…
#WeekendLecture
#CAD
Carotid stenosis can be diagnosed using certain non- invasive modalities including
#duplex ultrasound jvascsurg.org/article/S0741-…
#CTA ahajournals.org/doi/full/10.11…
#MRA sciencedirect.com/science/articl…
Digital subtraction #angiography is the gold #standard modality
#WeekendLecture
#CAD
The most important information gained from imaging test is % of #stenosis
The measurement method used in the North American Symptomatic Carotid Endarterectomy Trial #NASCET is used most widely
The #ECST used different criteria

thelancet.com/journals/lance…
#WeekendLecture
#CAD
#NASCET👉#CEA for preventing stroke in symptomatic patients w/ TIAs/minor strokes
✅ARR 17% for ipsilateral stroke in high-grade 70–99% stenosis
👉ARR 7.8% if 50-69%
No benefit for stenosis <50%
#ECST & #VACS provided similar results

nejm.org/doi/full/10.10…
#WeekendLecture
#CAD
Based on a pool analysis from #NASCET and #ECST, Rothwell & cols from CETC found that benefit from #endarterectomy depends not only on the degree of carotid stenosis, and was greatest in:
👉Men
👉>75yo
👉<2 weeks after ischemic event
thelancet.com/journals/lance…
#WeekendLecture
#CAD
Carotid artery #stenting was introduced as a less invasive treatment alternative
In #symptomatic stenosis, CAS showed higher risk of stroke/death within 30d vs CEA
Beyond 30d, CAS is as #effective in preventing recurrent stroke as CEA
ahajournals.org/doi/10.1161/ST…
#WeekendLecture
#CAD
The risk of ischemic stroke is determined not only by the degree of vessel stenosis but also by plaque morphology
👉ahajournals.org/doi/10.1161/ST…
Advances in carotid imaging look for signs of plaque #vulnerability
#unstable
👉thejns.org/view/journals/…
#WeekendLecture
#CAD
☝️It is very important to recognize that patients with symptomatic CAD should not only be evaluated for CEA/CAS.
✅Medical management has improved to a large extent in:
👉Antiplatelets
👉Lipid management
👉Other RFs: HTN,DM, smoking
link.springer.com/article/10.100…
#WeekendLecture
#CAD
Advances in #medical management
✅antiplatelet therapy
✅high-potency statin use
✅targeted BP treatment
✅lifestyle modification
are currently being evaluated in #asymptomatic patients vs #revascularization in @CREST2_Study and #ECST2
journals.sagepub.com/doi/10.1177/17…

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More from @WorldStrokeEd

15 Aug
#WeekendLecture
Stroke outcome #prognostication

☝️#Stroke clinicians are routinely asked by patients and families regarding prognosis.
🧠The cognitive process underlying prognostication is #complex, poorly understood, and sometime #biased by personal experiences Image
#WeekendLecture
#StrokePrognostication

#Fact: Clinicians, even those with expertise in stroke, perform poorly in predicting clinical outcomes
In this case-based study, overall accuracy for predicting death or disability at discharge was <20%😩
#JURaSSIC
n.neurology.org/content/81/5/4… Image
#WeekendLecture
#StrokePrognostication

☝️Several prognostic #models have been developed to aid prognostication after ischemic stroke
These models #outperform clinician #judgment in predicting stroke outcomes
ie:
onlinelibrary.wiley.com/doi/10.1111/en…
@GeorgeNtaios Image
Read 12 tweets
1 Aug
#WeekendLecture
#PregnancyAndStroke

#Pregnancy and #puerperium confer an ⬆️ risk for ischemic as well as hemorrhagic stroke, with incidence rates being 3-fold higher as compared with nonpregnant women

👉doi.org/10.1016/j.ncl.…

a short 🧵 Image
#WeekendLecture
#PregnancyAndStroke

@DrRickSwartz @patrice_lindsay et al metaanalysis
👉11 studies
👉>85 million #pregnancy and #postpartum admissions in various countries
👉overall incidence of #stroke was 30 per 100,000 hospitalizations👈
@IntJStroke

journals.sagepub.com/doi/10.1177/17… ImageImage
#WeekendLecture
#PregnancyAndStroke
RFs:
☑️Age, >40yo OR3.1
☑️Race/ethnicity
☑️Migraine, thrombophilia, SLE, 🫀disease, HTN, thrombocytopenia, diabetes
☑️Pregnancy complications
✅For hemorrhagic stroke: aneurysms, AVM, Hypertensive Disorders of Pregnancy

journals.lww.com/greenjournal/F… ImageImage
Read 12 tweets
18 Jul
#WeekendLecture
#CerebralMicrobleeds #CMB

Radiological construct: small (2–10 mm diameter) round or ovoid #hypointense foci with associated #blooming with enhanced visibility on #MRI sequences sensitive to #susceptibility effects

thelancet.com/journals/laneu… ImageImage
#WeekendLecture
#CMB
🔬#Pathology: recent or old microhaemorrhages
🩸Microvessel injuries, ie: dilatation/fragmentation of the wall, amyloid-ß (in CAA) and fibrin extravasation
🩸Extravasation of red blood cells
🩸#hemosiderin-laden macrophages
karger.com/Article/FullTe… ImageImage
#WeekendLecture

In daily practice #CMB represents a radiological marker of #small vessel disease

In general:
🩸Strictly #lobar CMBs👉CAA
🩸Strictly #deep👉hypertension-related SVD ie #arteriolosclerosis
🩸Mixed 👉combination👆, but must think #hereditary #SVD, ie #CADASIL Image
Read 8 tweets
12 Jul
This is a very late #WeekendLecture
but you can review it anytime you want😉
🧠#Aneurysm & #Subarachnoid Hemorrhage
Unruptured intracranial aneurysms are pathologic dilations at major branching brain arteries
~3% of adult population
nejm.org/doi/full/10.10…
thelancet.com/journals/lance… Image
#WeekendLecture
#Aneurysms & #SAH
The most common presentation of intracranial aneurysm is rupture leading to #SAH
The risk of rupture depends on patient and aneurysm related factor, ie: age/gender/location/size/growth, etc
🧠ahajournals.org/doi/10.1161/ST…
🧠journals.lww.com/continuum/Abst… Image
#WeekendLecture
#Aneurysms & #SAH
It is well known that endovascular or neurosurgical management of #unruptured intracranial aneurysm is not free of procedural #complications
This study investigates risk factors for this complications @JAMANeuro
👇
jamanetwork.com/journals/jaman… ImageImage
Read 10 tweets
4 Jul
#WeekendLecture
#ESUS
In most studies ~25% of ischemic stroke are classified as #cryptogenic
In 2014 the Embolic Stroke of Undetermined Source clinical construct was introduced, as a subset from cryptogenics
Criteria & diagnostic assessment were proposed

thelancet.com/journals/laneu… ImageImage
#WeekendLecture
#ESUS

Although a long list of causes was described, covert AF was conceived as perhaps the most important underlying mechanism
It was hypothesized that oral #anticoagulation may⏬ the risk of stroke recurence in #ESUS Image
#WeekendLecture
#ESUS

A systematic review in 2017 (from several authors of the pivotal paper) showed:
👉Frequency: 17% (9-25%) of IS
👉Mean age: 65
👉Recurrence: 4.5% per year
👉Younger, lower freq of vascular RFs and milder stroke vs non-ESUS IS

ahajournals.org/doi/10.1161/st… Image
Read 8 tweets

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