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Cryptogenic stroke

K-W Nam, C K Kim, T J Kim, S J An, A M Demchuk, Y Kim, S Jung, M-K Han, S-B Ko, B-W Yoon
BACKGROUND AND PURPOSE: The occurrence of stroke in cancer patients is caused by conventional vascular risk factors and cancer-specific mechanisms. However, cryptogenic stroke in patients with cancer was considered to be more related to cancer-specific hypercoagulability. In this study, we investigated the potential of the D-dimer level to serve as a predictor of early neurologic deterioration (END) in cryptogenic stroke patients with active cancer. METHODS: We recruited 109 cryptogenic stroke patients with active cancer within 72 h of symptom onset...
October 20, 2016: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
James E Dalen, Joseph S Alpert
A new suspected cause of cryptic strokes is "silent atrial fibrillation". Pacemakers and other implanted devices allow continuous recording of cardiac rhythm for months or years. They have discovered that short periods of atrial fibrillation lasting minutes or hours are frequent and usually are asymptomatic. A meta-analysis of 50 studies involving more than 10,000 patients with a recent stroke found that 7.7% had atrial fibrillation on their admitting EKG. In 3 weeks during and after hospitalization, another 16...
October 15, 2016: American Journal of Medicine
Ezgi Yetim, Mehmet Akif Topcuoglu, Ugur Canpolat, Rahsan Gocmen, Kader K Oguz, Necla Ozer, Kudret Aytemir, Ethem Murat Arsava
BACKGROUND: Short-lasting (<30 s), nonsustained episodes of atrial fibrillation (NS-AF) are considered a risk factor for future development of paroxysmal or persistent AF. Nonetheless, their causal role in stroke pathogenesis is currently unknown. In this study we determined the frequency of NS-AF, together with the associated clinical and imaging features, in stroke-free controls and ischemic stroke patients. METHODS AND RESULTS: A total of 332 controls, ≥50 years of age and no prior history of stroke or AF, were evaluated with 24-hour Holter monitoring for the presence of <30-s-long AF episodes...
September 30, 2016: Journal of the American Heart Association
(no author information available yet)
No abstract text is available yet for this article.
September 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Lili Zhang, Alan Z Segal, Dana Leifer, Roy L Silverstein, Linda M Gerber, Richard B Devereux, Jorge R Kizer
Protein Z (PZ) is a vitamin K-dependent plasma protein that exhibits both pro- and anticoagulant properties. Both low and high PZ levels have been linked to ischaemic stroke. Although PZ-lowering gene variants have been found to be less common in ischaemic stroke, the relationship remains unclear. We investigated PZ levels and PROZ variants in a multi-ethnic case-control study of unexplained stroke in participants aged 18 to 64. Plasma PZ was measured in cases (≥2 months post-stroke) and controls. PZ polymorphisms G79A (rs3024735) and A13G (2273971) were genotyped...
September 29, 2016: Thrombosis and Haemostasis
Eleni Korompoki, Angela Del Giudice, Steffi Hillmann, Uwe Malzahn, David J Gladstone, Peter Heuschmann, Roland Veltkamp
BACKGROUND AND PURPOSE: The detection rate of atrial fibrillation has not been studied specifically in transient ischemic attack (TIA) patients although extrapolation from ischemic stroke may be inadequate. We conducted a systematic review and meta-analysis to determine the rate of newly diagnosed atrial fibrillation using different methods of ECG monitoring in TIA. METHODS: A comprehensive literature search was performed following a pre-specified protocol the PRISMA statement...
September 28, 2016: International Journal of Stroke: Official Journal of the International Stroke Society
Jelle Demeestere, Steffen Fieuws, Maarten G Lansberg, Robin Lemmens
BACKGROUND: Recent trials have demonstrated that extended cardiac monitoring increases the yield of paroxysmal atrial fibrillation (AF) detection in patients with cryptogenic stroke. The utility of extended cardiac monitoring is uncertain among patients with stroke caused by small and large vessel disease. We conducted a meta-analysis to estimate the yield of AF detection in this population. METHODS AND RESULTS: We searched PubMed, Cochrane, and SCOPUS databases for studies on AF detection in stroke patients and excluded studies restricted to patients with cryptogenic stroke or transient ischemic attack...
