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ESTUDIOS


24 noviembre 2015

STROKE. Clinical Sciences. An International Standard Set of Patient-Centered Outcome Measures After Stroke

Joel Salinas, MD, MBA; Sara M. Sprinkhuizen, PhD, MSc; Teri Ackerson, SCRN, BSN; Julie Bernhardt, PT, PhD; Charlie Davie, MD; Mary G. George, MD, MSPH; Stephanie Gething, Dip COT, MSc; Adam G. Kelly, MD; Patrice Lindsay, RN, PhD; Liping Liu, MD; Sheila C.O. Martins, MD, PhD; Louise Morgan, MSN, CPHQ; Bo Norrving, MD, PhD; Gerard M. Ribbers, MD, PhD; Frank L. Silver, MD; Eric E. Smith, MD, MPH; Linda S. Williams, MD; Lee H. Schwamm, MD

Background and Purpose: Value-based health care aims to bring together patients and health systems to maximize the ratio of quality over cost. To enable assessment of healthcare value in stroke management, an international standard set of patient-centered stroke outcome measures was defined for use in a variety of healthcare settings.

24 noviembre 2015

STROKE. Clinical Sciences. Different Antiplatelet Strategies in Patients With New Ischemic Stroke While Taking Aspirin

Joon-Tae Kim, MD, PhD; Man-Seok Park, MD, PhD; Kang-Ho Choi, MD, PhD; Ki-Hyun Cho, MD, PhD; Beom Joon Kim, MD, PhD; Moon-Ku Han, MD, PhD; Tai Hwan Park, MD, PhD; Sang-Soon Park, MD; Kyung Bok Lee, MD, PhD; Byung-Chul Lee, MD, PhD; Kyung-Ho Yu, MD, PhD; Mi Sun Oh, MD, PhD; Jae Kwan Cha, MD, PhD; Dae-Hyun Kim, MD, PhD; Hyun-Wook Nah, MD, PhD; Jun Lee, MD, PhD; Soo Joo Lee, MD, PhD; Young-Chai Ko, MD; Jae Guk Kim, MD; Jong-Moo Park, MD, PhD; Kyusik Kang, MD; Yong-Jin Cho, MD, PhD; Keun-Sik Hong, MD, PhD; Jay Chol Choi, MD, PhD; Dong-Eog Kim, MD, PhD; Wi-Sun Ryu, MD; Dong-Ick Shin, MD, PhD; Min-Ju Yeo, MD; Wook-Joo Kim, MD; Juneyoung Lee, PhD; Ji Sung Lee, PhD; Jeffrey L. Saver, MD, PhD; Hee-Joon Bae, MD, PhD

Background and Purpose—Selecting among different antiplatelet strategies when patients experience a new ischemic stroke while taking aspirin is a common clinical challenge, currently addressed by a paucity of data.

05 noviembre 2015

STROKE. Clinical Sciences. Impact of Collateral Status Evaluated by Dynamic Computed Tomographic Angiography on Clinical Outcome in Patients With Ischemic Stroke

Ido R. van den Wijngaard, MD; Jelis Boiten, MD, PhD; Ghislaine Holswilder, MSc; Ale Algra, MD, PhD; Diederik W.J. Dippel, MD, PhD; Birgitta K. Velthuis, MD, PhD; Marieke J.H. Wermer, MD, PhD*; Marianne A.A. van Walderveen, MD, PhD*

Background and Purpose: Status of collateral circulation is a strong predictor of outcome after acute ischemic stroke. Our aim was to compare the predictive value of strategies for collateral blood flow assessment with dynamic computed tomographic angiography (CTA) and conventional single-phase CT angiography.

06 octubre 2015

STROKE. Clinical Sciences. Differences in Common Genetic Predisposition to Ischemic Stroke by Age and Sex

Matthew Traylor, PhD; Loes C.A. Rutten-Jacobs, PhD; Elizabeth G. Holliday, PhD; Rainer Malik, PhD; Cathie Sudlow, FRCP(E); Peter M. Rothwell, FMedSci; Jane M. Maguire, PhD; Simon A. Koblar, MD; Steve Bevan, PhD; Giorgio Boncoraglio, MD; Martin Dichgans, MD; Chris Levi, MD; Cathryn M. Lewis, PhD; Hugh S. Markus, DM

Background and Purpose: Evidence from epidemiological studies points to differences in factors predisposing to stroke by age and sex. Whether these arise because of different genetic influences remained untested. Here, we use data from 4 genome-wide association data sets to study the relationship between genetic influence on stroke with both age and sex.

