Abstract W P374: Coated-Platelet Levels Correlate With HAS-BLED Scores in Stroke Patients With Atrial Fibrillation

Background: Coated-platelets are a subset of procoagulant platelets observed upon dual agonist stimulation with collagen and thrombin. Coated-platelet levels are increased in non-lacunar ischemic stroke compared to controls; however, patients with early hemorrhagic transformation have lower coated-platelet levels than those without. In contrast to brain infarction, coated-platelet levels are decreased in intracerebral hemorrhage and inversely correlated with the size of the bleed. Because anticoagulation is a key preventive treatment in cardioembolic stroke, we investigated the existence of a relationship between coated-platelets and bleeding risk in stroke patients with atrial fibrillation. Methods: Coated-platelet levels, reported as percent of platelets converted to coated-platelets, were determined in 45 consecutive patients with acute stroke and atrial fibrillation. Exclusion criteria consisted of dementia, stroke due to other causes than atrial fibrillation, > 96 hours between onset of symptoms and coated-platelet assay, current anticoagulation, prior thrombolytics or abnormal PT/PTT/INR. Bleeding risk was determined for each patient using the HAS-BLED score. The correlation between individual coated-platelet levels and HAS-BLED scores was determined using the Pearson correlation coefficient. Results: Coated-platelet levels for the 45 patients were 41.0 ± 13.9% (mean ± SD, range 13.2 to 69.7%), consistent with previous data in patients with non-lacunar ischemic stroke. Mean HAS-BLED score was 3.2 ± 1.6, with a range between 1 and 7. A highly significant inverse linear correlation between coated-platelet levels and HAS-BLED scores was observed (p < 0.001, r = -0.67). Conclusions: Lower coated-platelet levels correlate with higher HAS-BLED scores in patients with stroke due to atrial fibrillation, suggesting that decreased coated-platelet synthesis is present in patients with an increased risk for bleeding. Our results are consistent with previously published research showing lower coated-platelet levels in intracerebral hemorrhage and early hemorrhagic transformation of ischemic stroke, and support a role played by this subset of activated platelets in the balance between thrombosis and hemorrhage.

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Abstract P12: Alteplase Reduces Mortality in Patients With Ischemic Stroke and Atrial Fibrillation: Analysis of the IAC Study

Stroke ◽

10.1161/str.52.suppl_1.p12 ◽

2021 ◽

Vol 52 (Suppl_1) ◽

Author(s):

Shadi Yaghi ◽

Eva Mistry ◽

Adam H De Havenon ◽

Christopher Leon Guerrero ◽

Amre Nouh ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Infarct Volume ◽

Intravenous Thrombolysis ◽

The United States ◽

Hemorrhagic Transformation ◽

Stroke Patients ◽

Increased Risk ◽

Significant Difference

Background and Purpose: Multiple studies have established that intravenous thrombolysis with alteplase improves outcome after acute ischemic stroke. However, assessment of thrombolysis’ efficacy in stroke patients with atrial fibrillation (AF) has yielded mixed results. We sought to determine the association of alteplase with mortality, hemorrhagic transformation (HT), infarct volume, and mortality in patients with AF and acute ischemic stroke. Methods: We retrospectively analyzed consecutive acute ischemic stroke patients with AF included in the Initiation of Anticoagulation after Cardioembolic stroke (IAC) study, which pooled data from 8 comprehensive stroke centers in the United States. 1889 (90.6%) had available 90-day follow up data and were included. For our primary analysis we used a cohort of 1367/1889 (72.4%) patients who did not undergo mechanical thrombectomy (MT). Secondary analyses were repeated in the patients that underwent MT (n=522). Binary logistic regression was used to determine whether alteplase use was independently associated with risk of HT, final infarct volume, and 90-day mortality, respectively, adjusting for potential confounders. Results: In our primary analyses we found that alteplase use was independently associated with an increased risk for HT (adjusted OR 2.14, 95% CI 1.49 - 3.07, p <0.001) but overall reduced risk of 90-day mortality (adjusted OR 0.58, 95% CI 0.39 - 0.87, p = 0.009). Among patients undergoing MT, alteplase use was associated with a trend towards a reduction in 90-day mortality (adjusted OR 0.68 95% CI 0.45 - 1.04, p = 0.077). In the subgroup of patients prescribed DOAC treatment (n = 327; 24 received alteplase), alteplase treatment was associated with a trend towards smaller infarct size (< 10 mL), (adjusted OR 0.40, 95% CI 0.15 - 1.12, p = 0.082) without a significant difference in the odds of 90-day mortality (adjusted OR 0.51, 95% CI 0.12 - 2.13, p = 0.357) or hemorrhagic transformation (adjusted OR 0.27, 95% CI 0.03 - 2.07, p = 0.206). Conclusion: Thrombolysis with intravenous alteplase was associated with reduced 90-day mortality in AF patients with acute ischemic stroke not undergoing MT. Further study is required to assess the safety and efficacy of alteplase in AF patients undergoing MT and those on DOACs.

