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Berlin, Germany

Puetz V.,Dresden University Stroke Center | Bodechtel U.,Dresden University Stroke Center | Gerber J.C.,Dresden University Stroke Center | Dzialowski I.,Dresden University Stroke Center | And 12 more authors.
Neurology | Year: 2013

Objective: To determine the reliability and therapeutic impact of standardized cerebral CT evaluation and quantification of early ischemic changes (EIC) with the Alberta Stroke Program Early CT Score (ASPECTS) by stroke neurologists in the Stroke Eastern Saxony Network (SOS-NET), which provides telemedical consultations for patients with acute ischemic stroke. Methods: Two neuroradiologists re-evaluated all CT scans of consecutive SOS-NET patients in 2009 blinded to clinical information providing reference standard. We defined discrepant CT findings as all false-positive or false-negative EIC and brain pathology findings and ASPECTS deviations >1 point. We subsequently discussed the clinical impact of discrepant CT findings unblinded to clinical information. Weighted kappa (kw) statistic was used to determine the interobserver agreement for ASPECTS. Results: Of 582 patients, complete imaging data were available for 536 patients (351 cerebralischemic events, 105 primary intracranial hemorrhages, and 80 stroke mimics). The neuroradiologists detected discrepant CT findings in 43 patients (8.0%) that were rated as clinically relevant in 9 patients (1.7%). Stroke neurologists recommended IV thrombolysis in 8 patients despite extensive EIC (ASPECTS ≤5). One of these patients had symptomatic intracranial hemorrhage. In 1 nonthrombolyzed patient, the stroke neurologist missed subdural hematoma. The interobserver agreement on ASPECTS between stroke neurologists and expert readers was substantial (kw = 0.62; 95% confidence interval 0.54-0.71). Conclusions: Clinically relevant misinterpretation of the CT scans was rare in our acute telestroke service. ASPECTS is a reliable tool to assess the extent of EICby stroke neurologists in telemedicine in real time. Copyright © 2013 American Academy of Neurology.

Royl G.,Charite - Medical University of Berlin | Royl G.,Center for Stroke Research | Ploner C.J.,Charite - Medical University of Berlin | Leithner C.,Charite - Medical University of Berlin | Leithner C.,NeuroCure Research Center
European Neurology | Year: 2011

Background: Dizziness is among the most frequent neurological chief complaints in emergency room (ER) patients. Although the majority of underlying disorders are benign, serious causes that require immediate in-hospital treatment may occur that are difficult to identify clinically. Methods: Retrospective study of 475 consecutive ER neurological consultations with dizziness as the chief complaint. Results: Of all ER dizziness patients, 73% were initially assigned to benign and 27% to serious diagnoses. The two most frequent disorders were benign paroxysmal positional vertigo (22%) and stroke (20%). On follow-up (available in 124 patients), 43% of all ER diagnoses were corrected: 6% of benign ER diagnoses were corrected to serious diagnoses, 23% of serious ER diagnoses were revised to benign. The most frequent corrections concerned patients with an ER diagnosis of stroke or vestibular neuronitis. Conclusions: In the patient sample studied here, serious causes of dizziness were more prevalent than can be expected from population-based surveys or data from specialized outpatient departments. However, inappropriate assignment of dizziness patients to benign diagnoses still occurred in a relevant proportion of patients. ER clinical pathways, planning of imaging resources and followup of patients in- and outside the hospital must take these points into consideration. Copyright © 2011 S. Karger AG, Basel.

Cramer L.,Applied Cachexia Research | Hildebrandt B.,Charite Medical School | Kung T.,Applied Cachexia Research | Wichmann K.,Applied Cachexia Research | And 12 more authors.
Journal of the American College of Cardiology | Year: 2014

Background Patients with colorectal cancer (CRC) often present with dyspnea and fatigue. These are also frequent symptoms in patients with chronic heart failure (CHF).Objectives We hypothesized that similar patterns of cardiovascular perturbations are present in CRC and CHF.Methods We prospectively studied 50 patients with CRC, 51 patients with CHF, and 51 control subjects. The CRC group was divided into 2 subgroups: patients who underwent chemotherapy (n = 26) and chemotherapy-naive patients (n = 24). We assessed exercise capacity (spiroergometry), cardiac function (echocardiography), heart rate variability (Holter electrocardiography), body composition (dual-energy x-ray absorptiometry), and blood parameters.Results Compared with the control arm, the left ventricular ejection fraction (CRC group 59.4%; control group 62.5%) and exercise performance as assessed by peak oxygen consumption (peak VO2) (CRC group 21.8 ml/kg/min; control group 28.0 ml/kg/min) were significantly reduced in CRC patients (both p < 0.02). Markers of heart rate variability were markedly impaired in CRC patients compared with control subjects (all p < 0.008). Compared with the control group, the CRC group also showed reduced lean mass in the legs and higher levels of the endothelium-derived C-terminal-pro-endothelin-1 (both p < 0.02). Major determinants of cardiovascular function were impaired in chemotherapy-treated patients and in the chemotherapy-naive patients, particularly with regard to exercise capacity, left ventricular ejection fraction, lean mass, and heart rate variability (all p < 0.05 vs. control subjects).Conclusions Some aspects of cardiovascular function are impaired in patients with CRC. More importantly, our findings were evident independently of whether patients were undergoing chemotherapy. © 2014 American College of Cardiology Foundation.