29 septiembre 2015

STROKE. Clinical Sciences. Differences Between US and UK Adults in Stroke Preparedness

Stephan U. Dombrowski, PhD; Gary A. Ford, FRCP; Lewis B. Morgenstern, MD; Martin White, MD; Falko F. Sniehotta, PhD; Joan E. Mackintosh, MSc; Paul Gellert, PhD; Lesli E. Skolarus, MD

Background and Purpose: Although time-dependent treatment is available, most people delay contacting emergency medical services for stroke. Given differences in the healthcare system and public health campaigns, exploring between-country differences in stroke preparedness may identify novel ways to increase acute stroke treatment.

18 noviembre 2014

STROKE. Improving Outcomes in Patients With Carotid Stenosis. Call for Better Research Opportunities and Standards

Anne L. Abbott, PhD, FRACP, MBBS; Andrew N. Nicolaides, MS, FRCS, PhD

Knowing how to best prevent stroke in patients with carotid artery stenosis is of major public health importance because carotid stenosis is common in older people and causes ≈10% of all strokes.1 For decades it has been thought that patients with carotid plaques showing a predominance of echolucent tissue by ultrasound imaging have higher stroke risk and are more likely to benefit from carotid procedures.2 The accompanying meta-analysis by Gupta et al3 is important because it demonstrates that predominantly echolucent asymptomatic carotid plaques carry ≈2.5× the risk of ipsilateral stroke over the next 2 years or so compared with predominantly echogenic plaques. The meta-analysis also shows that predominantly echolucent plaques are common, making up 23% of stenosing or nonstenosing plaques and 31% of plaques causing ≥50% stenosis.

09 diciembre 2014

STROKE. Clinical Sciences. Residual High-Grade Stenosis After Recanalization of Extracranial Carotid Occlusion in Acute Ischemic Stroke

Merel J.A. Luitse, MD; Birgitta K. Velthuis, MD; Meenakshi Dauwan, MD; Jan Willem Dankbaar, MD; Geert Jan Biessels, MD; L. Jaap Kappelle, MD; on behalf of the Dutch Acute Stroke Study Group

Background and Purpose: Residual stenosis after recanalization of an acute symptomatic extracranial occlusion of the internal carotid artery (ICA) might be an indication for carotid endarterectomy. We evaluated the proportion of residual high-grade stenosis (≥70%, near occlusions not included) on follow-up imaging in a consecutive series of patients with an acute symptomatic occlusion of the extracranial ICA.

18 noviembre 2014

STROKE. Clinical Sciences. Ischemic Stroke and Intracranial Hemorrhage With Aspirin, Dabigatran, and Warfarin

Chi-Wai Ho, MBBS*; Mei-Han Ho, MBBS*; Pak-Hei Chan, MBBS; Jo-Jo Hai, MBBS; Emmanuel Cheung, MBBS; Chun-Yip Yeung, MBBS; Kui-Kai Lau, MBBS; Koon-Ho Chan, MD; Chu-Pak Lau, MD; Gregory Y.H. Lip, MD; Gilberto Ka-Kit Leung, MS; Hung-Fat Tse, MD, PhD; Chung-Wah Siu, MD

Background and Purpose: Little is known about the impact of quality of anticoagulation control, as reflected by time in therapeutic range (TTR), on the effectiveness and safety of warfarin therapy in Chinese patients with atrial fibrillation. We investigated the risks of ischemic stroke and intracranial hemorrhage (ICH) in relation to warfarin at various TTRs in a real-world cohort of Chinese patients with atrial fibrillation receiving warfarin and compared with those on dabigatran, aspirin, and no therapy.

