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ESTUDIOS


01 julio 2012

STROKE. The Course of Unilateral Intracranial Arteriopathy in Young Adults With Arterial Ischemic Stroke

Marcel M.M. Bulder, MD; Kees P.J. Braun, MD; Jan Willem Leeuwis, MD; Rob T.H. Lo, MD; Onno van Nieuwenhuizen, MD; L. Jaap Kappelle, MD; Catharina J.M. Klijn, MD

Background and Purpose—Unilateral intracranial focal nonprogressive arteriopathy is often found in children with arterial ischemic stroke. We aimed to investigate the course of unilateral intracranial arteriopathy in young adults.

01 junio 2013

JACC. Association of the Recovery of Objective Abnormal Cerebral Perfusion With Neurocognitive Improvement After Carotid Revascularization

Ching-Chang Huang, MD; Ying-Hsien Chen, MD; Mao-Shin Lin, MD; Cheng-Hsin Lin, MD; Hung-Yuan Li, MD, PhD; Ming-Jang Chiu, MD, PhD; Chi-Chao Chao, MD; Yen-Wen Wu, MD, PhD; Ya-Fang Chen, MD; Jen-Kuang Lee, MD; Ming-Jiuh Wang, MD, PhD; Ming-Fong Chen, MD, PhD; Hsien-Li Kao, MD

Objectives: This study sought to report the effect of carotid artery stenting (CS) on neurocognitive function (NCF) in patients with severe carotid artery occlusive disease, depending on baseline brain perfusion status.

01 junio 2013

JACC. Asymptomatic Carotid Stenosis: The Not-So-Silent Disease. Changing Perspectives From Thromboembolism to Cognition

Adnan H. Siddiqui, MD, PhD; L. Nelson Hopkins, MD

More than 100,000 carotid revascularization procedures are performed annually in the United States, primarily for asymptomatic stenosis to improve flow and provide protection from thromboembolic events to the ipsilateral hemisphere. Indications for asymptomatic carotid stenosis revascularization stem from ACAS (Asymptomatic Carotid Atherosclerosis Study) and ACST (Asymptomatic Carotid Surgery Trial) (1,). In ACST, there was a reduction in cerebral ischemic events from 11.8% in patients treated with aspirin alone to 6.4% in those undergoing endarterectomy for ≥60% carotid stenosis over 5 years. Despite the benefit for revascularization of carotid stenosis of at least 60% in ACAS and ACST, most subsequent trials have established a higher standard for asymptomatic disease with inclusion criteria established at 80% carotid stenosis.

20 mayo 2013

JACC. Renal Impairment and Ischemic Stroke Risk Assessment in Patients With Atrial Fibrillation. The Loire Valley Atrial Fibrillation Project

Objectives: This study sought to determine the risk of ischemic stroke (IS)/thromboembolism (TE) associated with renal impairment and its incremental predictive value over established risk stratification scores (congestive heart failure, hypertension, age ≥75 years, diabetes, previous stroke [CHADS2] and congestive heart failure, hypertension, age ≥75 years, diabetes, previous stroke, vascular disease, age 65 to 74 years, sex category (female) [CHA2DS2-VASc]) in patients with atrial fibrillation (AF).

01 junio 2012

CIRCULATION. Ticagrelor Versus Clopidogrel in Patients With Acute Coronary Syndromes and a History of Stroke or Transient Ischemic Attack

Stefan K. James, MD, PhD; Robert F. Storey, MD, DM; Nardev S. Khurmi, MD; Steen Husted, MD, DSc; Matyas Keltai, MD, PhD; Kenneth W. Mahaffey, MD; Juan Maya, MD, MS; Joao Morais, MD; Renato D. Lopes, MD, PhD; Jose C. Nicolau, MD, PhD; Prem Pais, MD; Dimitar Raev, MD, ScD; Jose L. Lopez-Sendon, MD, PhD; Susanna R. Stevens, MS; Richard C. Becker, MD for the PLATO Study Group

Background—Patients with acute coronary syndromes and history of stroke or transient ischemic attack (TIA) have an increased rate of recurrent cardiac events and intracranial hemorrhages.

01 mayo 2013

NEUROSURGERY. Mechanisms of Stroke After Intracranial Angioplasty and Stenting in the SAMMPRIS Trial

Derdeyn, Colin P. MD; Fiorella, David MD, PhD; Lynn, Michael J. MS; Rumboldt, Zoran MD; Cloft, Harry J. MD, PhD; Gibson, Daniel MD; Turan, Tanya N. MD; Lane, Bethany F. RN; Janis, L. Scott PhD; Chimowitz, Marc I. MB, ChB; for the Stenting and Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis Trial Investigators

BACKGROUND: Enrollment in the Stenting and Aggressive Medical Management for the Prevention of stroke in Intracranial Stenosis (SAMMPRIS) trial was halted owing to higher-than-expected 30-day stroke rates in the stenting arm. Improvement in periprocedural stroke rates from angioplasty and stenting for intracranial atherosclerotic disease (ICAD) requires an understanding of the mechanisms of these events.

