Abstract WP28: Factors Associated With Imaging and Endovascular Therapy Decisions for Mild Ischemic Stroke: An International Survey

Background: Approximately 1 in 7 patients with mild ischemic stroke (NIHSS ≤5) have large vessel occlusion (LVO). These patients were excluded from randomized trials of endovascular therapies (EVT). We conducted a survey to evaluate global practice patterns of EVT in mild stroke with LVO. Methods: International vascular stroke clinicians and interventionalists were invited to participate through professional stroke listservs. The survey consisted of 6 clinical vignettes of mild stroke patients with LVO (Table). Cases varied by NIHSS, neurological symptoms and LVO site. All had same risk factors, time from symptom onset (5h) and unremarkable head CT (high ASPECTS). Advanced imaging data was available upon request. We explored independent case and responder specific factors associated with advanced imaging request and EVT decision. Results: Of 492 responders, 482 had analyzable data ([median age 44 (IQR 11.25)], 78% male, 77% attending, 22% interventionalist). Participants were from USA (45%), Europe (32%), Australia (12%), Canada (6%), and Latin America (5%). EVT was offered to 48% (84% M1, 29% M2 and 19% A2). Treatment decision made without advanced imaging in 66%. In multivariable analysis, proximal occlusion (M1 vs M2 or A2, p<0.001), higher NIHSS (p<0.001) and fellow level training (vs attending; p=0.001) were positive predictors of EVT. Distal occlusion (M2 and A2) and higher age of responder were independently associated with increased advanced imaging requests. Compared to US and Australian responders, Canadians were less likely to offer EVT, while those in Europe and Latin America were more likely (p<0.05). Conclusions: Treatment patterns of EVT in mild stroke vary widely. More proximal occlusion, higher NIHSS, younger physician, fellow level training, and area of residence (Europe and Latin America) were key factors associated with offering EVT. These data suggest that wide equipoise exists in the current approach to this important subset of LVO stroke.

Download Full-text

Factors associated with prominent vessel sign on susceptibility-weighted imaging in acute ischemic stroke

Scientific Reports ◽

10.1038/s41598-021-84269-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Hai-fei Jiang ◽

Yi-qun Zhang ◽

Jiang-xia Pang ◽

Pei-ning Shao ◽

Han-cheng Qiu ◽

...

Keyword(s):

Ischemic Stroke ◽

Large Vessel ◽

Susceptibility Weighted Imaging ◽

Regression Analyses ◽

Large Vessel Occlusion ◽

Stroke Patients ◽

Anterior Circulation ◽

Vessel Occlusion ◽

Factors Associated ◽

Univariate Analyses

AbstractThe prominent vessel sign (PVS) on susceptibility-weighted imaging (SWI) is not displayed in all cases of acute ischemia. We aimed to investigate the factors associated with the presence of PVS in stroke patients. Consecutive ischemic stroke patients admitted within 24 h from symptom onset underwent emergency multimodal MRI at admission. Associated factors for the presence of PVS were analyzed using univariate analyses and multivariable logistic regression analyses. A total of 218 patients were enrolled. The occurrence rate of PVS was 55.5%. Univariate analyses showed significant differences between PVS-positive group and PVS-negative group in age, history of coronary heart disease, baseline NIHSS scores, total cholesterol, hemoglobin, anterior circulation infarct, large vessel occlusion, and cardioembolism. Multivariable logistic regression analyses revealed that the independent factors associated with PVS were anterior circulation infarct (odds ratio [OR] 13.7; 95% confidence interval [CI] 3.5–53.3), large vessel occlusion (OR 123.3; 95% CI 33.7–451.5), and cardioembolism (OR 5.6; 95% CI 2.1–15.3). Anterior circulation infarct, large vessel occlusion, and cardioembolism are independently associated with the presence of PVS on SWI.

