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Response to: Aspirin and Subarachnoid Haemorrhage in the UK Biobank
Source: Translational Stroke Research - August 7, 2023 Category: Neurology Source Type: research

Clopidogrel Is Associated with Reduced Likelihood of Aneurysmal Subarachnoid Hemorrhage: a Multi-Center Matched Retrospective Analysis
We present, to the best of our knowledge, the first large-scale multi-institutional analysis suggesting clopidogrel use is protective against intracranial aneurysm rupture. It is our hope that these data will guide future investigation, revealing the pathophysiologic underpinning of this association.
Source: Translational Stroke Research - July 20, 2023 Category: Neurology Source Type: research

The Effect of the ABCB1(MDR-1) C3435T Polymorphism in Turkish Patients with Aspirin Resistance in Acute Ischemic Stroke
This study aimed to investigate the rate of AR, the factors influencing AR in patients with acute ischemic stroke under regular aspirin use, and the relationship between AR and ABCB1 (MDR-1) C3435T (rs1045642) polymorphism. Throughout this multicenter prospective study, 174 patients with acute ischemic stroke who had been prescribed aspirin for at least one month due to the risk of vascular disease, along with 106 healthy volunteers, were included as part of the study group. The results of our study indicate that AR was detected in 21.3% of the patient group. According to the results of an analysis of the polymorphism of t...
Source: Translational Stroke Research - July 11, 2023 Category: Neurology Source Type: research

Aspirin and Subarachnoid Haemorrhage in the UK Biobank
In this study, we aimed to clarify the association between aspirin and SAH in the general population. The UK Biobank is a prospective population-based cohort study. Sex, age, smoking, alcohol, medication use, hypertension, blood pressure, ischaemic heart disease and stroke were recorded at baseline assessments. Follow-up is conducted through linkages to National Health Service data including electronic, coded death certificate, hospital and primary care data. Cox proportional hazards modelling was used to analyse the association between aspirin use and SAH. Of the 501,060 participants included in the analysis, a total of 5...
Source: Translational Stroke Research - June 29, 2023 Category: Neurology Source Type: research

High On-Treatment Platelet Reactivity as Predictor of Long-term Clinical Outcomes in Stroke Patients with Antiplatelet Agents
AbstractThe purpose was to explore the value of high on-treatment platelet reactivity (HTPR) in predicting long-term clinical outcomes for stroke patients. The platelet reactivity was assayed after being treated with either 75  mg clopidogrel or 100 mg aspirin daily with VerifyNow System in stroke patients. HTPR for clopidogrel was defined as PRU ≥ 208, and that for aspirin was defined as ARU ≥ 550. CYP2C19 genotyping was performed using the Sequenom MassARRAY iPLEX platform. The primary endpoint was a compo site of recurrent ischemic stroke, transient ischemic attack, myocardial infarction, or ischemic vascu...
Source: Translational Stroke Research - October 1, 2021 Category: Neurology Source Type: research

CYP2C19 Loss-of-Function Associated with First-Time Ischemic Stroke in Non-surgical Asymptomatic Carotid Artery Stenosis During Clopidogrel Therapy
This study measures effect ofCYP2C19 genotype on ischemic stroke risk during clopidogrel therapy for asymptomatic, extracranial carotid stenosis patients. Using deidentified electronic health records, patients were selected for retrospective cohort using administrative code for carotid stenosis, availability ofCYP2C19 genotype result, clopidogrel exposure, and established patient care. Patients with intracranial atherosclerosis, aneurysm, arteriovenous malformation, prior ischemic stroke, or observation time<1 month were excluded. Dual antiplatelet therapy patients were included. Patients with carotid endarterectomy or ...
Source: Translational Stroke Research - February 21, 2021 Category: Neurology Source Type: research

Left Atrial Appendage Closure for Patients with Cerebral Amyloid Angiopathy and Atrial Fibrillation: the LAA-CAA Cohort
AbstractAnticoagulation increases the risk of intracerebral hemorrhage (ICH) in patients with cerebral amyloid angiopathy (CAA), so the management of stroke-risk in patients with both atrial fibrillation (AF) and CAA is controversial. Advances in left atrial appendage closure (LAAC) techniques provide a stroke-risk-reduction option which avoids long-term oral anticoagulation (OAC). We aimed to evaluate the safety of this intervention in patients with CAA. This is an observational cohort study of patients with severe CAA (with or without ICH) and AF who were treated with LAA closure. The Watchman ™ and Amulet® LAAC devic...
Source: Translational Stroke Research - August 6, 2020 Category: Neurology Source Type: research

Proteinuria Predicts Resistance to Antiplatelet Therapy in Ischemic Stroke
AbstractThe occurrence of a stroke while on antiplatelet agents presents a therapeutic dilemma. One of the main causes for recurrent strokes is antiplatelet resistance more commonly known as high on treatment platelet reactivity (HTPR). Prior studies have established that proteinuria is associated with HTPR following myocardial infarction. Here, we investigated whether dipstick proteinuria correlates with HTPR in patients presenting with stroke. We performed a retrospective cohort analysis of 102 patients admitted for a recurrent ischemic stroke that had either a VerifyNow aspirin or VerifyNow clopidogrel laboratory test p...
Source: Translational Stroke Research - September 5, 2017 Category: Neurology Source Type: research

Antiplatelet Strategies and Outcomes in Patients with Noncardioembolic Ischemic Stroke from a Real-World Study with a Five-Year Follow-Up
In conclusion, clopidogrel is suggested for patients with an ESRS >  3 and aspirin for patients with an ESRS ≤ 3 for the secondary prevention of noncardioembolic ischemic stroke in Chinese patients.
Source: Translational Stroke Research - December 30, 2016 Category: Neurology Source Type: research

The Effect of Different Doses and Different Routes of Acetylsalicylic Acid Administration on Platelet Aggregation in Healthy Volunteers and Ischemic Stroke Patients
Abstract The purpose was to assess the effect of different doses and different routes of acetylsalicylic acid (ASA) administration on platelet aggregation and the comparison between platelet aggregation after the single and the repetitive administration of ASA in healthy individuals and in patients after ischemic stroke. The study group consists of 22 healthy individuals and 30 patients with documented ischemic stroke. Platelet aggregation was measured in healthy individuals: (a) twice before ASA and (b) 2 h after different single doses and different routes of ASA administration—(b1) 500 mg orally, (b2) 500 m...
Source: Translational Stroke Research - December 19, 2014 Category: Neurology Source Type: research