scholarly journals E.09 Predictors of optimal endovascular therapy results among patients with acute ischemic stroke

2016 ◽  
Vol 43 (S2) ◽  
pp. S18-S18
Author(s):  
D Catana ◽  
J Badhiwala ◽  
A Koziarz ◽  
K Reddy ◽  
SA Almenawer
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Endovascular Therapy ◽  
Mechanical Thrombectomy ◽  
Combined Therapy ◽  
Arterial Occlusion ◽  
Functional Independence ◽  
Sensitivity Analyses ◽  
Care Group ◽  
Functional Benefit

Background: Several studies have demonstrated the safety and efficacy of endovascular therapy for patients with acute ischemic stroke. However, patient, imaging and treatment factors associated with the optimal functional outcome require better definition. Methods: We pooled data from 8 randomized controlled trials (SYNTHESIS, MR RESCUE, IMS III, MR CLEAN, ESCAPE, EXTEND-IA, SWIFT-PRIME, and REVASCAT). We conducted subgroup and sensitivity analyses to evaluate predictors of optimal functional results (modified Rankin scale, mRS) at 90 days. Results: Meta-analysis of 8 trials including 2,423 patients yielded that endovascular therapy resulted in 44.6% functional independence (mRS 0-2) versus 31.8% in the usual care group (OR 1.71, 95% CI 1.18-2.49, P=0.005). This treatment effect was significantly greater among patients with confirmed angiographic imaging of proximal arterial occlusion (OR 2.24, 95% CI 1.72-2.90, P<0.001), in patients who received the combined therapy of intravenous tPA and endovascular intervention (OR 2.07, 95% CI 1.46-2.92, P<0.001), and when using stent retriever for mechanical thrombectomy (OR 2.39, 95% CI 1.88-3.04, P<0.001). Conclusions: The relative functional benefit associated with endovascular therapy among patients with acute ischemic stroke was increased when combined with intravenous tPA, with confirmed proximal arterial occlusion on angiographic imaging, and with use of stent retrievers for mechanical thrombectomy.

Abstract 3314: The Role of Bridging with Intravenous Thrombolysis in Endovascular Therapy of Acute Ischemic Stroke.

Stroke ◽  
2012 ◽  
Vol 43 (suppl_1) ◽  
Author(s):  
Omar Kass-Hout ◽  
Tareq Kass-Hout ◽  
Maxim Mokin ◽  
David Orion ◽  
Shadi Jahshan ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Endovascular Treatment ◽  
Acute Ischemic Stroke ◽  
Endovascular Therapy ◽  
Combined Therapy ◽  
Large Vessel ◽  
P Value ◽  
Large Vessel Occlusion ◽  
Vessel Occlusion ◽  
Nihss Score

