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  • 1
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    Online Resource
    Association of Time of Day With Outcomes Among Patients Triaged for a Suspected Severe Stroke in Nonurban Catalonia
    Ovid Technologies (Wolters Kluwer Health) ; 2023
    In:  Stroke Vol. 54, No. 3 ( 2023-03), p. 770-780
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 54, No. 3 ( 2023-03), p. 770-780
    Abstract: We aim to assess whether time of day modified the treatment effect in the RACECAT trial (Direct Transfer to an Endovascular Center Compared to Transfer to the Closest Stroke Center in Acute Stroke Patients With Suspected Large Vessel Occlusion Trial), a cluster-randomized trial that did not demonstrate the benefit of direct transportation to a thrombectomy-capable center versus nearest local stroke center for patients with a suspected large vessel stroke triaged in nonurban Catalonia between March 2017 and June 2020. Methods: We performed a post hoc analysis of RACECAT to evaluate if the association between initial transport routing and functional outcome differed according to trial enrollment time: daytime (8:00 am –8:59 pm ) and nighttime (9:00 pm –7:59 am ). Primary outcome was disability at 90 days, as assessed by the shift analysis on the modified Rankin Scale score, in patients with ischemic stroke. Subgroup analyses according to stroke subtype were evaluated. Results: We included 949 patients with an ischemic stroke, of whom 258 patients(27%) were enrolled during nighttime. Among patients enrolled during nighttime, direct transport to a thrombectomy-capable center was associated with lower degrees of disability at 90 days (adjusted common odds ratio [acOR] , 1.620 [95% CI, 1.020–2.551]); no significant difference between trial groups was present during daytime (acOR, 0.890 [95% CI, 0.680–1.163] ; P interaction =0.014). Influence of nighttime on the treatment effect was only evident in patients with large vessel occlusion(daytime, acOR 0.766 [95% CI, 0.548–1.072]; nighttime, acOR, 1.785 [95% CI, 1.024–3.112] ; P interaction 〈 0.01); no heterogeneity was observed for other stroke subtypes ( P interaction 〉 0.1 for all comparisons). We observed longer delays in alteplase administration, interhospital transfers, and mechanical thrombectomy initiation during nighttime in patients allocated to local stroke centers. Conclusions: Among patients evaluated during nighttime for a suspected acute severe stroke in non-urban areas of Catalonia, direct transport to a thrombectomy-capable center was associated with lower degrees of disability at 90 days. This association was only evident in patients with confirmed large vessel occlusion on vascular imaging. Time delays in alteplase administration and interhospital transfers might mediate the observed differences in clinical outcome. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT02795962.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.122.041013
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2023
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  • 2
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    Monocyte-to-Lymphocyte Ratio in Clot Analysis as a Marker of Cardioembolic Stroke Etiology
    Springer Science and Business Media LLC ; 2022
    In:  Translational Stroke Research Vol. 13, No. 6 ( 2022-12), p. 949-958
    Details
    In: Translational Stroke Research, Springer Science and Business Media LLC, Vol. 13, No. 6 ( 2022-12), p. 949-958
    Type of Medium: Online Resource
    ISSN: 1868-4483 , 1868-601X
    URL: Article
    DOI: 10.1007/s12975-021-00946-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2541897-X
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  • 3
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    Corrigendum to ‘Screening of Embolic Sources by Point-of-Care Ultrasound in the Acute Phase of Ischemic Stroke’ [Ultrasound in Med. & Biol. 46 (2020) 2173–2180]
    Elsevier BV ; 2021
    In:  Ultrasound in Medicine & Biology Vol. 47, No. 5 ( 2021-05), p. 1428-
    Details
    In: Ultrasound in Medicine & Biology, Elsevier BV, Vol. 47, No. 5 ( 2021-05), p. 1428-
    Type of Medium: Online Resource
    ISSN: 0301-5629
    URL: Article
    DOI: 10.1016/j.ultrasmedbio.2021.01.021
    RVK:
    XA 10000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2021
    detail.hit.zdb_id: 1498918-9
    SSG: 12
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  • 4
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    Workflows and Outcomes in Patients With Suspected Large Vessel Occlusion Stroke Triaged in Urban and Nonurban Areas
