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  • 1
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    Abstract TMP88: Blood Pressure Variability Within 24 Hours After Recanalization Worsens Functional Outcome Among Patients Who Underwent Endovascular Treatment
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Stroke Vol. 51, No. Suppl_1 ( 2020-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 51, No. Suppl_1 ( 2020-02)
    Abstract: Introduction: Systemic blood pressure (BP) should be strictly monitored and adjusted during the initial stages of stroke. Due to the impairment of cerebral autoregulation, cerebral blood flow is directly affected by systemic BP and some degree of permissive hypertension might be beneficial prior to reperfusion treatments to ensure an adequate perfusion in the ischemic tissue. However, after generalization of endovascular treatment (EVT) the rate of successful recanalization has skyrocketed and it is not well established if, once achieved, BP control should be stricter given its potential risks. We aim to explore the relation between BP and outcome among patients who underwent EVT. Methods: This is a retrospective study of a prospectively acquired unicentric database that includes patients who underwent EVT with successful recanalization measured by a mTICI ≥2b. Hourly measuring of systolic and diastolic BP was conducted during the first 24 hours post-procedure. BP variation was measured using standard deviation (SD) and range. We explored the effects of BP on functional outcome at 3 months and safety variables. Results: The study included 351 subjects with a mean age of 72.7+/-13.1 and 51.6% were men. The 3-months mRS was ≤2 in 50.4% of patients, 66 subjects (19.2%) presented hemorrhagic transformation and 67 (19.1%) were dead in the 3-months follow-up period. Both systolic BP SD (15.6+/-9.9 vs. 12.9+/-4.3; p 〈 0.01) and range (55.6+/-18.4 vs. 48.7+/-16.4; p 〈 0.01) were higher among patients with bad functional outcome (mRS 〉 2). Subjects with hemorrhagic transformation presented higher range of DBP (35.7+/-12.4 vs. 32.0+/-11.9; p=0.03) and SBP (56.8+/-17.0 vs. 51.4+/-18.1; p=0.03) and higher diastolic DBP SD (9.3+/-4.1 vs. 8.2+/-2.7; p 〈 0.01). In a logistic regression analysis DBP SD predicted ICH (OR 1.11, CI 1.02-1.22, p=0.01) and SBP range emerged as a predictor of poor functional outcome (OR 0.97, CI 0.96-0.99, p 〈 0.01). No differences were detected in regard to admission BP, maximal and minimal BP or mean arterial pressure. Conclusions: Major fluctuations in systolic and diastolic BP predict increased risk of hemorrhagic complications and poor functional outcome. Minimizing BP fluctuations may improve outcome of EVT patients after recanalization.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.51.suppl_1.TMP88
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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  • 2
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    Abstract TMP89: Thrombus Cellular Composition Predicts Unexpected Early Intracranial Reocclusion After Successful Mechanical Thrombectomy
    Ovid Technologies (Wolters Kluwer Health) ; 2024
    In:  Stroke Vol. 55, No. Suppl_1 ( 2024-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 55, No. Suppl_1 ( 2024-02)
    Abstract: Introduction: Our objective is to identify thrombus composition and related factors associated with unexpected early intracranial reoclussion ( EIR) after successful mechanical thrombectomy ( MT). Methods: Endovascular treatments of patients with acute intracranial or extracranial stenting were excluded. A total of 206 patients with successful reperfusion ( mTICI ≥ 2b) were included . Each intracranial thrombi obtained by MT were analyzed by Flow Cytometry analysis to provide proportion of main leukocyte composition: granulocytes, monocytes and lymphocyte populations. Thrombi analysis, antithrombotic treatment, etiology , reperfusion treatment features, neuroimaging and other baseline variables were analyzed to identify predictors of early reoclussion in the first 48 hours after thrombectomy . Results: EIT were observed in 5.8 %( 12/206) of successfully reperfused strokes. Patients with EIR were younger [ 67 years ( 47-80) vs. 76 years ( 66-84) ; p = 0.046] with lower basal NIHSS [ 17 ( 10-21) vs. 18 ( 11-21) ; p = 0.022] . Thrombi from patients with EIR had higher proportion of lymphocytes B [1.41 % ( 0.48-2.42) vs. 0.44 %(0.16-1.19) ;p = 0.018] in comparison to cases without reoclussion. Basilar artery occlusion ( BAO) [ 2 (15.4%) vs. 8 (4,3%) ; p 0.081 ] and active smoking [ 4( 30.8%) vs. 24 (12.4%) p =0.062] presented a positive trend with EIR cases . In the logistic regression analysis adjusted by age, previous use of intravenous fibrinolysis, number of endovascular passes , proportion of Lymphocytes B, BAO and active smoking , the independent predictor of early reoclussion was the proportion of Lymphocyte B in intracranial thrombus ( aOR 1.363 , 95% CI 1.060- 1.753). Conclusions: Rich B-Lymphocyte- Thrombus predicts unexpected early intracranial reoclusion after successful mechanical thrombectomy