Background: Large vessel occlusions with a high clot burden are less likely to improve with the FDA-approved IV strategy. Endovascular therapy within the first 3 h of stroke symptom onset provides an effective alternative treatment in patients with large vessel occlusion. It is not clear if combination of IV thrombolysis and endovascular approach is superior to endovascular treatment alone. Methods: We retrospectively reviewed all cases of acute ischemic stroke with large vessel occlusion treated within the first 3 h stroke onset during the 2005-2010 period. First group received endovascular therapy within the first 3 h of stroke onset. Second group consisted of patients who received IV thrombolysis within the first 3 h followed by endovascular therapy. We compared the following outcomes: revascularization rates, NIHSS score at discharge, mRS at discharge and 3months, symptomatic hemorrhage rates and mortality. Results: Among 104 patients identified, 42 received combined therapy, and 62 received endovascular therapy only. The two groups had similar demographic (age and sex distribution) and vascular risk factors distribution, as well as NIHSS score on admission (14.8±4.7 and 16.0±5.3; p=0.23). We found no difference in TIMI recanalization rates (Thrombolysis in Myocardial Infarction scale score of 2 or 3) following combined or endovascular therapy alone (83.3% and 79.0%; p=0.59). A preferred outcome, defined as a mRS of 2 or less at 90 days also did not differ between the combined therapy group and the endovascular only group (37.5% and 34.5%; p=0.76). There was no difference in mortality rate (22.5% and 31.0%; p=0.36) and the rate of symptomatic intracranial hemorrhage (9.5% and 8.1%; p=0.73). There was a significant difference in mean time from symptom onset to endovascular treatment between the combined group (227±88 min) and endovascular only group (125±40 min; p<0.0001).Patients with good TIMI recanalization rate of 2 or 3 showed a trend of having a better mRS at 90 days in both bridging (16.67% vs. 41.18%, p-value: 0.3813) and endovascular groups (25% vs. 34.78%, p-value: 0.7326).When analyzing the correlation of mRS at 90 days with the site of occlusion, patients in the bridging group showed a trend of a better outcome when the site of occlusion was ICA (33.3% vs 30%) and MCA (66.67% vs. 27.59%) and worse outcome when the site of occlusion was in the posterior circulation (26.32% vs. 50%), however, these results were not statistically significant (p-values: 0.1735& 0.5366). Conclusion: Combining IV thrombolysis and endovascular therapy achieves similar rates of clinical outcomes, revascularization rates, complications and mortality rates, when compared with endovascular treatment alone. The combined therapy, however, significantly delays initiation of endovascular treatment. A randomized prospective trial comparing both treatment strategies in acute ischemic stroke is warranted

Abstract TMP89: Collaterals and Reperfusion Mediate Blood Pressure Changes in Acute Ischemic Stroke

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
David S Liebeskind ◽  
Graham W Woolf ◽  
Nerses Sanossian ◽  
Jason D Hinman ◽  
Radoslav Raychev ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Endovascular Therapy ◽  
Arterial Occlusion ◽  
Patient Specific ◽  
Pressure Data ◽  
Blood Pressure Data ◽  
Pressure Changes ◽  
Continuous Blood Pressure

Background: The pathophysiology and optimal management of blood pressure changes in acute ischemic stroke remain unknown. Blood pressure guidelines do not consider patient-specific or serial data on dynamic blood pressure readings. We investigated continuous blood pressure data during endovascular therapy for acute stroke to discern changes associated with collaterals, recanalization and reperfusion. Methods: Continuous monitoring blood pressure data was collected in consecutive cases of endovascular therapy for acute ischemic stroke due to ICA or proximal MCA occlusion. Angiography details were independently analyzed to document site of arterial occlusion, baseline collateral grade, time of device deployments, time of recanalization, time of final reperfusion, final AOL recanalization and final TICI reperfusion. Statistical analyses correlated instantaneous and serial blood pressure changes with these angiographic parameters. Results: 80 patients (median age 73 years; 33 women) were studied. Arterial lesions included 37 ICA and 41 proximal M1 MCA occlusions. Collateral grade prior to intervention included 2 ASITN grade 4, 26 grade 3, 23 grade 2, 6 grade 1 and 0 grade 0. oTICI2C reperfusion scores after thrombectomy included 2 TICI 3 (100%), 22 TICI 2C (90-99%), 25 TICI o2B (67-89%), 9 TICI m2B (50-66%), 19 TICI 2A (<50%) and 3 TICI 0/1. More robust collateral grade was associated with greater reperfusion scores (r=0.32, p=0.028). The change in blood pressure (ΔBP) from earliest BP to time of recanalization was mean 59% of ΔBP during the entire procedure. Better collaterals were associated with lower BP prior to recanalization (r=-0.377, p=0.012). Lower BP prior to recanalization was linked with greater TICI reperfusion (r=-0.242, p=0.050). Higher TICI reperfusion scores were also associated with a greater drop or ΔBP at the time of recanalization (r=0.269, p=0.031). AOL recanalization was not related to ΔBP. Conclusions: Collaterals and reperfusion, but not recanalization, mediate blood pressure changes in acute ischemic stroke. Prospective, precision medicine stroke studies should leverage patient-specific, real-time data on continuous blood pressure with imaging correlates to define BP goals of future in-hospital management.