    Ovid Technologies (Wolters Kluwer Health) ; 2022
    In:  Stroke Vol. 53, No. 12 ( 2022-12), p. 3728-3740
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 53, No. 12 ( 2022-12), p. 3728-3740
    Abstract: We aim to compare the outcome of patients from urban areas, where the referral center is able to perform thrombectomy, with patients from nonurban areas enrolled in the RACECAT trial (Direct Transfer to an Endovascular Center Compared to Transfer to the Closest Stroke Center in Acute Stroke Patients With Suspected Large Vessel Occlusion). Methods: Patients with suspected large vessel occlusion stroke, as evaluated by a Rapid Arterial Occlusion Evaluation score of ≥5, from urban catchment areas of thrombectomy-capable centers during RACECAT trial enrollment period were included in the Stroke Code Registry of Catalonia. Primary outcome was disability at 90 days, as assessed by the shift analysis on the modified Rankin Scale score, in patients with an ischemic stroke. Secondary outcomes included mortality at 90 days, rate of thrombolysis and thrombectomy, time from onset to thrombolysis, and thrombectomy initiation. Propensity score matching was used to assemble a cohort of patients with similar characteristics. Results: The analysis included 1369 patients from nonurban areas and 2502 patients from urban areas. We matched 920 patients with an ischemic stroke from urban areas and nonurban areas based on their propensity scores. Patients with ischemic stroke from nonurban areas had higher degrees of disability at 90 days (median [interquartle range] modified Rankin Scale score, 3 [2–5] versus 3 [1–5], common odds ratio, 1.25 [95% CI, 1.06–1.48] ); the observed average effect was only significant in patients with large vessel stroke (common odds ratio, 1.36 [95% CI, 1.08–1.65]). Mortality rate was similar between groups(odds ratio, 1.02 [95% CI, 0.81–1.28] ). Patients from nonurban areas had higher odds of receiving thrombolysis (odds ratio, 1.36 [95% CI, 1.16–1.67]), lower odds of receiving thrombectomy(odds ratio, 0.61 [95% CI, 0.51–0.75] ), and longer time from stroke onset to thrombolysis (mean difference 38 minutes [95% CI, 25–52]) and thrombectomy(mean difference 66 minutes [95% CI, 37–95] ). Conclusions: In Catalonia, Spain, patients with large vessel occlusion stroke triaged in nonurban areas had worse neurological outcomes than patients from urban areas, where the referral center was able to perform thrombectomy. Interventions aimed at improving organizational practices and the development of thrombectomy capabilities in centers located in remote areas should be pursued. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT02795962.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/STROKEAHA.122.040768
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
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  • 5
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    Abstract WMP66: Multiparametric Neuroimaging And Its Association With Non-Contrast Computed Tomography In Late Window Large Vessel Occlusion Acute Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2022
    In:  Stroke Vol. 53, No. Suppl_1 ( 2022-02)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 53, No. Suppl_1 ( 2022-02)
    Abstract: Background: Endovascular treatment (EVT) for acute ischemic stroke (AIS) between 6 to 24 hours is established as a standard of care among patients selected by multiparametric neuroimaging. Therefore, we aimed to explore neuroimaging parameters in late window AIS large vessel occlusion (LVO) patients and the association between findings in non-contrast computed tomography (NCCT) and multiparametric CT. Methods: We included consecutive AIS patients within 6-24 hours from symptoms onset with CTA-LVO. We studied potential associations between computed tomography mismatch defined by DAWN and/or DEFUSE-3 neuroimaging criteria (CTP-MM), infarct volume on CTP, and ASPECTS on NCCT. We also analyzed the association between neuroimaging parameters and outcome determined by 90-day mRS. Results: We included 206 patients, of which 176 (85.4%) presented CTP-MM and 184 (89.3%) presented with an ASPECTS ≥ 6 on admission. The rate of CTP-MM was 90.8% in patients with ASPECTS ≥ 6, as compared with 40.9% in those with low ASPECTS [Figure 1A] . The ASPECTS correlated with infarct core, determined by Cerebral Blood Flow 〈 30% volume (rP=-0.575, P 〈 0.001). In EVT-treated patients (185, 89.8%), after adjusting for identifiable confounders, the presence of CTP-MM was a predictor of 90-day functional independence (OR 3.38; 95%CI 1.01-11.29; P=0.048). We did not find an association between CTP-MM and 90-day functional disability (ordinal mRS shift, aOR 1.39; 95% CI 0.58-3.34; P=0.459) [Figure 1B] . Conclusions: A great majority of patients who presented a LVO in late window fulfilled guidelines imaging criteria to undergo EVT, especially those with high ASPECTS (≥ 6). Our data suggest that NCCT with CT angiography is a reasonable approach for acute ischemic stroke treatment selection also in the late window.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.53.suppl_1.WMP66