Download Full-text

Assessment and provision of rehabilitation among patients hospitalized with acute ischemic stroke in China: Findings from the China National Stroke Registry II

International Journal of Stroke ◽

10.1177/1747493017701945 ◽

2017 ◽

Vol 12 (3) ◽

pp. 254-263 ◽

Cited By ~ 8

Author(s):

Janet Prvu Bettger ◽

Zixiao Li ◽

Ying Xian ◽

Liping Liu ◽

Xingquan Zhao ◽

...

Keyword(s):

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Multivariable Analysis ◽

Thrombosis Prophylaxis ◽

Stroke Patients ◽

Multivariable Logistic Regression Model ◽

Recommended Care ◽

Stroke Registry ◽

Factors Associated ◽

Rehabilitation Assessment

Background Stroke rehabilitation improves functional recovery among stroke patients. However, little is known about clinical practice in China regarding the assessment and provision of rehabilitation among patients with acute ischemic stroke. Aims We examined the frequency and determinants of an assessment for rehabilitation among acute ischemic stroke patients from the China National Stroke Registry II. Methods Data for 19,294 acute ischemic stroke patients admitted to 219 hospitals from June 2012 to January 2013 were analyzed. The multivariable logistic regression model with the generalized estimating equation method accounting for in-hospital clustering was used to identify patient and hospital factors associated with having a rehabilitation assessment during the acute hospitalization. Results Among 19,294 acute ischemic stroke patients, 11,451 (59.4%) were assessed for rehabilitation. Rates of rehabilitation assessment varied among 219 hospitals (IQR 41.4% vs 81.5%). In the multivariable analysis, factors associated with increased likelihood of a rehabilitation assessment ( p < 0.05) included disability prior to stroke, higher NIHSS on admission, receipt of a dysphagia screen, deep venous thrombosis prophylaxis, carotid vessel imaging, longer length of stay, and treatment at a hospital with a higher number of hospital beds (per 100 units). In contrast, patients with a history of atrial fibrillation and hospitals with higher number of annual stroke discharges (per 100 patients) were less likely to receive rehabilitation assessment during the acute stroke hospitalization. Conclusions Rehabilitation assessment among acute ischemic stroke patients was suboptimal in China. Rates varied considerably among hospitals and support the need to improve adherence to recommended care for stroke survivors.

Download Full-text

Predictors of parenchymal hemorrhage after endovascular treatment in acute ischemic stroke: data from ANGEL-ACT Registry

Journal of NeuroInterventional Surgery ◽

10.1136/neurintsurg-2021-018292 ◽

2022 ◽

pp. neurintsurg-2021-018292

Author(s):

Dapeng Sun ◽

Baixue Jia ◽

Xu Tong ◽

Peter Kan ◽

Xiaochuan Huo ◽

...

Keyword(s):

Ischemic Stroke ◽

Endovascular Treatment ◽

Acute Ischemic Stroke ◽

Functional Outcome ◽

Multivariable Analysis ◽

Serum Glucose ◽

Chinese Patients ◽

Anterior Circulation ◽

Vessel Occlusion ◽

Atherosclerotic Stenosis

BackgroundParenchymal hemorrhage (PH) is a troublesome complication after endovascular treatment (EVT).ObjectiveTo investigate the incidence, independent predictors, and clinical impact of PH after EVT in patients with acute ischemic stroke (AIS) due to anterior circulation large vessel occlusion (LVO).MethodsSubjects were selected from the ANGEL-ACT Registry. PH was diagnosed according to the European Collaborative Acute Stroke Study classification. Logistic regression analyses were performed to determine the independent predictors of PH, as well as the association between PH and 90-day functional outcome assessed by modified Rankin Scale (mRS) score.ResultsOf the 1227 enrolled patients, 147 (12.0%) were diagnosed with PH within 12–36 hours after EVT. On multivariable analysis, low admission Alberta Stroke Program Early CT score (ASPECTS)(adjusted OR (aOR)=1.13, 95% CI 1.02 to 1.26, p=0.020), serum glucose >7 mmol/L (aOR=1.82, 95% CI 1.16 to 2.84, p=0.009), and neutrophil-to-lymphocyte ratio (NLR; aOR=1.05, 95% CI 1.02 to 1.09, p=0.005) were associated with a high risk of PH, while underlying intracranial atherosclerotic stenosis (ICAS; aOR=0.42, 95% CI 0.22 to 0.81, p=0.009) and intracranial angioplasty/stenting (aOR=0.37, 95% CI 0.15 to 0.93, p=0.035) were associated with a low risk of PH. Furthermore, patients with PH were associated with a shift towards to worse functional outcome (mRS score 4 vs 3, adjusted common OR (acOR)=2.27, 95% CI 1.53 to 3.38, p<0.001).ConclusionsIn Chinese patients with AIS caused by anterior circulation LVO, the risk of PH was positively associated with low admission ASPECTS, serum glucose >7 mmol/L, and NLR, but negatively related to underlying ICAS and intracranial angioplasty/stenting.Trial registration numberNCT03370939.

