Update from education committee

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Presentation transcript:

Update from education committee Train the trainer—content reviewed from Stroke From Arterial Dissection “First Tuesdays” Lecture Series

Introduction and Goal of “First Tuesdays” Sabreena Slavin MD – Vascular Neurologist and Neurohospitalist at KU School of Medicine Craig Bloom RN, BSN, MBA – Senior Clinical Specialist Lytics, Genentech, Inc. Didactic lecture series as part of the Kansas Initiative for Stroke Survival Updates in Practice and FAQ’s on Acute Stroke Care 20 minute didactic, 10 minutes for questions/discussion.

Review of Acute Stroke Interventions IV alteplase (tPA) for all patients who have disabling symptoms of acute stroke Mechanical thrombectomy: only for large vessel occlusions (LVO). Only hospitals with capabilities (eg: comprehensive stroke center) can perform thrombectomy. A higher NIHSS (10 or more) can be indicative of a large vessel occlusion. Diagnosed with CTA head/neck  

Cervical artery dissection Can involve cervical portion of internal carotid artery or vertebral artery Represents about 1/5 of stroke causes in patients younger than 45 Clinical symptoms head/neck/facial pain cerebral and/or retinal symptoms Horner's syndrome (less common) Peng et al, Biomed Res Int 2017 

Horner’s syndrome

Risk factor of dissection Trauma - about half are traumatic neck manipulation coughing/retching Connective tissue disorders: Marfan syndrome, Ehlers-Danlos IV, fibromuscular dysplasia

Nautiyal et al, PLoS Med 2005

Treatment Acute treatment safety with tPA? Anticoagulation vs. antiplatelet What is the timeline of treatment?

Is IV tPA safe for dissection? Meta-analysis of 180 patients with cervical artery dissection (carotid or vertebral) who received intravenous or intra-arterial thrombolysis: sICH rate was 3.1%, overall mortality was 8.1%, rate of excellent outcome with 3 month mRS 0-1 was 41% Compared with age/stroke-severity matched patients with stroke from all causes, safety data for thrombolysis in dissection is similar as thrombolysis in all cases.  Zinstock et al, Stroke 2011

Acute mechanical thrombectomy for dissection? Patients in the Merci device registry: 10 patients with arterial dissection out of 980 6 out of 10 had successful recanalization (denoted by at least 50% recanalization or better).  No sICH or periprocedural stroke occurred. 8 out of 10 had favorable functional outcome (mRS 0-2) at 90 days.  Fields et al, Interv Neurorad 2012

Long term prevention: antiplatelet vs anticoagulation? Patients with carotid or vertebral dissection were randomized to antiplatelet vs. anticoagulation. Results: 3 patients in antiplatelet group had recurrent stroke vs. 1 patient in anticoagulation group had recurrent stroke + 1 patient with anticoagulation had major bleeding.  No statistically significant difference between groups The CADISS trial investigators, Lancet Neurol 2015

Which to choose? Studies do show trends favoring anticoagulation to prevent recurrent stroke, but not statistically significant. No major studies comparing single vs dual antiplatelet Based on provider preference Situation which would favor anticoagulation: free-floating thrombus

Duration of treatment 3-6 months in absence of underlying condition No clear guidelines to stop treatment - signs of healing dissection on imaging can be used as guide

Endovascular stenting for dissection? Involves stenting the dissected portion of the artery May be useful in cases where drug therapy fails or with expanding dissection lesion One study showed that recurrent neurological events post stenting was low at 1.4%. Pham et al, Neurosurgery 2011 

Bottom Line Recognize carotid dissection! Can present only as head/neck pain post trauma without any neurological deficits; low threshold for CTA. If stroke-like symptoms, can consider tPA and acute endovascular intervention. Long term treatment is usually with either antiplatelet or anticoagulation for 3-6 months. 

Questions? Call for help anytime! KU BAT phone: 913-588-3727 http://www.kissnetwork.us/ sslavin2@kumc.edu