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.55.suppl_1.TMP89
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2024
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  • 3
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    Abstract WMP3: Direct Transfer to Angio-suite to Reduce Door-to-puncture Time in Thrombectomy for Acute Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2017
    In:  Stroke Vol. 48, No. suppl_1 ( 2017-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. suppl_1 ( 2017-02)
    Abstract: Background: We aim to evaluate the feasibility and safety of a direct transfer to the angio-suite protocol for acute stroke patients candidates for endovascular treatment (EVT). Methods: Starting June 2016, patients with pre-hospital stroke code activation (RACE≥4) admitted within 4.5h from symptoms-onset were directly transferred on admission to angio-suite (DTA) bypassing the emergency room. After Xpert-CT in the angio-suite for parenchymal evaluation, femoral puncture and EVT were performed as usual. Patients following DTA were compared to all patients with same admission criteria treated with EVT in the previous 2 years (control group, CG). Results: Of the 16 patients that followed DTA, 1 (6%) showed an intracranial hemorrhage (ICH) on Xpert-CT and 15 underwent EVT, representing 50% of EVT admitted within 4.5h or 34% of all EVT performed in the study period. 56% of DTA patients had previous neuroimaging at a primary stroke center, 44% were primary admissions with no previous neuroimaging. Baseline characteristics including age (71 Vs 72 years; p=0.71) and admission NIHSS (18.5 Vs 18;p=0.68) were comparable. Median time from admission to groin puncture was significantly shorter in DTA patients (15 minutes IQR:13-19 Vs 65 IQR:45-10;p 〈 0.01). Rate of no treatable occlusion on initial angiogram was 13.3% in DTA Vs 2.4% in CG (p=0.17). Procedural time (36 Vs 55 minutes;p=0.034) was shorter in the DTA group, while recanalization (TICI 2b-3: 86% Vs 81%;p=0.24) and symptomatic ICH rates(6.7% Vs 6.6%;p=0.98) and 24h NIHSS (10 Vs 10.5; p=0.81) were comparable. The total time from admission to recanalization was significantly shorter when DTA was applied (median 52 Vs 123;p 〈 0.01). Conclusion: In a subgroup of acute stroke patients presenting in the early window, direct transfer and triage in the angio-suite seems feasible, safe and achieves a significant reduction in hospital workflow times.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.48.suppl_1.wmp3
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2017
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  • 4
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    Sudden Recanalization : A Game-Changing Factor in Endovascular Treatment of Large Vessel Occlusion Strokes
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Stroke Vol. 51, No. 4 ( 2020-04), p. 1313-1316
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 51, No. 4 ( 2020-04), p. 1313-1316
    Abstract: First pass (FP) recanalization has been shown to be a predictor of favorable outcome in endovascular treatment of stroke. The reasons why FP recanalization leads to better outcome as compared with multiple passes (MP) are unknown. We aim to investigate the recanalization pattern and its relationship with outcome. Methods— Six hundred nine consecutive patients underwent endovascular treatment. Recanalization was defined as modified Thrombolysis in Cerebral Infarction score 2B-3. Favorable outcome was defined as modified Rankin Scale score of 0 to 2 at 90 days. Sudden recanalization (SR) was considered when modified Thrombolysis in Cerebral Infarction score varied from 0-1 to 2B-3 in a single pass. Progressive recanalization (PR) was considered if modified Thrombolysis in Cerebral Infarction score 2A was achieved at an interim pass before achieving recanalization. Patients were also categorized as recanalizers at FP, MP, or nonrecanalizers. Results— Five hundred nine (83.9%) patients achieved recanalization. SR was achieved in 378 (62.1%) patients; 280 (46%) were FP-SR, and 98 (16.1%) were MP-SR. MP-PR