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ESTUDIOS


30 junio 2015

STROKE. Clinical Sciences. Effects of Centralizing Acute Stroke Services on Stroke Care Provision in Two Large Metropolitan Areas in England

Angus I.G. Ramsay, PhD; Stephen Morris, PhD; Alex Hoffman, MSc; Rachael M. Hunter, MSc; Ruth Boaden, PhD; Christopher McKevitt, PhD; Catherine Perry, PhD; Nanik Pursani, MA; Anthony G. Rudd, MB, BChir; Simon J. Turner, PhD; Pippa J. Tyrrell, MD; Charles D.A. Wolfe, MD; Naomi J. Fulop, PhD

Background and Purpose: In 2010, Greater Manchester and London centralized acute stroke care into hyperacute units (Greater Manchester=3, London=8), with additional units providing ongoing specialist stroke care nearer patients’ homes. Greater Manchester patients presenting within 4 hours of symptom onset were eligible for hyperacute unit admission; all London patients were eligible. Research indicates that postcentralization, only London’s stroke mortality fell significantly more than elsewhere in England. This article attempts to explain this difference by analyzing how centralization affects provision of evidence-based clinical interventions.

07 julio 2015

STROKE. Clinical Sciences. Cluster Randomized Controlled Trial. Clinical and Cost-Effectiveness of a System of Longer-Term Stroke Care

Anne Forster, PhD; John Young, MSc; Katie Chapman, PhD; Jane Nixon, PhD; Anita Patel, PhD; Ivana Holloway, MSc; Kirste Mellish, PhD; Shamaila Anwar, PhD; Rachel Breen, PhD; Martin Knapp, PhD; Jenni Murray, PhD; Amanda Farrin, MSc

Background and Purpose: We developed a new postdischarge system of care comprising a structured assessment covering longer-term problems experienced by patients with stroke and their carers, linked to evidence-based treatment algorithms and reference guides (the longer-term stroke care system of care) to address the poor longer-term recovery experienced by many patients with stroke.

09 julio 2015

STROKE. Clinical Sciences. Antithrombotic Treatment Following Intracerebral Hemorrhage in Patients With and Without Atrial Fibrillation

Johanna Pennlert, MD; Kjell Asplund, MD, PhD; Bo Carlberg, MD, PhD; Per-Gunnar Wiklund, MD, PhD; Aase Wisten, MD, PhD; Signild Åsberg, MD, PhD; Marie Eriksson, PhD

Background and Purpose: Patients who survive intracerebral hemorrhage (ICH) often have compelling indications for anticoagulant and antiplatelet medication. This nationwide observational study aimed to determine the extent and predictors of antithrombotic treatment after ICH in Sweden.

28 mayo 2015

STROKE. Clinical Sciences. Different Imaging Strategies in Patients With Possible Basilar Artery Occlusion. Cost-Effectiveness Analysis

Sebastian E. Beyer; Myriam G. Hunink, MD, PhD; Florian Schöberl, MD; Louisa von Baumgarten, MD; Steffen E. Petersen, MD, DPhil; Martin Dichgans, MD; Hendrik Janssen, MD; Birgit Ertl-Wagner, MD; Maximilian F. Reiser, MD; Wieland H. Sommer, MD, MPH

Background and Purpose: This study evaluated the cost-effectiveness of different noninvasive imaging strategies in patients with possible basilar artery occlusion.

11 junio 2015

STROKE. Clinical Sciences. Comparison of Acute Stroke Preparedness Strategies to Decrease Emergency Department Arrival Time in a Multiethnic Cohort. The Stroke Warning Information and Faster Treatment Study

Bernadette Boden-Albala, DrPH; Joshua Stillman, MD; Eric T. Roberts, MPH; Leigh W. Quarles, MPH; M. Maria Glymour, ScD; Ji Chong, MD; Harmon Moats, MPH; Veronica Torrico, MA; Michael C. Parides, PhD

Background and Purpose: Less than 25% of stroke patients arrive to an emergency department within the 3-hour treatment window. Stroke Warning Information and Faster Treatment (SWIFT) compared an interactive intervention (II) with enhanced educational (EE) materials on recurrent stroke arrival times in a prospective cohort of multiethnic stroke/transient ischemic attack survivors.