Download Full-text

Abstract TP37: Negative Diffusion-Weighted Imaging in Mild Ischemic Stroke Patients: An Exploratory Analysis of a Single-Center Six-Year Cohort

Stroke ◽

10.1161/str.48.suppl_1.tp37 ◽

2017 ◽

Vol 48 (suppl_1) ◽

Author(s):

Marie Louise Schmitz ◽

Grethe Andersen ◽

Irene Mikkelsen ◽

Mette H Madsen ◽

Achala Vagal ◽

...

Keyword(s):

Ischemic Stroke ◽

University Hospital ◽

Stroke Work ◽

Imaging Data ◽

Single Center ◽

Stroke Patients ◽

True Rate ◽

Complete Reversal ◽

Mild Stroke ◽

Mri Characteristics

Background: DWI-negativity was observed in nearly one third of patients with non-disabling ischemic stroke in a recent study and complete reversal of DWI-positivity was reported in 2% of mild-moderate strokes after IV rtPA treatment. We sought to identify acute DWI-negativity and DWI reversal rates in an independent cohort treated with IV rtPA because of mild stroke symptoms (defined as NIHSS 0-5). Methods: We reviewed a prospective single-center registry of consecutive, IV rtPA-treated patients at Aarhus University Hospital from 2004 to 2010 with a substantial number of strokes with low (0-5) NIHSS scores and reviewed their acute (<4.5 hours) and 24-hour MRI characteristics. Acute MRI is standard stroke work-up imaging at our center (except for patients with MRI contraindications). The local practice was to prefer IV rtPA treatment in mild stroke patients if clinical suspicion was supported by either MRI DWI positivity or other imaging data (MRI-perfusion lesions or visualized arterial occlusions on MRA). Only patients with final diagnoses of ischemic stroke upon hospital discharge were included in this analysis. Results: Among 694 patients treated with IV rtPA from 2004-2010, 266 (38.3%) had NIHSS 0-5. Among these mild stroke patients, 238 received acute MRI and 107 had 24-hour follow-up MRI. Acute DWI-negativity was observed in 32/238 (13.5%; 95% CI 9.4-18.4) patients prior to IV rtPA treatment. Among the cohort with both acute and 24-hour MRIs, acute DWI-negativity was present in 15/107 (14.0%) patients and persisted in 8/15 (53.3%; 95% CI 26.6-78.7). Of 92 DWI-positive patients, only 2/92 (2.1%) became DWI-negative at 24 hours. An association of acute DWI-negativity with younger age (OR 0.98; 95% CI 0.96-1.01) or lower NIHSS (OR 0.90; 95% CI 0.69-1.18) was not found in this cohort. Conclusions: Acute DWI-negativity was observed in ~14% of ischemic strokes with NIHSS 0-5, and half remained negative at 24 hours following IV rtPA. DWI reversal from positive to negative, possibly representing an averted infarction, occurred in 2% of patients. These rates may be lower than the true rate of DWI-negativity and reversal in mild stroke, given limitations of this analysis, including DWI-positivity influencing the initial IV rtPA decision.