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Analysis of Influencing Factors of Compliance with Non-Vitamin K Antagonist Oral Anticoagulant in Patients with Nonvalvular Atrial Fibrillation and Correlation with the Severity of Ischemic Stroke

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2021/1021127 ◽

2021 ◽

Vol 2021 ◽

pp. 1-7

Author(s):

Li Zhu ◽

Xiaodan Zhang ◽

Jing Yang

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Influencing Factors ◽

Clinical Supervision ◽

Vitamin K ◽

Pearson Correlation ◽

Anticoagulation Therapy ◽

Vitamin K Antagonist ◽

Nonvalvular Atrial Fibrillation ◽

Increased Risk

Nonvalvular atrial fibrillation (NVAF) is associated with an increased risk of stroke and thrombus, and anticoagulant therapy is a key link in the prevention of stroke. At present, the anticoagulation rate of atrial fibrillation in China is low, and there are many factors affecting the adherence of patients with atrial fibrillation to anticoagulation. Non-vitamin K antagonist oral anticoagulants (NOACs) are anticoagulant with high application value due to their high safety and low risk of intracranial hemorrhage, stroke, and death. However, the compliance of NOACs is poor, and the current situation of anticoagulants in China is not optimistic. In this study, a total of 156 patients with NVAF who received NOAC anticoagulation therapy in our hospital from January 2018 to January 2019 were retrospectively analyzed. The results showed that education background, place of residence, number of complications, CHA2DS2-VASc score, and HAS-BLED score were independent influencing factors for NOACS compliance of NVAF patients. Also, the Pearson correlation analysis showed that there was a negative correlation (r = −0.465, P < 0.001 ) between NOAC compliance and severity of ischemic stroke in patients with NVAF. Therefore, clinical supervision and management of patients with NVAF after NOACs should be strengthened to improve the compliance of patients with NVAF after NOACs, reduce the damage of ischemic stroke, and improve their prognosis.

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Impact of the Total Number of Carotid Plaques on the Outcome of Ischemic Stroke Patients with Atrial Fibrillation

Journal of Clinical Medicine ◽

10.3390/jcm8111897 ◽

2019 ◽

Vol 8 (11) ◽

pp. 1897 ◽

Cited By ~ 1

Author(s):

Hyungjong Park ◽

Minho Han ◽

Young Dae Kim ◽

Joonsang Yoo ◽

Hye Sun Lee ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Intima Media Thickness ◽