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2022
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  • 6
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    Abstract TP128: Determinants of Hemorrhagic Transformation After Emergent Extracranial Internal Carotid Artery Stenting for Tandem Occlusions
    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: Background and Purpose: Extracranial internal carotid artery (ICA) lesion in the setting of tandem occlusions is a therapeutic challenge, and hemorrhagic transformation (HT) is one of the leading causes of poor clinical outcome. We aimed to determine determinants of HT for tandem occlusions undergoing emergent extracranial ICA stenting during endovascular treatment (EVT). Methods: We performed a prospective, observational cohort study of consecutive patients with non-cardioembolic ischemic stroke due to tandem occlusion who underwent EVT with extracranial ICA stent placement during the procedure from April 2013 to June 2019 in a single stroke center. We compared clinical (vascular risk factors, previous antiplatelet treatment, and IV rtPA), radiological (ASPECTS at admission and in-stent thrombosis at 24 hours) and serological (platelet count, fibrinogen, total cholesterol, HDL-cholesterol, and LDL-cholesterol) parameters according to the presence of HT in 24 hours CT-scan. Results: One-hundred and eight patients were included: 78.7% were men, mean age 68.5±14.3 years, median time from symptoms onset to treatment was 220 (150-337.5) minutes, median ASPECTS at admission was 9 (8-10). Eighty-six (79.6%) patients presented an extracranial ICA occlusion, and 22 (20.4%) a high-grade ( 〉 50%) stenosis. In 88 (81.5%) patients the etiology of extracranial ICA lesion was ateroma, and in 20 (18.5%) was a dissection. Intravenous rtPA was administered in 47 (43.5%) patients. Successful recanalization (mTICI ≥2b) was achieved in 83 (76.9%) patients, and extracranial ICA recanalization in 108 (100%) patients. Type 2 diabetes (OR 1.5, 95% CI 1.1-3.5), higher fibrinogen levels (OR 4.6, 95% CI 1.6-12.9), and ASPECTS 〈 7 at admission (OR 2.1, 95% IC 1.1-5.1) were found as independent predictors of HT in multiple logistic regression analysis. Conclusions: Patients with a non-cardioembolic ischemic stroke due to tandem occlusion who present type 2 diabetes, higher fibrinogen levels, or ASPECTS 〈 7 at admission are at high risk of HT. In these particular cases, it might be useful to stent with a stent that does not need double antiplatelet treatment immediately after the procedure.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.51.suppl_1.TP128
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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  • 7
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    Abstract WP69: Does CBF Below 30% Actually Represent Infarct Core in Acute Ischemic Stroke? Proof of Mis-Concept
    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: On CT perfusion (CTP), cerebral blood flow 〈 30% than the contralateral hemisphere (CBF 〈 30) is considered a marker of infarct core. Our hypothesis is that CBF 〈 30 defines a reversible poor hemodynamic area rather than core and aimed to study CBF 〈 30 evolution over time, its relationship with leptomeningeal collateral circulation (CC) and outcome parameters. Methods: Retrospective analysis of a prospective database of acute ischemic strokes who underwent CTP on admission and immediately after endovascular thrombectomy (EVT). CC was graded on CT angiography (CTA) by the modified Tan scale (good CC: 2-3 grades). Complete recanalization was defined by modified Thrombolysis in Cerebral Ischemia ≥ 2B. Final infarct volume (FIV) was semi-automatically measured on 48-72h CT; ghost core was defined as: admission CBF 〈 30 - FIV 〉 10cc. Results: We included 494 patients; median time from onset to CT: 137 min (IQR 68-238). Median CBF 〈 30 volume on admission: 8 cc (0-28). With longer onset-to-CT times ischemic changes progressively increased on non-contrast CT (ASPECTS decay r=-0.21, p 〈 0.01), however CBF 〈 30 progressively decreased (r=-0.13, p 〈 0.01). 