Download Full-text

Abstract 101: Predictors of Early Neurological Deterioration in Minor Strokes With Large Vessel Occlusion Treated With Intravenous Thrombolysis. A French Multicentric Observational Study (MINOR-STROKE)

Stroke ◽

10.1161/str.51.suppl_1.101 ◽

2020 ◽

Vol 51 (Suppl_1) ◽

Author(s):

Pierre Seners ◽

Claire Perrin ◽

Guillaume Turc

Keyword(s):

Basilar Artery ◽

Multivariable Analysis ◽

Intravenous Thrombolysis ◽

Neurological Deterioration ◽

Large Vessel ◽

Minor Stroke ◽

Large Vessel Occlusion ◽

Vessel Occlusion ◽

Early Neurological Deterioration ◽

Proximal Occlusion

Introduction: Whether thrombectomy added on intravenous thrombolysis (IVT), as compared to IVT alone, is beneficial in minor strokes with large vessel occlusion (LVO) is unknown. To identify predictors of early neurological deterioration (END) following IVT alone may help to select the best candidates for additional thrombectomy. Methods: MINOR-STROKE was a multicentric retrospective registry collecting data of IVT-treated minor strokes (NIHSS≤5) with LVO (internal carotid artery [ICA], M1, M2 or basilar artery; with central reading) treated with or without additional thrombectomy in 45 French stroke units. The patients initially intended for IVT alone, including those who eventually received thrombectomy due to END, were included in the present analysis. END was defined as a ≥4 points on NIHSS within 24hrs following admission. Thrombus length was measured centrally either on T2*-MRI, CT (hyperdense middle cerebral artery) or CT-angiography. Results: Overall, 799 patients were included: mean age 69 years, median NIHSS 3, occlusion located in ICA±M1/M2, proximal M1, distal M1, M2, or basilar artery in 20%, 7%, 19%, 50% and 4% of patients, respectively. Thrombus was visible in 78% of patients (median length 9mm, IQR 6-12mm). END occurred in 15% of patients and was associated with poor 3-month functional outcome (mRS>2: 55% vs. 12% of patients with and without END, respectively). Only 15% of ENDs were due to intracranial haemorrhage. In multivariable analysis, a more proximal occlusion site (M2 [reference], distal M1: OR 2.1 [IC95% 1.1-4.1], proximal M1: OR 3.8 [1.6-9.1], ICA±M1/M2: OR 5.0 [2.6-9.6], basilar artery: OR 4.9 [1.1-4.1]; P <0.001) and a longer thrombus (<6mm [reference], [6-9mm[: OR 1.3 [IC95% 0.6-2.9], [9-12mm[: OR 1.8 [0.8-3.9] and ≥12mm: OR 2.7 [1.3-5.6]; P =0.036) were independently associated with END. END occurred in 33%, 19%, 14%, 7% and 27% of patients with ICA±M1/M2, M1 proximal, M1 distal, M2 and basilar artery, respectively, and in 8%, 10%, 14% et 23% of patients with thrombus length of <6, [6-9[, [9-12[ and ≥12mm, respectively. Conclusion: Our study suggests that thrombus location and length are strong predictors of END in minor strokes with LVO. This may help to select the best candidates for additional endovascular therapy.

Download Full-text

Abstract 3183: Prognosis of Mild Ischemic Stroke with Large Vessel Occlusion

Stroke ◽

10.1161/str.43.suppl_1.a3183 ◽

2012 ◽

Vol 43 (suppl_1) ◽

Author(s):

Esteban Cheng-Ching ◽

Russell Cerejo ◽

Ken Uchino ◽

Muhammad S Hussain ◽

Gabor Toth

Keyword(s):