Major Adverse Cardiovascular Events ◽

Stroke Patients ◽

Term Outcome ◽

Long Term Outcome ◽

Increased Risk ◽

Prognostic Utility

Background: Atrial fibrillation (AF) shares several risk factors with atherosclerosis. We investigated the association between total carotid plaque number (TPN) and long-term prognosis in ischemic stroke patients with AF. Methods: A total of 392 ischemic stroke patients with AF who underwent carotid ultrasonography were enrolled. TPN was assessed using B-mode ultrasound. The patients were categorized into two groups according to best cutoff values for TPN (TPN ≤ 4 vs. TPN ≥ 5). The long-term risk of major adverse cardiovascular events (MACE) and mortality according to TPN was investigated using a Cox hazard model. Results: After a mean follow-up of 2.42 years, 113 patients (28.8%) had developed MACE and 88 patients (22.4%) had died. MACE occurred more frequently in the TPN ≥ 5 group than in the TPN ≤ 4 group (adjusted hazard ratio [HR], 1.50; 95% confidence interval [CI], 1.01–2.21; p < 0.05). Moreover, the TPN ≥ 5 group showed an increased risk of all-cause mortality (adjusted HR, 2.69; 95% CI, 1.40–5.17; p < 0.05). TPN along with maximal plaque thickness and intima media thickness showed improved prognostic utility when added to the variables of the CHAD2DS2-VASc score. Conclusion: TPN can predict the long-term outcome of ischemic stroke patients with AF. Adding TPN to the CHAD2DS2-VASc score increases the predictability of outcome after stroke.

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Hemorrhagic transformation predictors in ischemic stroke patients from a Stroke Unit

10.5327/1516-3180.659 ◽

2021 ◽

Author(s):

Fernanda Ferreira de Abreu ◽

Vinícius Bessa Mendez ◽

Ivã Taiuan Fialho Silva ◽

Alice Monteiro Soares Cajaíba ◽

Pedro Antonio Pereira de Jesus

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Ct Scan ◽

Computer Tomography ◽

Prospective Cohort ◽

Stroke Unit ◽

Hemorrhagic Transformation ◽

Stroke Patients ◽

Nihss Score ◽

Toast Classification

Background: Hemorrhagic transformation (HT) is an aggravating factor to patients with ischemic stroke. For patients’ best care, it’s essential to know its predictors. Objective: To describe HT in patients with ischemic stroke. Design and setting: Prospective cohort with ischemic stroke patients from a Stroke Unit, admitted between 2017 to 2019. Methods: All patients performed a brain computer tomography (CT) scan on arrival and 24-hours later. Patients with or without HT were compared for predictors. Results: 363 patients were included, with a mean age of 63,14 (±13,92), 53,1% were male and 9,9% (n= 38) had HT. Thrombolysis didn’t increase the risk of HT [(55,3% vs 42,5%); p= 0,132]. Patients with atrial fibrillation [(31,6% vs 12,6%); p= 0,002], and cardioembolic etiology according with TOAST classification [(57,6% vs 21,7%); p< 0,001] had higher risk of HT. Patients with HT had lower ASPECTS scores on their initial CT [8 (6-9) vs 9 (8-10); p< 0,001] and higher NIHSS scores [12 (9-15) vs 8 (5-12); p< 0,001]. Cardioembolic strokes [OR= 4,67; (IC95% 2,01-10,84)] and higher NIHSS [OR= 1,11; (IC95% 1,01-1,22)] were independently associated with HT after multivariate adjustments, considering ASPECTS and thrombolysis. Conclusion: Cardioembolic etiology and higher NIHSS score were independently associated with HT. It’s essential to know HT predictors due to worse outcomes associated with its occurrence.

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Reduction in the Ratio of Low-density Lipoprotein Cholesterol to Highdensity Lipoprotein Cholesterol is Associated with Increased Risks of Hemorrhagic Transformation in Patients with Acute Ischemic Stroke

Current Neurovascular Research ◽

10.2174/1567202616666190619151914 ◽

2019 ◽

Vol 16 (3) ◽

pp. 266-272 ◽

Cited By ~ 3

Author(s):

Yanan Wang ◽

Chenchen Wei ◽

Quhong Song ◽

Junfeng Liu ◽

Yajun Cheng ◽

...