was achieved in 131 (21.5%) patients. Rates of favorable outcome were similar between patients with FP-SR (57.5%) and MP-SR (57.1%; odds ratio [OR], 0.9 [CI, 0.53–1.54] ; P =0.7) but lower in MP-PR (29.8%; OR, 3.33 [CI, 1.71–5.63]; P 〈 0.01). Patients with MP-PR had better outcome than nonrecanalizer (17%; OR, 2.93 [CI, 1.42–6.15]; P 〈 0.01). In univariate analysis, both FP recanalization (OR, 1.91 [CI, 1.31–2.72]; P 〈 0.01) and SR (OR, 3.19 [CI, 2.12–4.95]; P 〈 0.01) were associated with favorable outcome. However multivariate analysis adjusting for FP recanalization showed that the only procedural predictor of favorable outcome was SR (OR, 3.12 [CI, 1.91–5.16]; P 〈 0.01). Higher number of passes were associated with worse outcome in patients with recanalization (OR, 0.75 [CI, 0.66–0.85]; P 〈 0.01) but not in those with SR (OR, 0.94 [CI, 0.59–1.61]; P =0.937). Conclusions— SR strongly predicts favorable outcome in patients undergoing endovascular treatment, even after previous unsuccessful attempts. PR may reflect clot fragmentation and embolization due to more friable composition, leading to worse outcomes. Prospective studies with independent assessment of recanalization pattern should validate these results.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.119.028787
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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  • 5
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    Computed Tomography Perfusion After Thrombectomy : An Immediate Surrogate Marker of Outcome After Recanalization in Acute Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Stroke Vol. 51, No. 6 ( 2020-06), p. 1736-1742
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 51, No. 6 ( 2020-06), p. 1736-1742
    Abstract: Despite recanalization, almost 50% of patients undergoing endovascular treatment (EVT) experience poor outcome. We aim to evaluate the value of computed tomography perfusion as immediate outcome predictor postendovascular treatment. Methods— Consecutive patients receiving endovascular treatment who achieved recanalization (modified Thrombolysis in Cerebral Ischemia [mTICI] 2a-3) underwent computed tomography perfusion within 30 minutes from recanalization (CTPpost). Hypoperfusion was defined as the Tmax 〉 6 second volume; hyperperfusion as visually increased cerebral blood flow/cerebral blood volume with reduced Tmax compared with unaffected hemisphere. Dramatic clinical recovery (DCR) was defined as 24-hour National Institutes of Health Stroke Scale score ≤2 or ≥8 points drop. Delayed recovery was defined as no-DCR with favorable outcome (modified Rankin Scale score 0–2) at 3 months. Results— We included 151 patients: median National Institutes of Health Stroke Scale score 16 (interquartile range, 10–21), median admission ASPECTS 9 (interquartile range, 8–10). Final recanalization was the following: mTICI2a 11 (7.3%), mTICI2b 46 (30.5%), and mTICI3 94 (62.3%). On CTPpost, 80 (52.9%) patients showed hypoperfusion (median Tmax 〉 6 seconds: 4 cc [0–25]) and 32 (21.2%) hyperperfusion. There was an association between final TICI and CTPpost hypoperfusion(median Tmax 〉 6: 91 [56–117], 15 [0–37.5] , and 0 [0–7] cc, for mTICI 2a, 2b, and 3, respectively, P 〈 0.01). Smaller hypoperfusion volumes on CTPpost were observed in patients with DCR (0 cc [0–13] versus non-DCR 8 cc [0–56] ; P 〈 0.01) or favorable outcome (modified Rankin Scale score 0–2: 0 cc [0–13] versus 7 [0–56] cc; P 〈 0.01). No associations were detected with hyperperfusion pattern. An hypoperfusion volume 〈 3.5 cc emerged as independent predictor of DCR (OR, 4.1 [95% CI, 2.0–8.3]; P 〈 0.01) and 3 months favorable outcome (OR, 3.5 [95% CI, 1.6–7.8]; P 〈 0.01). Conclusions— Hypoperfusion on CTPpost constitutes an immediate accurate surrogate marker of success after endovascular treatment and identifies those patients with delayed recovery and favorable outcome.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.120.029212
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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  • 6
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    Leptomeningeal Collateral Flow Modifies Endovascular Treatment Efficacy on Large-Vessel Occlusion Strokes
    Ovid Technologies (Wolters Kluwer Health) ; 2021
    In:  Stroke Vol. 52, No. 1 ( 2021-01), p. 299-303
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 52, No. 1 ( 2021-01), p. 299-303