2016: Journal of the American Heart Association
Shadi Yaghi, Ava L Liberman, Michael Atalay, Christopher Song, Karen L Furie, Hooman Kamel, Richard A Bernstein
Stroke of undetermined aetiology or 'cryptogenic' stroke accounts for 30-40% of ischaemic strokes despite extensive diagnostic evaluation. The role and yield of cardiac imaging is controversial. Cardiac MRI (CMR) has been used for cardiac disorders, but its use in cryptogenic stroke is not well established. We reviewed the literature (randomised trials, exploratory comparative studies and case series) on the use of CMR in the diagnostic evaluation of patients with ischaemic stroke. The literature on the use of CMR in the diagnostic evaluation of ischaemic stroke is sparse...
September 22, 2016: Journal of Neurology, Neurosurgery, and Psychiatry
Prajwal Dhakal, Vivek Verma, Vijaya R Bhatt
No abstract text is available yet for this article.
September 15, 2016: New England Journal of Medicine
J David Spence
No abstract text is available yet for this article.
September 15, 2016: New England Journal of Medicine
Jeffrey L Saver
No abstract text is available yet for this article.
September 15, 2016: New England Journal of Medicine
Alessio Galli, Francesco Ambrosini, Federico Lombardi
Holter monitors are tools of proven efficacy in diagnosing and monitoring cardiac arrhythmias. Despite the fact their use is widely prescribed by general practitioners, little is known about their evolving role in the management of patients with cryptogenic stroke, paroxysmal atrial fibrillation, unexplained recurrent syncope and risk stratification in implantable cardioverter defibrillator or pacemaker candidates. New Holter monitoring technologies and loop recorders allow prolonged monitoring of heart rhythm for periods from a few days to several months, making it possible to detect infrequent arrhythmias in patients of all ages...
August 2016: Arrhythmia & Electrophysiology Review
George Ntaios, Vasileios Papavasileiou, Gregory Y H Lip, Haralampos Milionis, Konstantinos Makaritsis, Anastasia Vemmou, Eleni Koroboki, Efstathios Manios, Konstantinos Spengos, Patrik Michel, Konstantinos Vemmos
BACKGROUND: There is increasing debate whether atrial fibrillation (AF) episodes during follow-up in patients with embolic stroke of undetermined source (ESUS) are causally associated with the event. AF-related strokes are more severe than strokes of other etiologies. In this context, we aimed to compare stroke severity between ESUS patients diagnosed with AF during follow-up and those who were not. We hypothesized that, if AF episodes detected during follow-up are indeed causally associated with the index event, stroke severity in the AF group should be higher than the non-AF group...
September 6, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
Dániel Bereczki, Norbert Szegedi, Zoltán Szakács, István Gubucz, Zsolt May
An estimated 25-40% of ischemic strokes are classified as cryptogenic, which means the cause of the cerebral infarction remains unidentified. One of the potential pathomechanisms - especially among young patients with no cardiovascular risk factors - is paradoxical embolism through a patent foramen ovale. Pregnancy, cesarean delivery and the postpartum period are associated with an increased risk of cerebrovascular events. Factors that may contribute to ischemic strokes during gestation and puerperium include classic cardiovascular risk factors, changes in hemostaseology/hemodynamics, and pregnancy-specific disorders such as pre-eclampsia, eclampsia, postpartum cerebral angiopathy or peripartum cardiomyopathy...