18 noviembre 2014

STROKE. Clinical Sciences. Plaque Echolucency and Stroke Risk in Asymptomatic Carotid Stenosis

Ajay Gupta, MD; Kartik Kesavabhotla, MD; Hediyeh Baradaran, MD; Hooman Kamel, MD; Ankur Pandya, PhD; Ashley E. Giambrone, PhD; Drew Wright, MS, MLS; Kevin J. Pain, BA; Edward E. Mtui, MD; Jasjit S. Suri, MS, MBA, PhD; Pina C. Sanelli, MD, MPH; Alvin I. Mushlin, MD, ScM

Background and Purpose: Ultrasonographic plaque echolucency has been studied as a stroke risk marker in carotid atherosclerotic disease. We performed a systematic review and meta-analysis to summarize the association between ultrasound-determined carotid plaque echolucency and future ipsilateral stroke risk.

11 noviembre 2014

STROKE. Clinical Sciences. Increased Risk for Intracranial Arterial Stenosis in Subjects With Coronary Artery Calcification

Hyung-Geun Oh, MD, PhD; Pil-Wook Chung, MD, PhD; Eun-Jung Rhee, MD, PhD

Background and Purpose: Intracranial arterial stenosis (ICAS) is considered an important cause of stroke in Asians. Coronary artery calcification (CAC) is a surrogate marker for subclinical atherosclerosis. We aimed to analyze the association of ICAS assessed by transcranial Doppler ultrasonography and CAC in middle-aged Korean population.

21 octubre 2014

STROKE. Clinical Sciences. Mechanisms of Unexplained Neurological Deterioration After Intravenous Thrombolysis

Marie Tisserand, MD*; Pierre Seners, MSc*; Guillaume Turc, MD; Laurence Legrand, MD; Marc-Antoine Labeyrie, MD; Sylvain Charron, PhD; Jean-François Méder, PhD; Jean-Louis Mas, MD; Catherine Oppenheim, PhD†; Jean-Claude Baron, ScD†

Background and Purpose: Unstable clinical course characterizes the first 24 hours after thrombolysis for anterior circulation stroke, including early neurological deterioration (END), a secondary complication consistently predictive of poor outcome. Apart from straightforward causes, such as intracerebral hemorrhage and malignant edema, the mechanism of END remains unclear in the majority of cases (ENDunexplained). Based on the core/penumbra model, we tested the hypothesis that ENDunexplained is caused by infarct growth beyond the initial penumbra and assessed the associated vascular patterns.

07 octubre 2014

STROKE. Clinical Sciences. Application of Single-Stage Stereotactic Radiosurgery for Cerebral Arteriovenous Malformations >10 cm3

Shunya Hanakita, MD; Tomoyuki Koga, MD, PhD; Masahiro Shin, MD, PhD; Hiroshi Igaki, MD, PhD; Nobuhito Saito, MD, PhD

Background and Purpose: Stereotactic radiosurgery (SRS) is a safe and effective treatment for small arteriovenous malformations (AVMs), the use of this modality for the treatment of large AVMs is still controversial, although it has been used in difficult cases. The aim of this study was to evaluate the treatment outcomes of patients who underwent single-stage SRS for large AVMs and to discuss the role of SRS in the treatment of these challenging lesions.

01 noviembre 2015

DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY. Single-stage endovascular treatment in patients with severe extracranial large vessel stenosis and concomitant ipsilateral unruptured intracranial aneurysm

Emre Kaçar 1 , Ömer Fatih Nas 2 , Cüneyt Erdoğan 2 , Bahattin Hakyemez 2

PURPOSE: We aimed to evaluate the safety and effectiveness of single-stage endovascular treatment in patients with severe extracranial large vessel stenosis and concomitant ipsilateral unruptured intracranial aneurysm.

09 julio 2015

AMERICAN JOURNAL OF NEURORADIOLOGY. Single-Layer WEBs: Intrasaccular Flow Disrupters for Aneurysm Treatment—Feasibility Results from a European Study

J. Caroff, C. Mihalea, J. Klisch, C. Strasilla, A. Berlis, T. Patankar, W. Weber, D. Behme, E.A. Jacobsen, T. Liebig, S. Prothmann, C. Cognard, T. Finkenzeller, J. Moret and L. Spelle

BACKGROUND AND PURPOSE: The safety and efficiency of the dual-layer Woven EndoBridge (WEB) device has already been published. However, this international multicenter study sought to evaluate the safety of single-layer devices, which are the newest generation of the WEB intrasaccular flow-disrupter family. They have been designed to offer smaller-sized devices with a lower profile to optimize navigability and delivery, which may, in turn, broaden their range of use.

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