    Abstract: We aim to evaluate if good collateral flow (CF) modifies endovascular therapy (EVT) efficacy on large-vessel stroke. To do that, we used final degree of reperfusion and number of device-passes performed, factors previously associated with better functional outcome, as main outcome measures. Methods: Single-center retrospective study including consecutive stroke patients receiving EVT for anterior circulation large-vessel stroke. CF degree was assessed on CT angiography before EVT using a previously validated 4-grade score. Final degree of reperfusion, using modified Thrombolysis in Cerebral Ischemia (mTICI), and number of device-passes performed were prospectively collected. Multivariable analysis was performed to evaluate the influence of collateral flow degree on final degree of reperfusion and number of device-passes performed. Results: Six hundred twenty-six patients were included in the study; 369 patients (59%) presented good collateral flow on CT angiography. Five hundred twenty-two patients (84%) achieved successful reperfusion (mTICI 2B-3) after EVT, 304 (48%) of them with a final mTICI 2C-3. Median number of device-passes was 2 (interquartile range, 1–3). Good CF was independently associated with better final degree of reperfusion (shift analysis for mTICI0-2A/2B/2C-3%, poor CF 19/38/43 versus good CF 15/32/53, adjusted odds ratio, 1.51 [95% CI, 1.08–2.11]). Poor CF was independently associated with higher number of device-passes performed to achieve successful reperfusion (mTICI2B-3; shift analysis for 1/2/3/4+ device-passes, adjusted odds ratio, 1.59, [95% CI, 1.09–2.31] ) and complete reperfusion (mTICI2C-3; shift analysis for 1/2/3/4+ device-passes, adjusted odds ratio, 1.70 [95% CI, 1.04–2.90]). Conclusions: Patients with good CF treated with EVT experience higher rates of successful reperfusion with lower number of device-passes. CF may facilitate thrombus retrieval and prevent distal embolization of clot fragments, improving device-passes efficacy.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.120.031338
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
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  • 7
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    Improving the Evaluation of Collateral Circulation by Multiphase Computed Tomography Angiography in Acute Stroke Patients Treated with Endovascular Reperfusion Therapies
    S. Karger AG ; 2016
    In:  Interventional Neurology Vol. 5, No. 3-4 ( 2016), p. 209-217
    Details
    In: Interventional Neurology, S. Karger AG, Vol. 5, No. 3-4 ( 2016), p. 209-217
    Abstract: Good collateral circulation (CC) is associated with favorable outcomes in acute stroke, but the best technique to evaluate collaterals is controversial. Single-phase computed tomography angiography (sCTA) is widely used but lacks temporal resolution. We aim to compare CC evaluation by sCTA and multiphase CTA (mCTA) as predictors of outcome in endovascular treated patients. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 Consecutive endovascular treated patients with M1 middle cerebral artery (MCA) or terminal intracranial carotid artery (TICA) occlusion confirmed by sCTA were included. Two more CTA acquisitions with 8- and 16-second delays were performed for mCTA. Endovascular thrombectomy was performed independently of the CC status according to a local protocol [Alberta Stroke Program Early CT score (ASPECTS) 〉 6, modified Rankin scale (mRS) score 〈 3]. CC on sCTA and mCTA were compared. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 108 patients were included. Their mean age was 69.6 ± 13 years and their median National Institutes of Health Stroke Scale (NIHSS) score was 17 (interquartile range 8). 79 (73.1%) had M1 MCA and 29 (26.9%) TICA occlusions. The mean time from symptom onset to CTA was 146.8 ± 96.5 min. On sCTA, 50.9% patients presented good CC vs. 57.5% on mCTA. Good CC status in both sCTA and mCTA had a lower 24-hour infarct volume (27.4 vs. 74.8 cm 〈 sup 〉 3 〈 /sup 〉 on sCTA, p = 0.04; 17.2 vs. 97.8 cm 〈 sup 〉 3 〈 /sup 〉 on mCTA, p 〈 0.01). However, only good CC on mCTA was associated with lower 24-hour (5 vs. 8.5, p = 0.04) and median discharge NIHSS (2 vs. 4.5, p = 0.04) scores and functional independency (mRS score 〈 3) at 3 months (76.9 vs. 23.1%, p 〈 0.01). In a logistic regression model including age, NIHSS, ASPECTS and recanalization, only age (OR 0.96, 95% CI 0.93-0.99, p = 0.02) and good CC on mCTA (OR 5, 95% CI 1.99-12.6, p 〈 0.01) were independent predictors of functional outcome at 3 months. 〈 b 〉 〈 i 〉 Conclusion: 〈 /i 〉 〈 /b 〉 CC evaluation by mCTA is a better prognostic marker than CC evaluation by sCTA for clinical and functional endpoints in acute stroke patients treated with endovascular thrombectomy.