Ischemic Stroke ◽

Endovascular Therapy ◽

Time Window ◽

Optimal Treatment ◽

Large Vessel ◽

Stroke Severity ◽

Large Vessel Occlusion ◽

Vessel Occlusion ◽

Nihss Score ◽

Mild Stroke

Background and purpose Large vessel occlusion (LVO) in acute ischemic stroke has been reported to be an independent predictor of unfavorable clinical outcome. However, the prognosis and optimal treatment of patients with only mild neurologic deficits due to LVO are not known. Methods We performed a retrospective chart review from a database of stroke patients admitted to our large academic medical center between July 1, 2010 and June 30 , 2011. Inclusion criteria were acute stroke or TIA, presentation within 9 hours from symptom onset, large vessel occlusion as a culprit of ischemic symptoms, and mild stroke severity with initial NIH Stroke Scale (NIHSS) score <8. Results We identified 59 patients with mild ischemic stroke or TIA, who were evaluated within 9 hours from onset. Of these, 13 (22%) had culprit large vessel occlusions. Five were female, 1 had diabetes, 12 had hypertension, 7 had hyperlipidemia, 2 had atrial fibrillation and 7 were smokers. The median NIHSS score was 5. The location of arterial occlusions were 5 in M1 segment of the middle cerebral artery (MCA), 6 in M2 segment of MCA, 1 each in posterior cerebral and vertebral arteries. Two patients received acute therapy, 1 with intravenous thrombolysis and 1 with endovascular therapy. Reasons for withholding thrombolytic therapy were time window in 8, mild stroke severity in 2, and atypical presentations in 2. Reasons for withholding acute endovascular therapy were mild stroke severity in 7, imaging finding in 2, technical considerations in 2, and lack of consent in 1. From hospital admission to discharge, 10 (77%) patients had symptom improvement, 2 had worsening, and one was unchanged. At 30 days, 5 (38%) had good outcome with a modified Rankin Scale (mRS) of 0-1. Three (23%) had mRS of 2, one (8%) patient had mRS of 3. Outcomes for 4 patients were unknown. Conclusions A significant proportion of patients presenting with mild ischemic symptoms has large vessel occlusion. Acute treatment in this population is frequently withheld due to mild severity or thrombolytic time window. Despite mild symptoms at presentation, some patients are left with moderate disability. Optimal treatment options for this population should be further evaluated in a larger group of patients.

Download Full-text

Abstract T P26: Combining Clinical and Imaging Data to Develop a Highly Predictive Model of Outcomes in the MR RESCUE Trial

Stroke ◽

10.1161/str.46.suppl_1.tp26 ◽

2015 ◽

Vol 46 (suppl_1) ◽

Author(s):

Chelsea S Kidwell ◽

Reza Jahan ◽

Jeffrey Gornbein ◽

Jeffry R Alger ◽

Val Nenov ◽

...

Keyword(s):

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Infarct Volume ◽

Patient Characteristics ◽

Hemorrhagic Transformation ◽

Imaging Data ◽

Vascular Events ◽

Vessel Occlusion ◽

Intermediate Variables ◽

Core Volume

Background: Identifying patient characteristics that predict outcomes in acute ischemic stroke may assist in triaging those who are candidates for endovascular therapies. We sought to identify predictors of outcome in the overall Mechanical Retrieval and Recanalization of Stroke Clots Using Embolectomy (MR RESCUE) cohort and compare results to the previously validated Totaled Health Risks in Vascular Events (THRIVE) score. Methods: MR RESCUE randomized 118 acute ischemic stroke patients with multimodal imaging to embolectomy or standard care within 8 hours of onset. For this analysis, we investigated 17 baseline variables (e.g. age, predicted core volume, time to enrollment) and 8 intermediate variables (e.g. hemorrhagic transformation, day 7 recanalization, final infarct volume) with the potential to impact outcomes (day 90 mRS). The baseline variables were analyzed employing bivariate and multivariate methods (random forest and logistic regression). Two models were developed, one including only significant baseline variables, and the second also incorporating significant intermediate variables. Results: A multivariate model (Table) employing only baseline covariates achieved an overall accuracy (C statistic) of 85% in predicting poor outcome (day 90 mRS 3-6) compared to 80.5% for the THRIVE score. A second model (Table) adding significant intermediate variables achieved 89% accuracy in predicting day 90 mRS. Conclusions: In the MR RESCUE trial, advanced imaging variables, including predicted core volume and site of vessel occlusion, contributed to a highly accurate multivariable model of outcome. In the development phase, this model achieved higher accuracy than the THRIVE score. Future studies are needed to validate this model in an independent cohort.