Abstract P488: The Impact of First Pass Effect on Acute Ischemic Stroke Clinical Outcomes: Why We Need to Continue to Improve Mechanical Thrombectomy?

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Ameer E Hassan ◽  
Mahmoud Dibas ◽  
Amr Ehab El-Qushayri ◽  
Sherief Ghozy ◽  
Adam A Dmytriw ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Clinical Outcomes ◽  
Mechanical Thrombectomy ◽  
Functional Independence ◽  
Vessel Occlusion ◽  
First Pass Effect ◽  
Improved Outcomes ◽  
First Pass ◽  
The Impact

Background: Mechanical thrombectomy (MT) has significantly improved outcomes of acute ischemic stroke (AIS) patients due to large vessel occlusion (LVO). The first-pass effect (FPE), defined as achieving complete reperfusion (mTICI3/2c) with a single pass, was reported to be associated with higher functional independence rates following EVT and has been emphasized as an important procedural target. We compared MT outcomes in patients who achieved FPE to those who did not in a real world large database. Method: A retrospective analysis of LVO pts who underwent MT from a single center prospectively collected database. Patients were stratified into those who achieved FPE and non-FPE. The primary outcome (discharge and 90 day mRS 0-2) and safety (sICH, mortality and neuro-worsening) were compared between the two groups. Results: Of 580 pts, 261 (45%) achieved FPE and 319 (55%) were non-FPE. Mean age was (70 vs 71, p=0.051) and mean initial NIHSS (16 vs 17, p=0.23) and IV tPA rates (37% bs 36%, p=0.9) were similar between the two groups. Other baseline characteristics were similar. Non-FPE pts required more stenting (15% vs 25%, p=0.003), and angioplasty (19% vs 29%, p=0.01). The FPE group had significantly more instances of discharge (33% vs 17%, p<0.001), and 90-day mRS score 0-2 (29% vs 20%, p<0.001), respectively. Additionally, the FPE group had a significant lower mean discharge NIHSS score (12 vs 17, p<0.001). FPE group had better safety outcomes with lower mortality (14.2% vs 21.6%, p=0.03), sICH (5.7% vs 13.5, p=0.004), and neurological worsening (71.3% vs 78.4%, p=0.02), compared to the non-FPE group. Conclusion: Patients with first pass complete or near complete reperfusion with MT had higher functional independence rates, reduced mortality, symptomatic hemorrhage and neurological worsening. Improvement in MT devices and techniques is vital to increase first pass effect and improve clinical outcomes.

Abstract WP25: The Impact of Body Mass Index on Outcomes of Mechanical Thrombectomy for Acute Ischemic Stroke

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Stephanie Chen ◽  
David McCarthy ◽  
Vasu Saini ◽  
Marie Brunet ◽  
Eric Peterson ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Body Mass ◽  
Linear Correlation ◽  
Mechanical Thrombectomy ◽  
Functional Independence ◽  
Normal Weight ◽  
Vessel Occlusion ◽  
The Impact

Background: Obesity is an established risk factor for acute ischemic stroke (AIS), but its impact on clinical outcomes and mortality after AIS remains controversial. In this study, we evaluate the association of body mass index (BMI) on outcomes after mechanical thrombectomy (MT) for large vessel occlusion acute ischemic stroke (LVOS). Methods: We reviewed our prospective MT database for LVOS between 2015 and 2018. BMI was analyzed as a continuous and categorical variable with underweight BMI <18.5, normal BMI 18.5-24.9, overweight BMI 25-29.9, and obese BMI>30. Multivariate analysis was used to determine predictors of outcome. Results: 335 patients underwent MT with 7 (2.1%) patients classified as underweight, 107 (31.9%) normal, 141 (42.1%) overweight, and 80 (23.9%) obese. Compared to normal weight (reference), obese patients had higher rates of hypertension and hyperlipidemia, while underweight patients had higher rates of previous stroke and presentation NIHSS. The time from symptom onset to puncture, procedural techniques, and reperfusion success (>TICI 2b) was not significantly different between BMI categories. There was a significant inverse linear correlation between BMI and symptomatic hemorrhagic. In patients with successful reperfusion (>TICI 2b), there was also a significant bell-shaped relationship between BMI and functional independence (mRS < 3) with both low and high BMIs associated with worse outcomes. In patients without post-procedural symptomatic hemorrhage, there was a significant linear correlation between BMI and inpatient mortality. Conclusion: In LVOS patients treated with MT, BMI is inversely related with post-procedural symptomatic hemorrhage. Yet in those whom reperfusion is achieved, both lower and higher than normal BMI were associated with worse functional outcomes. Thus, the obesity paradox does not appear to pertain to mechanical thrombectomy, although larger prospective studies are necessary.