    Type of Medium: Online Resource
    ISSN: 1664-9737 , 1664-5545
    URL: Article
    DOI: 10.1159/000448525
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2016
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  • 8
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    Spontaneous systolic blood pressure drop early after mechanical thrombectomy predicts dramatic neurological recovery in ischaemic stroke patients
    SAGE Publications ; 2020
    In:  European Stroke Journal Vol. 5, No. 4 ( 2020-12), p. 362-369
    Details
    In: European Stroke Journal, SAGE Publications, Vol. 5, No. 4 ( 2020-12), p. 362-369
    Abstract: Spontaneous blood pressure drop within the first 24 h has been reported following arterial recanalisation in ischaemic stroke patients. We aimed to assess if spontaneous blood pressure drop within the first hour after mechanical thrombectomy is a marker of early neurological recovery. Patients and methods Retrospective observational single-centre study including ischaemic stroke patients treated with mechanical thrombectomy. Blood pressure parameters from admission, mechanical thrombectomy start, mechanical thrombectomy end and hourly within 24 h after mechanical thrombectomy were reviewed. Primary outcome was early dramatic neurological recovery (8-point-reduction in NIHSS or NIHSS ≤ 2 at 24 h). Secondary outcome was functional independence at 90 days (mRankin 0–2). Results We included 458 patients in our analysis. Two-hundred (43.7%) patients achieved dramatic neurological recovery following mechanical thrombectomy. One hour after mechanical thrombectomy end, median systolic blood pressure was significantly different between outcome groups (129 vs. 138 mmHg, p = 0.005) and a higher drop in median systolic blood pressure was seen in the dramatic neurological recovery group (15 vs. 9 mmHg). Optimal cut-off for predicting dramatic neurological recovery was a systolic blood pressure drop of 10.5 mmHg (sensitivity 0.54, specificity 0.55, AUC 0.55). On multivariate analysis, spontaneous systolic blood pressure drop was associated with higher odds of achieving dramatic neurological recovery (OR for 10 mmHg blood pressure drop 1.14, 95% CI 1.01–1.29, p = 0.04). No significative association between any blood pressure parameter drop and functional independence at 90 days was found. Discussion We hypothesised that spontaneous systolic blood pressure drop is a marker of successful reperfusion and, therefore, a marker of improvement of cerebral autoregulation due to the reduced final ischaemic core. Conclusion Spontaneous systolic blood pressure drop after mechanical thrombectomy is an early predictor of dramatic neurological recovery.
