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  • 1
    In: Cerebrovascular Diseases, S. Karger AG, Vol. 18, No. 4 ( 2004), p. 296-303
    Abstract: Internal carotid artery dissection (ICAD) is a frequent etiology of stroke in the young. Immediate anticoagulation with unfractionated heparin is the most frequent treatment. A theoretical side effect of unfractionated heparin is an increase in the intramural hematoma resulting in hemodynamic cerebral infarction. We studied 20 patients with ICAD. All patients were immediately treated with unfractionated heparin. Activated partial thromboplastin time (aPTT) ratios were measured twice daily. We prospectively monitored the course of ICAD with repeated ultrasound in hospital. Unexpectedly, delayed ICA occlusion was noted in 5 patients under treatment. One of these developed a watershed infarct. We then analyzed the aPTT ratios over the first 6 days after diagnosis. Patients with delayed occlusion had significantly higher aPTT ratios (2.6 ± 0.4 vs. 2.0 ± 0.5, p 〈 0.05). Within the limits of a partially retrospective design, our study seems to support the notion that unfractionated heparin can increase the intramural hematoma. Our findings further justify a randomized clinical trial to resolve the anticoagulant/antiplatelet debate.
    Type of Medium: Online Resource
    ISSN: 1015-9770 , 1421-9786
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2004
    detail.hit.zdb_id: 1482069-9
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  • 2
    In: Cerebrovascular Diseases, S. Karger AG, Vol. 48, No. 3-6 ( 2019), p. 244-250
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 Internal carotid artery occlusion (ICAO) is an important risk factor for stroke. Cerebral hemodynamics in patients with ICAO depends on the individual capacity to activate sufficient collateral pathways. Therefore, the assessment of intracranial collaterals is essential for the acute and long-term management of these patients and accurate estimation of further stroke risk. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 Acute stroke patients with unilateral ICAO were prospectively enrolled. We assessed the following collaterals by transcranial color-coded sonography (TCCS): the anterior and posterior communicating artery (ACoA, PCoA), the ophthalmic artery (OA), and leptomeningeal collaterals of the posterior cerebral artery (LMC). We subdivided the flow pattern of the Doppler spectrum in the middle cerebral artery (MCA) into 3 categories: (1) good, (2) moderate, and (3) bad according to the hemodynamic effects on the ipsilateral MCA flow. Finally, we compared the individual TCCS results with the stroke pattern detected on CT or MRI scan. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 One hundred thirteen patients (age 66 ± 12 years; ­female 24) were included. The collateral status was good, moderate, and bad in 59 (52%), 37 (33%), and 17 (15%) patients, respectively. The ACoA collateral was most frequently activated (81%), followed by the OA (63%), the PCoA (53%), and the LMC (22%). The quality of the collateral status was determined by the type ( 〈 i 〉 p 〈 /i 〉 = 0.0003) but not by the number ( 〈 i 〉 p 〈 /i 〉 = 0.19) of activated collateral pathways. Good collateral function was highly associated with primary collaterals (ACoA & #x3e; PCoA). Best parameter for a good collateral status was an antegrade flow in the OA, indicating a high blood supply via the communicating arteries. 〈 b 〉 〈 i 〉 Conclusions: 〈 /i 〉 〈 /b 〉 TCCS allows the assessment of intracranial collaterals and their hemodynamic capacity. Prevalence of collateral sufficiency in ICAO seems to be higher than previously reported. ACoA cross flow is essential for the optimal hemodynamic compensation of ICAO. Antegrade OA flow indicates good collateral status.