294 patients (60.6%) presented good CC. Good CC was associated with lower admission CBF 〈 30 (median CBF 〈 30 on good CC: 0 cc (0-12) vs 28.5 (7-57) on poor CC, p 〈 0.01). In recanalized patients (419, 84.8%), CBF 〈 30 virtually disappeared in CTP post-EVT (n=103) (median CBF 〈 30: 0ml (IQR 0) (88%= 0 cc) despite that most patients developed established infarcts (median FIV 16 (4-50), 59% FIV 〉 10cc)). Even in recanalized patients, baseline CBF 〈 30 only moderately correlates with FIV (r=0.55, p 〈 0.01). A ghost core was identified in 13.7% (34.5% if CT was performed 〈 90min from onset). 46.6% patients had good functional outcome (mRS 〈 3 at 3 months). A multivariate analysis of recanalized patients showed that CC (OR 0.43, CI 0.27-0.69, p 〈 0.01) but not CBF 〈 30 was an independent predictor of functional outcome. Conclusion: CBF 〈 30 represents an hemodynamic state rather than established infarct core, evolving over time inversely as it should physiologically (increase of infarct core over time). CBF 〈 30 should be considered as an outcome predictor but not used as exclusion criterion for EVT, especially in early time-windows.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.51.suppl_1.WP69
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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  • 8
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    Abstract P624: High Detection of Atrial Fibrillation by 90 Days Textil Holter Monitoring in Patients With Cryptogenic Stroke
    Ovid Technologies (Wolters Kluwer Health) ; 2021
    In:  Stroke Vol. 52, No. Suppl_1 ( 2021-03)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 52, No. Suppl_1 ( 2021-03)
    Abstract: Introduction: External recorders allow for low-cost, non-invasive 1 to 4 weeks monitoring. However, the first 3 months of monitoring duration are the most effective to detect atrial fibrillation (AF). We show the results of the Thunder registry of patients monitored to detect AF during 90 days from the stroke. Methods: A prospective observational study was conducted with consecutive inclusion of patients with cryptogenic stroke after work up (neuroimaging, echocardiography and 24-hour cardiac monitoring) in 5 Comprenhensive Stroke Centers. Patients were continuously monitored for 90 days with a wearable Holter (Nuubo®) after the first 24 hours of the stroke onset. We analyzed the percentage of AF detection in each period (percentage of AF among those monitored), the quality of the monitoring (monitoring time), the percentage of AF by intention to monitor (detection of AF among patient included). Demographic, clinical and echocardiographic predictors of AF detection beyond one week of cardiac monitoring were assessed. Results: A total of 254 patients were included. The cumulative incidence of AF detection at 90 days was 34.84%. The monitoring time was similar among the 3 months (30 days: 544.9 hours Vs 60 days: 505.9 hours Vs 90 days: 591.25 hours) (p=0.512). The number of patients who abandoned monitoring was 7% (18/254). The cumulative percentage of intention to detect AF was 30.88% (Figure). Patients who completed monitoring beyond 30 days had higher score on the NIHSS basal scale (NIHSS 9 IQR 2-17) VS (NIHSS 3 IQR 1-9) (p=0.024). Patients with left atrial volume greater than 28.5ml/m2 had higher risk of cumulative incidence of AF according to the Kaplan Meyer curve beyond the first week of monitoring OR 2.72 (Log-rank (Mantel-Cox test) (p 〈 0.001). Conclusions: In conclusion, intensive 90-day- Holter monitoring with textile Holter was feasible and detected high percentage of AF. Enlarged left atrial volume predicted AF beyond the first week of monitoring.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.52.suppl_1.P624
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
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  • 9
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    Abstract P318: Ischemic Core Overestimation on Computed Tomography Perfusion
    Ovid Technologies (Wolters Kluwer Health) ; 2021
    In:  Stroke Vol. 52, No. Suppl_1 ( 2021-03)
    Details
    In: Stroke, Ovid Technologies (Wolters Kluwer Health), Vol. 52, No. Suppl_1 ( 2021-03)