    Type of Medium: Online Resource
    ISSN: 2396-9873 , 2396-9881
    URL: Article
    DOI: 10.1177/2396987320933384
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
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  • 9
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    Systematic CT perfusion acquisition in acute stroke increases vascular occlusion detection and thrombectomy rates
    BMJ ; 2022
    In:  Journal of NeuroInterventional Surgery Vol. 14, No. 12 ( 2022-12), p. 1270-1273
    Details
    In: Journal of NeuroInterventional Surgery, BMJ, Vol. 14, No. 12 ( 2022-12), p. 1270-1273
    Abstract: In patients with stroke, current guidelines recommend non-invasive vascular imaging to identify intracranial vessel occlusions (VO) that may benefit from endovascular treatment (EVT). However, VO can be missed in CT angiography (CTA) readings. We aim to evaluate the impact of consistently including CT perfusion (CTP) in admission stroke imaging protocols. Methods From April to October 2020 all patients admitted with a suspected acute ischemic stroke underwent urgent non-contrast CT, CTA and CTP and were treated accordingly. Hypoperfusion areas defined by time-to-maximum of the tissue residue function (Tmax) 〉 6 s, congruent with the clinical symptoms and a vascular territory, were considered VO (CTP-VO). In addition, two experienced neuroradiologists blinded to CTP but not to clinical symptoms retrospectively evaluated non-contrast CT and CTA to identify intracranial VO (CTA-VO). Results Of the 338 patients included in the analysis, 157 (46.5%) presented with CTP-VO (median Tmax 〉 6s: 73 (29–127) mL). CTA-VO was identified in 83 (24.5%) of the cases. Overall CTA-VO sensitivity for the detection of CTP-VO was 50.3% and specificity was 97.8%. Higher hypoperfusion volume was associated with increased CTA-VO detection (OR 1.03; 95% CI 1.02 to 1.04). EVT was performed in 103 patients (30.5%; Tmax 〉 6s: 102 (63–160) mL), representing 65.6% of all CTP-VO. Overall CTA-VO sensitivity for the detection of EVT-VO was 69.9% and specificity was 95.3%. Among patients who received EVT, the rate of false negative CTA-VO was 30.1% (Tmax 〉 6s: 69 (46–99.5) mL). Conclusion Systematically including CTP in acute stroke admission imaging protocols may increase the diagnosis of VO and rate of EVT.
    Type of Medium: Online Resource
    ISSN: 1759-8478 , 1759-8486
    URL: Article
    DOI: 10.1136/neurintsurg-2021-018241
    Language: English
    Publisher: BMJ
    Publication Date: 2022
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  • 10
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    Abstract WMP70: Etiology of Stroke Based on Early Analysis of Clot Cytometry Obtained Through First Pass Technique for Mechanical Thrombectomy
    Ovid Technologies (Wolters Kluwer Health) ; 2019
    In:  Stroke Vol. 50, No. Suppl_1 ( 2019-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. Suppl_1 ( 2019-02)
    Abstract: Introduction: Mechanical thrombectomy is the best treatment for large vessel occlusion in acute strokes, this technique can obtain clots for further analysis. Objective: To evaluate flow cytometry in thrombi obtained in the treatment of hyperacute stroke by mechanical thrombectomy, as a diagnostic tool in the etiological study of stroke Methods: Consecutively, intracranial clots were obtained in the hyperacute phase of stroke with solitaire device. Cell suspensions of thrombi were prepared that were labeled by direct immunofluorescence using conjugated monoclonal antibodies. The labeled samples were acquired in a Naviostm flow cytometer (Beckman-Coulter). The following leukocyte populations were studied: granulocytes, monocytes, total lymphocytes, T lymphocytes (CD3 +), helper T lymphocytes (CD3 +, CD4 +), suppressor-cytotoxic T lymphocytes (CD3 +, CD8 +), TNK lymphocytes (CD3 +, CD56 / 16 +) , NK lymphocytes (CD3-, CD56 / 16 +) and B lymphocytes (CD19 +). The results were expressed as percentages (%). The aetiology of stroke was categorized in secondary to: major structural heart disease, atrial fibrillation, stroke of atherosclerotic etiology (severe stenosis or complicated aortic atheromatosis ulceration) or infrequent causes. Results: 40 samples were analyzed. Clots of atherosclerotic etiology (n = 13) were associated with higher% of CD4 T lymphocytes (24.85% vs 15.83% p = 0.016), and higher% of NK (21.08% vs 17.04) % p = 0.07), also showed a tendency to a higher% LT (23.69% vs 16.46% p = 0.052). Strokes secondary to AF were associated with a higher percentage of CD8 T lymphocytes (20.24 vs 13.56 p = 0.048). Conclussion: Analysis by flow cytometry of clots obtained in the hyperacute phase of stroke showed significant differences in the different lymphocyte populations according to the etiology
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.50.suppl_1.WMP70
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2019
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