23 abril 2015

STROKE. Editorial. Reperfusion Versus Recanalization: The Winner Is…

Jenny P. Tsai, MDCM; Gregory W. Albers, MD

The terms reperfusion and recanalization are sometimes erroneously used interchangeably when referring to outcomes of thrombolytic or endovascular therapies. Recanalization and reperfusion are neither discrete nor static measures and although achieving one often implies the other has also occurred. Arterial obstructions and perfusion deficits can both evolve independently over time, in the early hours not only after stroke onset but also after therapeutic interventions. Distinguishing reperfusion from recanalization can be challenging in the clinical arena because currently available noninvasive measurements from multimodal computed tomography or magnetic resonance imaging (MRI) have imperfect sensitivity and specificity.

05 mayo 2015

STROKE. Obesity Increases Stroke Risk in Young Adults. Opportunity for Prevention

Walter N. Kernan, MD; Jennifer L. Dearborn, MD, MPH

A debate has been smoldering over the meaning of obesity in reducing the world burden of stroke. Like so many debates in medicine, it begins with disagreements about the interpretation of evidence, the meaning of statistical test results, and the role of bias. In one camp, are those who see that obesity is associated with increased risk for stroke and say that it as an important target for primary and secondary prevention. In the other, are those who agree that obesity increases stroke but say that it is more effective to treat the consequence of obesity that are responsible for stroke risk (ie, hypertension and dyslipidemia) than obesity itself.

07 mayo 2015

STROKE. Clinical Sciences. Is Blood Pressure Control for Stroke Prevention the Correct Goal?

George Howard, DrPH; Maciej Banach, MD, PhD; Mary Cushman, MD; David C. Goff, MD, PhD; Virginia J. Howard, PhD; Daniel T. Lackland, DrPH; Jim McVay, DrPA; James F. Meschia, MD; Paul Muntner, PhD; Suzanne Oparil, MD; Melanie Rightmyer, DNP; Herman A. Taylor, MD

Background and Purpose: Although pharmacological treatment of hypertension has important health benefits, it does not capture the benefit of maintenance of ideal health through the prevention or delay of hypertension.

07 mayo 2015

STROKE. Clinical Sciences. Common NOTCH3 Variants and Cerebral Small-Vessel Disease

Loes C.A. Rutten-Jacobs, PhD*; Matthew Traylor, PhD*; Poneh Adib-Samii, MBBS; Vincent Thijs, MD; Cathie Sudlow, MD; Peter M. Rothwell, MD; Giorgio Boncoraglio, MD; Martin Dichgans, MD; Steve Bevan, PhD; James Meschia, MD; Christopher Levi, MD; Natalia S. Rost, MD; Jonathan Rosand, MD; Ahamad Hassan, MRCP; Hugh S. Markus, MD

Background and Purpose: The most common monogenic cause of cerebral small-vessel disease is cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy, caused by NOTCH3 gene mutations. It has been hypothesized that more common variants in NOTCH3 may also contribute to the risk of sporadic small-vessel disease. Previously, 4 common variants (rs10404382, rs1043994, rs10423702, and rs1043997) were found to be associated with the presence of white matter hyperintensity in hypertensive community-dwelling elderly.

13 mayo 2014

STROKE. Clinical Sciences. Drivers of Costs Associated With Reperfusion Therapy in Acute Stroke

Kit N. Simpson, DrPH; Annie N. Simpson, PhD; Patrick D. Mauldin, PhD; Michael D. Hill, MD; Sharon D. Yeatts, PhD; Judith A. Spilker, BSN; Lydia D. Foster, MS; Pooja Khatri, MD; Renee Martin, PhD; Edward C. Jauch, MD; Dawn Kleindorfer, MD; Yuko Y. Palesch, PhD; Joseph P. Broderick, MD; for the IMS III Investigators

Background and Purpose: The Interventional Management of Stroke (IMS) III study tested the effect of intravenous tissue-type plasminogen activator (tPA) alone when compared with intravenous tPA followed by endovascular therapy and collected cost data to assess the economic implications of the 2 therapies. This report describes the factors affecting the costs of the initial hospitalization for acute stroke subjects from the United States.