Keyword(s):

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Low Density Lipoprotein ◽

Density Lipoprotein ◽

Hemorrhagic Transformation ◽

Lipoprotein Cholesterol ◽

Low Density ◽

Low Density Lipoprotein Cholesterol ◽

Stroke Patients ◽

Increased Risk

Background and Purpose: Hemorrhagic transformation (HT) is a potentially serious complication in patients with acute ischemic stroke (AIS). Whether the ratio of low-density lipoprotein cholesterol to high-density lipoprotein cholesterol (LDL-C/HDL-C) is associated with HT remains unclear. Methods: Ischemic stroke patients within 7 days of stroke onset from January 2016 to November 2017 were included in this study. Lipid profiles were measured within 24h after admission. HT was determined by a second computed tomography or magnetic resonance imaging within 7 days after admission. Univariate and multivariate logistic regression analysis was used to assess the association between LDL-C/HDL-C and HT. Results: We enrolled 1239 patients with AIS (788 males; mean age, 64 ± 15 years), of whom 129 (10.4%) developed HT. LDL-C/HDL-C was significantly lower on admission in patients with HT than those without HT (2.00 ± 0.89 vs. 2.25 ± 1.02, P=0.009). The unadjusted odds ratio (OR) of low LDL-C/HDL-C for HT was 2.07 (95% confidence interval [CI] 1.42-3.01, P＜0.001). After adjustment for possible confounders, lower LDL-C/HDL-C (≤1.52) was significantly associated with HT (OR 1.53, 95% CI: 1.02-2.31, P=0.046). Similar results were observed between lower LDL-C (≤ 4 mmol/L) and HT (OR 4.17, 95% CI: 1.25-13.90, P=0.02). However, no significant association was found between HT and high HDL-C, low triglycerides or low total cholesterol. Conclusion: Lower LDL-C/HDL-C and LDL-C were significantly associated with increased risk of HT after AIS. Further investigations are warranted to confirm these findings and then optimize lipid management in stroke patients with lower LDL/HDL-C or LDL-C.

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Newly Detected Atrial Fibrillation after Acute Stroke: A Narrative Review of Causes and Implications

Cardiology ◽

10.1159/000502971 ◽

2019 ◽

Vol 144 (3-4) ◽

pp. 112-121 ◽

Cited By ~ 1

Author(s):

Youcheng Wang ◽

Yongsheng Qian ◽

Daniel Smerin ◽

Shujuan Zhang ◽

Qingyan Zhao ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Acute Stroke ◽

Adverse Outcomes ◽

Stroke Recurrence ◽

Stroke Patients ◽

Increased Risk ◽

Definition Of ◽

Humoral Regulation

Cardiac arrhythmias occur frequently in patients with acute stroke, with atrial fibrillation (AF) being the most common. Newly detected AF may lead to increased risk of ischemic stroke, which in turn generates stroke recurrence and adverse outcomes. Currently, most studies are focusing on the role of AF in ischemic stroke and attributing cryptogenic ischemic stroke to previously undetected AF. However, in these studies, subjects used to have neither symptoms of palpitation nor evidence of AF. A better understanding of this association will contribute to the management and therapy for patients after clinical decisions regarding stroke patients. Currently, the definition of newly detected AF has not come to an agreement, and the pathophysiology remains incompletely understood, possibly involving complex alterations in both the autonomic network and humoral regulation. Therefore, this review aims to introduce the definition and epidemiology of newly detected AF after stroke with updated information and elucidate the potential pathophysiology, such as autonomic imbalance, catecholamine surge, poststroke systematic inflammation, and microvesicles and microRNAs.

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Genetically Predicted Cardiac Troponin I Concentrations and Risk of Stroke and Atrial Fibrillation

10.21203/rs.3.rs-699688/v1 ◽

2021 ◽

Author(s):

Dandan Liu ◽

Yue Deng ◽

Jiao Wang ◽

Yanan Chen ◽

Jian Yu ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Intracerebral Hemorrhage ◽