scholarly journals Long-Term Outcomes of Mechanical Thrombectomy for Stroke: A Meta-Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
David J. McCarthy ◽  
Anthony Diaz ◽  
Dallas L. Sheinberg ◽  
Brian Snelling ◽  
Evan M. Luther ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Endovascular Therapy ◽  
Mechanical Thrombectomy ◽  
Meta Analysis ◽  
Functional Independence ◽  
Long Term Outcomes ◽  
Long Term Follow Up ◽  
Mr Clean

Mechanical thrombectomy (MT) has become the standard treatment for large vessel occlusion (LVO) in acute ischemic stroke (AIS). Few studies have investigated long-term outcomes for AIS treated with MT. Therefore, a pooled meta-analysis using data from randomized clinical trials (RCT) was performed to assess for long-term clinical outcomes. A systematic literature search was conducted on 27 September 2017, by searching the English literature in the Cochrane Library, MEDLINE, and Embase for RCTs investigating long-term outcomes (greater than standard 3-month timepoint) of endovascular intervention versus medical management for patients with AIS. The study was carried out according to PRISMA guidelines and random effects analysis was carried out to account for heterogeneity. Three trials were included: IMS III, MR CLEAN, and REVASCAT, comprising a total of 1,362 patients. Long-term clinical outcomes were available for 1-year follow-up in IMS III and REVASCAT and at 2 years in MR CLEAN. Functional independence at long-term follow-up favored endovascular stroke intervention (OR 1.51; p = 0.02). When stratified by LVO inclusion criteria, greater endovascular functional independence benefits were observed (OR 1.85; p = 0.0005). There was a significant difference between the 2 arms in favor of endovascular therapy for the quality of life at long-term follow-up (mean difference 0.11; p = 0.0002). No difference in mortality at long-term follow-up was observed (OR 0.82; p = 0.12). We conclude that endovascular therapy results in favorable outcomes at long-term follow-up for patients with acute ischemic stroke compared to standard medical treatment alone and that the 90-day timepoint offers a fair representation of the long-term outcomes.

Multicenter clinical experience in over 125 patients with the Penumbra Separator 3D for mechanical thrombectomy in acute ischemic stroke

2014 ◽  
Vol 8 (1) ◽  
pp. 8-12 ◽  
Author(s):  
Daniel Behme ◽  
Annika Kowoll ◽  
Anastasios Mpotsaris ◽  
Claudia Hader ◽  
Lukas Hechelhammer ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Three Dimensional ◽  
Recombinant Tissue Plasminogen Activator ◽  
Functional Independence ◽  
High Rate ◽  
Arterial Lesions ◽  
Symptomatic Intracranial Hemorrhage ◽  
Mean Time