29 abril 2014

STROKE. Clinical Sciences. Intravenous Thrombolysis of Basilar Artery Occlusion. Thrombus Length Versus Recanalization Success

Daniel Strbian, MD, PhD, MSc (Stroke Med), FESO; Tiina Sairanen, MD, PhD, MSc (Stroke Med); Heli Silvennoinen, MD, PhD; Oili Salonen, MD, PhD; Perttu J. Lindsberg, MD, PhD, FESO

Background and Purpose: In middle cerebral artery occlusion, probability of recanalization after intravenous tissue-type plasminogen activator thrombolysis (IVT) was reported to drop <1% for thrombi exceeding 8 mm. We aimed to evaluate the effect of thrombus length and location on success of recanalization after IVT in basilar artery occlusion.

01 mayo 2014

STROKE. Clinical Sciences. Long-Term Outcome of 106 Consecutive Pediatric Ruptured Brain Arteriovenous Malformations After Combined Treatment

Thomas Blauwblomme, MD; Marie Bourgeois, MD; Philippe Meyer, MD; Stéphanie Puget, MD, PhD; Federico Di Rocco, MD, PhD; Nathalie Boddaert, MD, PhD; Michel Zerah, MD, PhD; Francis Brunelle, MD, PhD; Christian Sainte Rose, MD, PhD; Olivier Naggara, MD, PhD

Background and Purpose: Childhood intracerebral hemorrhage is mainly attributable to underlying brain arteriovenous malformations (bAVMs). Multimodal treatment options for bAVMs include microsurgery and embolization, allowing an immediate cure, and radiosurgery, entailing longer obliteration times. Follow-up data on pediatric ruptured bAVMs are scarce, making it difficult to assess the risk of subsequent intracerebral hemorrhage. Our aim was to assess the clinical and angiographic outcome and to analyze risk factors for rebleeding during and after combined treatment of pediatric bAVMs.

17 abril 2014

STROKE. The Art of Estimating Outcomes and Treating Patients With Stroke in the 21st Century

Gustavo Saposnik, MD, MSc, FRCPC

Clinicians, patients, and their families usually inquire about an expected outcome after an acute event, the response to thrombolysis, and endovascular therapy. Some clinicians use their past experience or weight risk factors known to influence stroke outcomes. These factors can be categorized as follows: (1) patient-level factors (eg, age, stroke severity, comorbid conditions), (2) physician-level factors (eg, specialty, years of experience), and (3) institutional-level factors (eg, Joint Commission on Accreditation of Healthcare Organizations affiliation, stroke center, annual volume of stroke admissions).

05 junio 2014

STROKE. Clinical Sciences. Cognitive Deterioration in Bilateral Asymptomatic Severe Carotid Stenosis

Laura Buratti, MD; Clotilde Balucani, MD; Giovanna Viticchi, MD; Lorenzo Falsetti, MD; Claudia Altamura, MD; Emma Avitabile, MD; Leandro Provinciali, MD; Fabrizio Vernieri, MD; Mauro Silvestrini, MD

Background and Purpose: This study aimed to monitor cognitive performance during a 3-year period in subjects with bilateral asymptomatic severe internal carotid artery stenosis and to explore the role of cerebral hemodynamics and atherosclerotic disease in the development of cognitive dysfunction.

29 mayo 2014

STROKE. Clinical Sciences. Impact of Collaterals on Successful Revascularization in Solitaire FR With the Intention for Thrombectomy

David S. Liebeskind, MD; Reza Jahan, MD; Raul G. Nogueira, MD; Osama O. Zaidat, MD; Jeffrey L. Saver, MD; for the SWIFT Investigators

Background and Purpose: Collaterals at angiography before endovascular therapy were analyzed to ascertain the effect on a novel end point of successful revascularization without symptomatic hemorrhage in the Solitaire FR With the Intention for Thrombectomy (SWIFT) study.

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