01 mayo 2013

NEUROSURGERY. Endovascular Therapy in Acute Ischemic Stroke

Starke, Robert M.; Komotar, Ricardo J.; Connolly, E. Sander

Large vessel thrombosis accounts for a significant proportion of morbidity and mortality in the setting of acute ischemic stroke.1,2 Despite many trials, only limited therapies have been approved for ischemic stroke including care at a stroke center, use of aspirin to decrease further clot formation, and revascularization within 4.5 with recombinant tissue plasminogen activator (t-PA). Specific endovascular therapies has also been approved, but with significant controversy.3

01 junio 2013

NEUROSURGERY. Blood Pressure Control for Spontaneous Intracerebral Hemorrhage: Does Blood Pressure Control Cause Perihematoma Ischemia?

El Ahmadieh, Tarek Y.; El Tecle, Najib E.; Lall, Rishi R.; Park, Anne E.; Bendok, Bernard R.

Spontaneous or nontraumatic intracerebral hemorrhage (ICH) is an important cause of mortality and morbidity worldwide.1 Management of patients presenting with spontaneous ICH includes medical therapy and, if indicated, surgical intervention.1,2 Acute reduction of elevated blood pressure is an important component of the initial medical management of such patients. This can be justified by the fact that elevated blood pressure in the setting of ICH may lead to hematoma expansion and is therefore associated with poor clinical outcome.3-5 A question that remains unanswered, however, is whether an early and rapid reduction in systolic blood pressure (SBP) could worsen outcome by causing ischemia in perihematoma brain tissue.6,7 To study this important issue, Butcher et al conducted a prospective randomized clinical trial in which 75 patients presenting with spontaneous ICH were randomized into two different target treatment groups.8,9 The study focused on evaluating the perihematoma relative cerebral blood flow (CBF) and the clinical outcome associated with each target treatment. The results were published in the March 2013 issue of Stroke.8

01 junio 2013

NEUROSURGERY. Treatment of Ruptured Intracranial Aneurysms: Comparison of Stenting and Balloon Remodeling

Chitale, Rohan MD; Chalouhi, Nohra MD; Theofanis, Thana BS; Starke, Robert M. MD, MSc; Amenta, Peter MD; Jabbour, Pascal MD; Tjoumakaris, Stavropoula MD; Dumont, Aaron S. MD; Rosenwasser, Robert H. MD; Gonzalez, L. Fernando MD

BACKGROUND: Stent-assisted coiling (SAC) and balloon-assisted coiling (BAC) are 2 well-established techniques for the treatment of complex and wide-necked intracranial aneurysms. Most clinicians are reluctant to perform SAC in the setting of subarachnoid hemorrhage because of the need for dual antiplatelet therapy.

01 junio 2013

NEUROSURGERY. Long-term Economic Impact of Coiling vs Clipping for Unruptured Intracranial Aneurysms

Lad, Shivanand P. MD, PhD; Babu, Ranjith MS; Rhee, Michael S. MD; Franklin, Robbi L. MD; Ugiliweneza, Beatrice PhD, MSPH; Hodes, Jonathan MD; Nimjee, Shahid M. MD, PhD; Zomorodi, Ali R. MD; Smith, Tony P. MD; Friedman, Allan H. MD; Patil, Chirag G. MD; Boakye, Maxwell MD

BACKGROUND: Treatment of unruptured intracranial aneurysms (UIAs) involves endovascular coiling or aneurysm clipping. While many studies have compared these treatment modalities with respect to various clinical outcomes, few studies have investigated the economic costs associated with each procedure.

01 junio 2012

RADIOLOGY. Endovascular Treatment of Intracranial Unruptured Aneurysms: A Systematic Review of the Literature on Safety with Emphasis on Subgroup Analyses

Olivier N. Naggara, MD, PhD, Augustin Lecler, Catherine Oppenheim, MD, PhD, Jean-Francois Meder, MD, PhD and Jean Raymond, MD

Purpose: To report subgroup analyses of an updated systematic review on endovascular treatment of intracranial unruptured aneurysms (UAs); to compare types of embolic agents, adjunct techniques, and newer devices; and to identify potential risk factors for poor outcomes.

01 enero 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Carotid Baroreceptor Reaction after Stenting in 2 Locations of Carotid Bulb Lesions of Different Embryologic Origin

D.C. Suha, J.L. Kima, E.H. Kima, J.K. Kimc, J.-H. Shin, D.H. Hyun, H.Y. Lee, D.H. Lee and J.S. Kim

BACKGROUND AND PURPOSE: The carotid bulb is innervated by the sinus nerve of Hering, a branch of the glossopharyngeal nerve, derived from the third pharyngeal arch. The aim of this study was to determine the frequency, predictors, and outcome of the carotid BR after carotid stent placement according to the location of the plaque lesion.

01 enero 2012

AMERICAN JOURNAL OF NEURORADIOLOGY. Diagnosis of Recanalization of the Intracranial Artery Has Poor Inter-Rater Reliability

M. Bar, R. Mikulik, T. Jonszta, A. Krajina, M. Roubec, D. Skoloudik and V. Prochazka

BACKGROUND AND PURPOSE: Recanalization is the important outcome measure for acute stroke therapy. Several methods of recanalization assessment are used in clinical practice, but few studies have addressed their reliability. We, therefore, sought to assess interobserver reliability of the diagnosis of intracranial artery recanalization following intervention by using TIMI criteria.

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