    Type of Medium: Online Resource
    ISSN: 1015-9770 , 1421-9786
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2019
    detail.hit.zdb_id: 1482069-9
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  • 3
    Online Resource
    Online Resource
    S. Karger AG ; 2005
    In:  European Neurology Vol. 53, No. 1 ( 2005), p. 36-38
    In: European Neurology, S. Karger AG, Vol. 53, No. 1 ( 2005), p. 36-38
    Type of Medium: Online Resource
    ISSN: 0014-3022 , 1421-9913
    RVK:
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2005
    detail.hit.zdb_id: 1482237-4
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  • 4
    In: Cerebrovascular Diseases, S. Karger AG, Vol. 42, No. 1-2 ( 2016), p. 81-89
    Abstract: 〈 b 〉 〈 i 〉 Background: 〈 /i 〉 〈 /b 〉 Dysphagia is associated with poor outcome in stroke patients. Studies investigating the association of dysphagia and early dysphagia screening (EDS) with outcomes in patients with acute ischemic stroke (AIS) are rare. The aims of our study are to investigate the association of dysphagia and EDS within 24 h with stroke-related pneumonia and outcomes. 〈 b 〉 〈 i 〉 Methods: 〈 /i 〉 〈 /b 〉 Over a 4.5-year period (starting November 2007), all consecutive AIS patients from 15 hospitals in Schleswig-Holstein, Germany, were prospectively evaluated. The primary outcomes were stroke-related pneumonia during hospitalization, mortality, and disability measured on the modified Rankin Scale ≥2-5, in which 2 indicates an independence/slight disability to 5 severe disability. 〈 b 〉 〈 i 〉 Results: 〈 /i 〉 〈 /b 〉 Of 12,276 patients (mean age 73 ± 13; 49% women), 9,164 patients (74%) underwent dysphagia screening; of these patients, 55, 39, 4.7, and 1.5% of patients had been screened for dysphagia within 3, 3 to 〈 24, 24 to ≤72, and 〉 72 h following admission. Patients who underwent dysphagia screening were likely to be older, more affected on the National Institutes of Health Stroke Scale score, and to have higher rates of neurological symptoms and risk factors than patients who were not screened. A total of 3,083 patients (25.1%; 95% CI 24.4-25.8) had dysphagia. The frequency of dysphagia was higher in patients who had undergone dysphagia screening than in those who had not (30 vs. 11.1%; p 〈 0.001). During hospitalization (mean 9 days), 1,271 patients (10.2%; 95% CI 9.7-10.8) suffered from stroke-related pneumonia. Patients with dysphagia had a higher rate of pneumonia than those without dysphagia (29.7 vs. 3.7%; p 〈 0.001). Logistic regression revealed that dysphagia was associated with increased risk of stroke-related pneumonia (OR 3.4; 95% CI 2.8-4.2; p 〈 0.001), case fatality during hospitalization (OR 2.8; 95% CI 2.1-3.7; p 〈 0.001) and disability at discharge (OR 2.0; 95% CI 1.6-2.3; p 〈 0.001). EDS within 24 h of admission appeared to be associated with decreased risk of stroke-related pneumonia (OR 0.68; 95% CI 0.52-0.89; p = 0.006) and disability at discharge (OR 0.60; 95% CI 0.46-0.77; p 〈 0.001). Furthermore, dysphagia was independently correlated with an increase in mortality (OR 3.2; 95% CI 2.4-4.2; p 〈 0.001) and disability (OR 2.3; 95% CI 1.8-3.0; p 〈 0.001) at 3 months after stroke. The rate of 3-month disability was lower in patients who had received EDS (52 vs. 40.7%; p = 0.003), albeit an association in the logistic regression was not found (OR 0.78; 95% CI 0.51-1.2; p = 0.2). 〈 b 〉 〈 i 〉 Conclusions: 〈 /i 〉 〈 /b 〉 Dysphagia exposes stroke patients to a higher risk of pneumonia, disability, and death, whereas an EDS seems to be associated with reduced risk of stroke-related pneumonia and disability.
    Type of Medium: Online Resource
    ISSN: 1015-9770 , 1421-9786
    Language: English
    Publisher: S. Karger AG
    Publication Date: 2016
    detail.hit.zdb_id: 1482069-9
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