Download Full-text

Endovascular treatment of acute ischemic stroke in nonagenarians compared with younger patients in a multicenter cohort

Journal of NeuroInterventional Surgery ◽

10.1136/neurintsurg-2016-012427 ◽

2016 ◽

Vol 9 (8) ◽

pp. 727-731 ◽

Cited By ~ 14

Author(s):

Muhib A Khan ◽

Grayson L Baird ◽

David Miller ◽

Anand Patel ◽

Shawn Tsekhan ◽

...

Keyword(s):

Multivariable Analysis ◽

National Institutes Of Health ◽

Small Subset ◽

Imaging Data ◽

Vessel Occlusion ◽

Younger Patients ◽

Age Cohort ◽

Multivariable Regression ◽

Predicting Outcome ◽

The Relationship

BackgroundRecent studies have demonstrated the superiority of endovascular therapy (EVT) for emergent large vessel occlusion.ObjectiveTo determine the effectiveness of EVT in nonagenarians, for whom data are limited.MethodsWe retrospectively reviewed clinical and imaging data of all patients who underwent EVT at two stroke centers between January 2012 and August 2014. The 90-day functional outcome (modified Rankin Scale (mRS) score) was compared between younger patients (age 18–89 years; n=175) and nonagenarians (n=18). The relationship between pre-stroke and 90-day post-stroke mRS was analyzed in these two groups. Multivariable analysis of age, recanalization grade, and admission National Institutes of Health Stroke Scale (NIHSS) for predicting outcome was performed.ResultsAge ≥90 years was associated with a poor (mRS >2) 90-day outcome relative to those under 90 (89% vs 52%, OR=8, 95% CI 1.7 to 35.0; p=0.0081). Nonagenarians had a higher pre-stroke mRS score (0.77; 95% CI 0.44 to 1.30) than younger patients (0.24; 95% CI 0.17 to 0.35; p=0.005). No difference was observed between nonagenarians and younger patients in the rate of mRS change from pre-stroke to 90 days (p=0.540). On multivariable regression, age (OR=1.05, 95% CI 1.03 to 1.08; p<0.0001), recanalization grade (OR=0.62 95% CI 0.42 to 0.91; p=0.015), and admission NIHSS (OR=1.07 95% CI 1.02 to 1.13; p=0.01) were associated with a poor 90-day outcome.ConclusionsNonagenarians are at a substantially higher risk of a poor 90-day outcome after EVT than younger patients. However, a small subset of nonagenarians may benefit from EVT, particularly if they have a good pre-stroke functional status. Further research is needed to identify factors associated with favorable outcome in this age cohort.

Download Full-text

Five‐Year Risk of Acute Myocardial Infarction After Acute Ischemic Stroke in Korea

Journal of the American Heart Association ◽

10.1161/jaha.120.018807 ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Keon‐Joo Lee ◽

Seong‐Eun Kim ◽

Jun Yup Kim ◽

Jihoon Kang ◽

Beom Joon Kim ◽

...

Keyword(s):