BackgroundThe aim of this study was to assess reperfusion and clinical outcome of treatment with the self-expanding retrievable Separator 3D in revascularization of acute ischemic stroke. The three-dimensional (3D) device secures thrombus with direct aspiration and supports debulking of the clot.MethodsAt two centers, 129 consecutive stroke patients with National Institutes of Health Stroke Scale (NIHSS) scores ≥5 were treated with mechanical thrombectomy using the Separator 3D as a component of the Penumbra System within 8 h of symptom onset; modified Treatment in Cerebral Infarction (mTICI) revascularization scores, NIHSS score on admission and discharge, mortality rates, and modified Rankin Scale (mRS) outcomes at 90 days were evaluated.ResultsA total of 129 vessels in 129 patients were treated. Occlusions were located in the middle cerebral artery (MCA, 48%), internal carotid artery (ICA, 33%), cervical ICA–MCA (3%), and vertebrobasilar arteries (16%). Intravenous thrombolytic therapy with recombinant tissue plasminogen activator was given to 78% of patients. Median NIHSS was 15 prior to treatment. Reperfusion to mTICI 2b or 3 was successful in 96/129 (74%) target arterial lesions, with more than half of cases (51%) achieving mTICI 3. The mean time from arterial puncture to revascularization was 65 min. At 90 days, the symptomatic intracranial hemorrhage rate was 4%, all cause mortality was 32%, and 43/99 patients (43%) achieved functional independence with an mRS score of ≤2.ConclusionsThe results suggest that the Separator 3D enables safe and effective revascularization of occluded large arteries in acute stroke intervention, leading to a high rate of functional independence at 90 days.

Abstract 2219: Trevo System: Single Center Experience With A Novel Mechanical Thrombectomy Device

Stroke ◽  
2012 ◽  
Vol 43 (suppl_1) ◽  
Author(s):  
Nuno M Mendonça ◽  
Alan Flores ◽  
Jorge Pagola ◽  
Marta Rubiera ◽  
David Rodríguez-Luna ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Functional Independence ◽  
Median Number ◽  
Single Center Experience ◽  
Procedural Complications ◽  
Thrombectomy Device ◽  
Number Of Passes

Background and Purpose: Recent reports have indicated that mechanical thrombectomy may have potential as a treatment for acute ischemic stroke. This study aims to describe the safety and effectiveness of Trevo RetrieverTM (Concentric Medical Inc, Mountain View, California) using StentrieverTM technology, in revascularization of patients with acute ischemic stroke. Methods: Prospective study evaluating the clinical, radiological and functional outcome of 13 patients with an angiographically verified occlusion of the anterior cerebral circulation. All patients underwent thrombectomy with TR as monotherapy or in combination with intra-arterial thrombolysis, within the first 8 hours from symptoms onset. Successful revascularization was defined as thrombolysis in cerebral ischemia grade 2a to 3. Good outcome was defined as modified Rankin Scale score ≤ 2. Results: Median baseline NIHSS score was 19 (16-22). The occlusion site was MCA in 8 patients and ICA in 5 patients. Five patients received IV tPA before endovascular procedure. Revascularization was achieved in 10 of 13 patients (77%). The median number of passes for maximal recanalization was 2 (1-3) and the mean time from groin puncture to recanalization was 95±31 minutes. No significant intra-procedural complications occurred. Four patients (30%) died during the 90-day follow-up period and 4 patients (30%) achieved functional independence at 3 months. Conclusions: Early clinical experience suggests that the TR can allow safe and effective revascularization in certain subjects with acute ischemic stroke.

Abstract WMP1: Cost Effectiveness Analysis of Mechanical Thrombectomy: the THRACE Randomized Trial

Stroke ◽  
2017 ◽  
Vol 48 (suppl_1) ◽  
Author(s):  
Hamza Achit ◽  
Francis guillemin ◽  
Marc Soudant ◽  
Kossar Hosseini ◽  
Aurelie Bannay ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Randomized Trial ◽  
Acute Ischemic Stroke ◽  
Mechanical Thrombectomy ◽  
Intravenous Thrombolysis ◽  
Cost Effective ◽  
Functional Independence ◽  
Quality Adjusted Life Year ◽  
Significant Difference ◽  
Quality Adjusted Life