Schabitz W.R.,University of Munster | Laage R.,SYGNIS Bioscience | Vogt G.,SYGNIS Bioscience | Koch W.,HaaPACS GmbH | And 11 more authors.
Stroke | Year: 2010

Background and Purpose: Granulocyte colony-stimulating factor (G-CSF) is a promising stroke drug candidate. The present phase IIa study assessed safety and tolerability over a broad dose range of G-CSF doses in acute ischemic stroke patients and explored outcome data. Methods: Four intravenous dose regimens (total cumulative doses of 30-180 μg/kg over the course of 3 days) of G-CSF were tested in 44 patients in a national, multicenter, randomized, placebo-controlled dose escalation study (NCT00132470; www.clinicaltrial.gov). Main inclusion criteria were a 12-hour time window after stroke onset, infarct localization to the middle cerebral artery territory, a baseline National Institutes of Health Stroke Scale range of 4 to 22, and presence of diffusion-weighted imaging/perfusion-weighted imaging mismatch. Results: Concerning the primary safety end points, we observed no increase of thromboembolic events in the active treatment groups, and no increase in related serious adverse events. G-CSF led to expected increases in neutrophils and monocytes that resolved rapidly after end of treatment. We observed a clinically insignificant drug-related decrease of platelets. As expected from the low number of patients, we did not observe significant differences in clinical outcome in treatment vs. placebo. In exploratory analyses, we observed an interesting dose-dependent beneficial effect of treatment in patients with DWI lesions >14-17 cm. Conclusions: We conclude that G-CSF was well-tolerated even at high dosages in patients with acute ischemic stroke, and that a substantial increase in leukocytes appears not problematic in stroke patients. In addition, exploratory analyses suggest treatment effects in patients with larger baseline diffusion-weighted imaging lesions. The obtained data provide the basis for a second trial aimed to demonstrate safety and efficacy of G-CSF on clinical end points. © 2010 American Heart Association, Inc.

De Silva D.A.,Royal Melbourne Hospital | De Silva D.A.,National Neuroscience Institute | Brekenfeld C.,National Stroke Research Institute | Ebinger M.,Royal Melbourne Hospital | And 11 more authors.
Stroke | Year: 2010

Background and Purpose-In ischemic stroke, the site of arterial obstruction has been shown to influence recanalization and clinical outcomes. However, this has not been studied in randomized controlled trials, nor has the impact of arterial obstruction site on reperfusion and infarct growth been assessed. We studied the influence of site and degree of arterial obstruction patients enrolled in the Echoplanar Imaging Thrombolytic Evaluation Trial (EPITHET). Methods-EPITHET was a prospective, randomized, placebo-controlled trial of intravenous tissue plasminogen activator (tPA) in the 3-to 6-hour time window. Arterial obstruction site and degree were rated on magnetic resonance angiography blinded to treatment allocation and outcomes. Results-In 101 EPITHET patients, 87 had adequate quality magnetic resonance angiography, of whom 54 had baseline arterial obstruction. Infarct growth attenuation was greater in those with tPA treatment compared to placebo among patients with middle cérébral artery (MCA) obstruction (P=0.037). The treatment benefit of tPA over placebo in attenuating infarct growth was greater for MCA than internal carotid artery (ICA) obstruction (P=0.060). With tPA treatment, good clinical outcome was more likely with MCA than with ICA obstruction (P=0.005). Most patients with ICA obstruction did not achieve good clinical outcome, whether treated with tPA (100%) or placebo (77%). The study was underpowered to prove any treatment benefit of tPA among patients with any or severe degree of arterial obstruction. Conclusions-Arterial obstruction site strongly predicts outcomes. ICA obstruction carries a uniformly poor prognosis, whereas good outcomes with MCA obstruction are associated with tPA therapy. Copyright © 2010 American Heart Association. All rights reserved.

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