    Abstract: Introduction: Different studies have pointed that CT perfusion(CTP) could overestimate ischemic core in early time window. We aim to evaluate the influence of time and collateral status on ischemic core overestimation. Methods: Retrospective single-center study including patients with anterior circulation large-vessel stroke that achieved reperfusion after endovascular treatment. Ischemic core and collateral status were automatically estimated on baseline CTP using available software. CTP-derived core was considered as tissue with a relative reduction of cerebral blood flow 〈 30%. Collateral status was assessed using the hypoperfusion intensity ratio(defined by the proportion of the Tmax 〉 6 seconds with Tmax 〉 10 seconds, HIR). Final infarct was measured on 24-48 hours non-contrast CT. Ischemic core overestimation was considered when CTP-derived core was larger than final infarct. Results: Four-hundred and seven patients were included in the analysis. Median CTP-derived core and final infarct were 7mL(IQR 0-27) and 20mL(IQR 5-55), respectively. Median HIR was 0.46(IQR 0.23-0.59). 83 patients(21%) presented ischemic core overestimation(median overestimation, 12mL(IQR 5-41)). Multivariable logistic regression analysis adjusted by CTP-derived core and confounding variables showed that poor collateral status (per 0.1 HIR increase, adjusted odds ratio(aOR) 1.41, 95% confidence interval(CI)1.20-1.65) and earlier onset to imaging time(per 60 minutes earlier, aOR 1.14, CI1.04-1.25) were independently associated with ischemic core overestimation. No significant association was found with imaging to reperfusion time(per 30 minutes earlier, aOR 1.17 CI0.96-1.44). Poor collateral status influence on ischemic core overestimation differed according to onset to imaging time, with a stronger size of effect on early imaging patients(pinteraction 〈 0.01). Conclusion: In patients with large vessel stroke that achieve reperfusion after endovascular therapy, poor collateral status might induce higher rates of ischemic core overestimation on CTP, especially in patients in earlier window time. CTP reflects a hemodynamic state rather than tissue fate; collateral status and onset to imaging time are important factors to estimate ischemic core on CTP.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.52.suppl_1.P318
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2021
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  • 10
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    Abstract WP104: Defining a Target Population to Effectively Test a Neuroprotective Drug
    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: We aim to define a target population of stroke patients treated with EVT, in whom a potential neuroprotective (NP) drug has highest chances to show clinical and radiological positive effects. Methods: we studied stroke patients treated with EVT. CBF 〈 30% on admission CTP determined infarct core. Final infarct volume (FIV) was measured on 24-48h CT and NIHSS at discharge/day 5 (dNIHSS). We analyzed the clinical impact of absolute (1cc) and relative (30%) NP-mediated FIV reductions in dNIHSS. Segmented linear regressions were used to identify significant breakpoints in FIV/dNIHSS association. Models were adjusted for age, sex and baseline NIHSS. Results: We included 211 patients, mean FIV was 39(±58)cc and median dNIHSS 6(1-15). FIV strongly correlated to dNIHSS (rs=0.74; p 〈 0.01). We defined 3 subgroups: minimal (≤1cc), moderate (2-80cc) and large (≥80cc) FIV. A) FIV ≤1 (22.3% of patients): mean FIV was 0.23±0.4cc, median NIHSS was 1(0-3). Neither absolute (1cc) nor 30% relative (-0.07±0.1cc) FIV reduction showed a significant impact in dNIHSS (±0 points). B) FIV 2-80cc (59.7%): mean FIV was 22.9±18.3cc, median dNIHSS was 7(2-13). Per each cc FIV reduction dNIHSS decreased by 0.23 (CI 0.17-0.29) points. A 30% reduction in mean FIV (6.9cc) may lower dNIHSS 1.6 points. C) FIV≥80cc (18%): mean FIV was 143±66cc, median dNIHSS was 19(12-30). Per each cc FIV reduction dNIHSS decreased by 0.07 (CI 0.03-0.12). A 30% reduction in mean FIV (43cc) may reduce dNIHSS 3 points. An infarct core 〈 5cc (Sn 73%, Sp 75%; AUC 0.8, CI 0.74-0.86) predicted FIV ≤1cc. An infarct core≥30cc predicted FIV≥80cc (Sn 71%; Sp 85%; AUC 0.87; CI 0.8-0.93). Conclusion: One in 4 patients will develop minimal FIV, including these patients in NP trials may dilute a treatment effect and reduce odds of positive results. In large FIV patients, mild relative clinical impacts may become relevant due to substantial absolute FIV reductions. Admission CTP may help sorting patients according to expected drug effect profile.
    Type of Medium: Online Resource
    ISSN: 0039-2499 , 1524-4628
    URL: Article
    DOI: 10.1161/str.51.suppl_1.WP104
    RVK:
    XA 10000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
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