Background and purpose: The benefit of mechanical thrombectomy added to intravenous thrombolysis in patients with acute ischemic stroke has been largely demonstrated. However, evidence on economic incentive of this strategy is still limited, especially in the context of randomized trial. The purpose of this study is to analyze whether the combination of mechanical thrombectomy with intravenous thrombolysis is more cost-effective than implementing intravenous thrombolysis alone. Patients and methods: Individual-level cost and outcome data were collected in the THRACE randomized clinical trial, including patients with acute ischaemic stroke and proximal cerebral artery occlusion. Patients were assigned to either intravenous thrombolysis (IVT; n = 208) or intravenous thrombolysis plus intra-arterial thrombectomy (IVMT; n=204). The primary outcomes were both modified Rankin scale of functional independence at 90 days (score 0-2) and the EuroQol-5D score of quality of life. This study considered the perspective of the National Health Security System in France. Results: Bridging therapy increased by 10.9% the rate of functional independence compared to IVT (53% vs 42,1%) at an increased cost of 1909 є, with no significant difference in mortality (12% vs 13%) or symptomatic intracranial haemorrhage (2% vs 2%). Cost per one averted case of disability was consequently estimated at 17,480 є. The incremental cost per quality-adjusted life year gained was 13,423 є. Sensitivity analysis showed that combined approach had 84.1% probability of being cost-effective regarding cases of averted disability and 92.2% probability regarding quality-adjusted life year outcome. The national implementation of this new strategy would result in additional cost of 12.9 million є and avoid about 737 cases of death or disability. Conclusions: Based on randomized trial, this study demonstrates that intravenous thrombolysis plus mechanical intra-arterial thrombectomy for treating acute ischemic stroke is more cost-effective than intravenous thrombolysis alone.

Abstract W P47: Recanalization After IV TPA Alone Among Acute Ischemic Stroke Patients Treated With Combined IV-Endovascular Recanalization: Impact of Arterial Occlusion Site

Stroke ◽  
2014 ◽  
Vol 45 (suppl_1) ◽  
Author(s):  
Seo Hyun Kim ◽  
David Liebeskind ◽  
Reza Jahan ◽  
Sidney Starkman ◽  
Latisha Ali ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Cerebral Artery ◽  
Endovascular Therapy ◽  
Multivariate Logistic Regression Analysis ◽  
Arterial Occlusion ◽  
High Rate ◽  
Large Artery ◽  
Diagnostic Catheter ◽  
Iv Tpa

Background: Combined IV TPA and catheter-based reperfusion is an emerging treatment strategy for acute ischemic stroke. Both patient care and clinical trial design would be enhanced by delineation of which patients rapidly respond to IV TPA alone, before endovascular therapy can be initiated. Methods: In a prospectively maintained registry of patients treated under a general policy of combined IV TPA and endovascular therapy, we analyzed subjects with MRA/CTA-confirmed anterior circulation occlusions prior to IV TPA start. Results: Among 118 patients meeting study entry criteria, age was mean 71.5 (SD 14.5), 53.0% were female, and baseline NIHSS was 14.4 (SD 7.1). Confirmed sites of occlusion prior to IV TPA were internal cerebral artery (ICA) in 22.9%, M1 segment of middle cerebral artery (MCA) in 50.0%, and M2-3 in 27.1%. Among patients undergoing catheter cerebral angiography, median time from start of IV TPA to diagnostic catheter angiogram was 75 mins (IQR 50-113). A total of 48 (40.7%) patients achieved partial or complete recanalization (AOL 2-3) of the initial target artery with IV TPA alone (partial in 22 (18.6%) and complete in 26 (22.2%)); an additional 44 (37.3%) achieved partial or complete recanalization after endovascular therapy. Recanalization rates after IV TPA alone varied by target occlusion site: ICA - 22.2%, M1 - 40.7%, and M2-3 - 56.2%. In multivariate logistic regression analysis, independent predictors of recanalization with IV TPA alone were: M2-3 clot location, OR 3.04 (95% CI 1.20-7.73, p=0.019) and TOAST etiology large-artery atherosclerosis, OR 0.14 (CI 0.04-0.50, p = 0.003). Good outcome (mRS ≤ 3) rates at 3 months were 76.6% among recanalizers with IV TPA alone and 47.5% among recanalizers after both IV TPA and catheter therapy. Conclusions: When combined IV-endovascular treatment is pursued, recanalization with IV TPA alone occurs in 4 out of 10 patients before catheter therapy is started, is more common with more distal clot location, and is associated with a high rate of excellent clinical outcomes.

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