Cardiac Troponin ◽

Troponin I ◽

Mendelian Randomization ◽

Cardiac Troponin I ◽

Cardioembolic Stroke ◽

Large Artery ◽

Increased Risk

Abstract Background: Observational studies have shown that elevated circulating cardiac troponin I (cTnI) concentrations were associated with higher risk of stroke and atrial fibrillation, but the causality remains unclear. Therefore, we conducted a two-sample mendelian randomization study to evaluate the causal effects of cTnI concentrations on the risk of stroke subtypes and atrial fibrillation.Methods: The instrumental variables for circulating cTnI concentrations were selected from a genome-wide association study meta-analysis of 48,115 European individuals. Applying a 2-sample mendelian randomization approach, we examined the associations of circulating cTnI concentrations with stroke (40,585 cases and 406,111 controls), ischemic stroke (34,217 cases and 406,111 controls), ischemic stroke subtypes (cardioembolic, large artery, small vessel stroke), intracerebral hemorrhage (1,545 cases and 1,481 controls) and atrial fibrillation (60,620 cases and 970,216 controls). Results: Genetically predicted elevated circulating cTnI concentrations were associated with increased risk of cardioembolic stroke (odds ratio [OR], 1.80; 95% confidence interval [CI], 1.20-2.68; P = 0.004). However, no significant association was observed for cTnI concentrations with large artery stroke, small vessel stroke, total stroke, ischemic stroke and intracerebral hemorrhage. Additionally, we also found that elevated cTnI concentrations were associated with higher risk of atrial fibrillation (OR, 1.30; 95% CI, 1.10-1.53; P = 0.003).Conclusions: This study provides evidence that genetically predicted circulating cTnI concentrations are causally associated with increased risk of cardioembolic stroke and atrial fibrillation.

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Hemorrhagic transformation in ischemic stroke and its treatment during thrombolysis

Reviews in Health Care ◽

10.7175/rhc.v2i1s.39 ◽

2011 ◽

Vol 2 (1S) ◽

pp. 99-107

Author(s):

Maurizio Paciaroni ◽

Luca Masotti ◽

Valeria Caso

Keyword(s):

Ischemic Stroke ◽

Brain Infarction ◽

Hemorrhagic Transformation ◽

Stroke Patients ◽

Adequate Treatment ◽

Haemorrhagic Transformation ◽

Hemorrhagic Infarction ◽

Brain Infarcts ◽

Secondary Bleeding ◽

Key Points

Haemorrhagic transformation (HT) of brain infarction or hemorrhagic infarction is a complication of acute ischemic stroke, especially in cardioembolic stroke, and represents the most feared complication of thrombolysis. HT is a multifocal secondary bleeding into brain infarcts with innumerable foci of capillary and venular extravasation either remaining as discrete petechiae or emerging to form confluent purpura. HT is evidenced as a parenchymal area of increased density within an area of low attenuation in a typical vascular distribution on non-contrasted CT scans and is subdivided into two major categories on the basis of standardised definition: haemorrhagic infarct (HI) and parenchymal haematoma (PH). PH has been associated to poor outcome in ischemic stroke patients. Thus, its prevention, early detection and adequate treatment represent key points in the management of acute stroke.

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Outcome of intravenous thrombolysis for acute ischemic stroke in patients with and without atrial fibrillation

Medicinski pregled ◽

10.2298/mpns1708203z ◽

2017 ◽

Vol 70 (7-8) ◽

pp. 203-208

Author(s):

Zeljko Zivanovic ◽

Dragan Adamovic ◽

Aleksandra Lucic-Prokin ◽

Timea Kokai-Zekic ◽

Jelena Sekaric ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Intravenous Thrombolysis ◽

Binary Logistic Regression ◽

Neurological Status ◽

Stroke Patients ◽

Severe Stroke ◽

Increased Risk ◽

Favorable Clinical Outcome

Introduction. Atrial fibrillation is associated with an increased risk of ischemic stroke. The benefit of intravenous thrombolysis in patients with acute ischemic stroke and atrial fibrillation is still unclear. The aim of the study was to assess and compare the effects of intravenous thrombolysis in stroke patients with and without atrial fibrillation. Material and Methods. We analyzed stroke patients who were treated with intravenous thrombolysis. Patients were divided into two groups according to the presence of atrial fibrillation. Demographic, clinical and radiological characteristics of patients were compared between the two groups. The treatment efficacy was evaluated in relation to the improvement of neurological status after 24 hours, and functional recovery after three months. Binary logistic regression was used to evaluate predictors of outcome. Results. From a total of 188 patients, 39.4% presented with atrial fibrillation. Patients with atrial fibrillation were older (69.4 vs. 62.6 years; p <0.0001), with female predominance (43.2% vs. 28.9%, p = 0.04) and had clinically more severe stroke (National Institutes of Health Stroke Scale, score on admission 15.4 vs. 12.1; p = 0.0001). Significantly more patients without atrial fibrillation (61.4% vs. 43.2%, p = 0.01) had a favorable clinical outcome at three months after stroke. Nevertheless, atrial fibrillation was not an independent predictor of poor outcome at three months after stroke (p=0.66). Conclusion. Acute ischemic stroke patients, with atrial fibrillation, treated with intravenous thrombolysis, had worse outcomes than patients without atrial fibrillation did. However, it is mainly due to older age and a more severe stroke in patients with atrial fibrillation.

