#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
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Inflammatory response to Lp retention in arterial wall
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Accelerated accumulation of Lp in subendothelial matrix
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Macrophages
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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)
#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
#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
#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…
☝️#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
#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…
#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
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
#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
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
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