Myocardial Infarction ◽

Acute Myocardial Infarction ◽

Ischemic Stroke ◽

Acute Ischemic Stroke ◽

Cumulative Incidence ◽

Multivariable Analysis ◽

First Year ◽

Vessel Occlusion ◽

History Of ◽

Annual Risk

Background The long‐term incidence of acute myocardial infarction (AMI) in patients with acute ischemic stroke (AIS) has not been well defined in large cohort studies of various race‐ethnic groups. Methods and Results A prospective cohort of patients with AIS who were registered in a multicenter nationwide stroke registry (CRCS‐K [Clinical Research Collaboration for Stroke in Korea] registry) was followed up for the occurrence of AMI through a linkage with the National Health Insurance Service claims database. The 5‐year cumulative incidence and annual risk were estimated according to predefined demographic subgroups, stroke subtypes, a history of coronary heart disease (CHD), and known risk factors of CHD. A total of 11 720 patients with AIS were studied. The 5‐year cumulative incidence of AMI was 2.0%. The annual risk was highest in the first year after the index event (1.1%), followed by a much lower annual risk in the second to fifth years (between 0.16% and 0.27%). Among subgroups, annual risk in the first year was highest in those with a history of CHD (4.1%) compared with those without a history of CHD (0.8%). The small‐vessel occlusion subtype had a much lower incidence (0.8%) compared with large‐vessel occlusion (2.2%) or cardioembolism (2.4%) subtypes. In the multivariable analysis, history of CHD (hazard ratio, 2.84; 95% CI, 2.01–3.93) was the strongest independent predictor of AMI after AIS. Conclusions The incidence of AMI after AIS in South Korea was relatively low and unexpectedly highest during the first year after stroke. CHD was the most substantial risk factor for AMI after stroke and conferred an approximate 5‐fold greater risk.

Download Full-text

Abstract P641: Risk and Predictors of New Cancer Diagnoses After Acute Ischemic Stroke

Stroke ◽

10.1161/str.52.suppl_1.p641 ◽

2021 ◽

Vol 52 (Suppl_1) ◽

Author(s):

Stephanie Buchman Rutrick ◽

Meenakshi Bassi ◽

Yahya B Atalay ◽

Marialaura Simonetto ◽

Bhavan Shah ◽

...

Keyword(s):

Weight Loss ◽

Ischemic Stroke ◽

Multivariable Analysis ◽

Clinical Factors ◽

Factors Associated ◽

Unexplained Weight Loss ◽

C Statistic ◽

Incident Cancer ◽

History Of ◽

History Of Cancer

Introduction: Acute ischemic stroke (AIS) may be the first sign of occult cancer. We aimed to better define the incidence of cancer in the year after AIS and to identify clinical factors associated with new cancer diagnoses. Methods: This was a retrospective cohort study using data from the Cornell Acute Stroke Academic Registry (CAESAR) on patients hospitalized at our center with AIS from 2011-2015. Patients with history of cancer were excluded. Through automated electronic data capture and manual abstraction of inpatient and outpatient medical records, we collected data on patients’ demographics, comorbidities, presentation, radiographic characteristics, stroke subtype, and clinical outcomes. Patients were followed for 1 year after the index AIS for a new diagnosis of pathologically-confirmed cancer. Cox hazards regression adjusting for the competing risk of death was used to evaluate associations between clinical factors and incident cancer. Factors significantly associated in multivariable analysis were entered into a risk stratification score, and this score’s discriminatory ability was evaluated by Harrell’s C-statistic. Results: After excluding 253 patients with history of cancer, this analysis included 963 patients with AIS. During a mean follow-up of 222 days, 16 patients (1.7%; 95% CI, 1.0-2.7%) were diagnosed with cancer. The most common cancers were lung (n=7) and leukemia (n=4) and the median time to cancer diagnosis was 13 days (IQR, 7-194 days). Among patients with cryptogenic stroke, the 1-year cancer incidence rate was 1.7% (95% CI, 0.6-3.7%). Clinical factors associated with incident cancer in multivariable analysis were venous thromboembolism during the AIS hospitalization (HR, 12.5; 95% CI, 3.3-47.0), unexplained weight loss within 6 months (HR 11.7; 95% CI, 3.3-42.0), and three-territory acute infarcts (HR, 4.1, 95% CI, 1.3-13.4). These factors were used to create a clinical score that had a C-statistic of 0.7 (95% CI, 0.5-0.8). Conclusions: In a large urban cohort of AIS, the estimated 1-year incidence of first-ever cancer was 1.7%. Unexplained weight loss, concomitant venous thromboembolism, and three-territory acute infarction pattern may serve as clues to occult cancer with AIS.

Download Full-text