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Abstract 1910: Hyperperfusion in Acute Ischemic Stroke: Serial Arterial Spin-Labeled MRI of Reperfusion and Hemorrhagic Transformation

Stroke ◽

10.1161/str.43.suppl_1.a1910 ◽

2012 ◽

Vol 43 (suppl_1) ◽

Author(s):

David S Liebeskind ◽

Danny J Wang ◽

Nerses Sanossian ◽

Albert K Fong ◽

Qing Hao ◽

...

Keyword(s):

Atrial Fibrillation ◽

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Hemorrhagic Transformation ◽

Consecutive Series ◽

Imaging Features ◽

Stroke Patients ◽

Clinical Correlates ◽

Scan Time

Background: Arterial spin-labeled (ASL) MRI facilitates repeated noninvasive evaluation of cerebral blood flow without the use of contrast. Hyperperfusion may be readily detected with ASL and serial imaging may therefore chronicle the dynamics of territorial perfusion from acute to chronic phases after stroke. We characterized hyperperfusion on ASL in a prospective series of acute ischemic stroke patients, describing the clinical correlates, time course and association with reperfusion hemorrhage. Methods: A consecutive series of acute ischemic stroke patients admitted during a 1-year period were evaluated with pseudo-continuous ASL with background suppressed 3D GRASE (delay=2s, matrix=64x64; 26 slices, resolution 3.4x3.4x5mm, scan time 4min). Post-processed ASL CBF maps were visually inspected for detection of hyperperfusion. DSA measures of collaterals and reperfusion were scored when available and hemorrhagic transformation (HT) was graded on GRE in all 198 cases. Univariate and multivariate statistical analyses delineated clinical correlates, timing and other imaging features of hyperperfusion. Results: Among 198 patients, mean age was 69.4±15.7 years and 48.5% were women. Among 77 with serial ASL MRI, interval from initial to follow-up MRI was median 25.0 (IQR 10.3-53.9) hours. Hyperperfusion was detected in 15/198 (7.6%) patients at baseline and 30/77 (39.0%) at follow-up. Trajectories included 7/77 (9.1%) with hyperperfusion at both baseline and follow-up and 38/77 (49.4%) showing hyperperfusion at any timepoint during admission. Hyperperfusion correlated with achievement of reperfusion among patients undergoing endovascular therapy (OR 6.5, 95% CI 1.82-23.25, p=0.018) and history of atrial fibrillation (OR 4.4, 95% CI 1.9-10.6, p<0.001). Analysis of the 42 cases with DSA revealed that hyperperfusion was most common in patients with poor collateral grade followed by more complete TICI reperfusion scores. Overall, HT affected 57/198 (28.8%), including 35/198 (17.7%) HI1, 11/198 (5.6%) HI2, 8/198 (4.1%) PH1 and 3/198 (1.5%) PH2. Multivariate analyses revealed that hyperperfusion at any timepoint was a potent predictor of HT (OR 52.6, 95%CI 12.4-222.6, p<0.001). Conclusions: Hyperperfusion in acute ischemic stroke is frequently demonstrated by ASL MRI, providing novel insight on the dynamics of reperfusion and HT. Hyperperfusion increases the risk of HT 50-fold, likely due to autoregulatory loss. Poor collaterals and sudden reperfusion in vulnerable cases such as those with atrial fibrillation may herald hyperperfusion and HT.

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