2016: Neurologia i Neurochirurgia Polska
Valentina Favalli, Eliana Disabella, Mariadelfina Molinaro, Marilena Tagliani, Anna Scarabotto, Alessandra Serio, Maurizia Grasso, Nupoor Narula, Carmela Giorgianni, Clelia Caspani, Monica Concardi, Manuela Agozzino, Calogero Giordano, Alexandra Smirnova, Takahide Kodama, Lorenzo Giuliani, Elena Antoniazzi, Riccardo G Borroni, Camilla Vassallo, Filippo Mangione, Laura Scelsi, Stefano Ghio, Carlo Pellegrini, Marialuisa Zedde, Laura Fancellu, GianPietro Sechi, Antonello Ganau, Stefania Piga, Annarita Colucci, Daniela Concolino, Maria Teresa Di Mascio, Danilo Toni, Marina Diomedi, Claudio Rapezzi, Elena Biagini, Massimiliano Marini, Maurizia Rasura, Maurizio Melis, Antonia Nucera, Donata Guidetti, Michelangelo Mancuso, Umberto Scoditti, Pamela Cassini, Jagat Narula, Luigi Tavazzi, Eloisa Arbustini
BACKGROUND: Anderson-Fabry disease (AFD) is a rare X-linked lysosomal storage disease, caused by defects of the alpha-galactosidase A (GLA) gene. AFD can affect the heart, brain, kidney, eye, skin, peripheral nerves, and gastrointestinal tract. Cardiology (hypertrophic cardiomyopathy), neurology (cryptogenic stroke), and nephrology (end-stage renal failure) screening studies suggest the prevalence of GLA variants is 0.62%, with diagnosis confirmation in 0.12%. OBJECTIVES: This study sought to expand screening from these settings to include ophthalmology, dermatology, gastroenterology, internal medicine, pediatrics, and medical genetics to increase diagnostic yield and comprehensively evaluate organ involvement in AFD patients...
September 6, 2016: Journal of the American College of Cardiology
Alessandro Pezzini, Mario Grassi, Corrado Lodigiani, Rosalba Patella, Carlo Gandolfo, Andrea Zini, Maria Luisa DeLodovici, Maurizio Paciaroni, Massimo Del Sette, Antonella Toriello, Rossella Musolino, Rocco Salvatore Calabrò, Paolo Bovi, Alessandro Adami, Giorgio Silvestrelli, Maria Sessa, Anna Cavallini, Simona Marcheselli, Domenico Marco Bonifati, Nicoletta Checcarelli, Lucia Tancredi, Alberto Chiti, Elisabetta Del Zotto, Giampaolo Tomelleri, Alessandra Spalloni, Elisa Giorli, Paolo Costa, Giacomo Giacalone, Paola Ferrazzi, Loris Poli, Andrea Morotti, Valeria Piras, Maurizia Rasura, Anna Maria Simone, Massimo Gamba, Paolo Cerrato, Maria Luisa Zedde, Giuseppe Micieli, Maurizio Melis, Davide Massucco, Davide Guido, Valeria De Giuli, Silvia Bonaiti, Cataldo D'Amore, Sara La Starza, Licia Iacoviello, Alessandro Padovani
BACKGROUND: We sought to compare the benefit of percutaneous closure to that of medical therapy alone for the secondary prevention of embolism in patients with patent foramen ovale (PFO) and otherwise unexplained ischemic stroke, in a propensity scored study. METHODS AND RESULTS: Between 2000 and 2012, we selected consecutive first-ever ischemic stroke patients aged 18 to 45 years with PFO and no other cause of brain ischemia, as part of the IPSYS registry (Italian Project on Stroke in Young Adults), who underwent either percutaneous PFO closure or medical therapy for comparative analysis...
September 2016: Circulation. Cardiovascular Interventions
Azadeh Beheshtian, Sanyog G Shitole, Alan Z Segal, Dana Leifer, Russell P Tracy, Daniel J Rader, Richard B Devereux, Jorge R Kizer
BACKGROUND AND AIMS: Circulating lipoprotein (a) [Lp(a)] level relates inversely to apolipoprotein (a) [apo(a)] size. Both smaller apo(a) isoforms and higher Lp(a) levels have been linked to coronary heart disease and stroke, but their independent contributions are less well defined. We examined the role of Lp(a) in younger adults with cryptogenic stroke. METHODS: Lp(a) and apo(a) isoforms were evaluated in a prospectively designed case-control study of patients with unexplained ischemic stroke and stroke-free controls, ages 18 to 64...
October 2016: Atherosclerosis
James E Dalen, Joseph S Alpert
More than 25% of all ischemic strokes per year are cryptogenic, that is, their cause is not determined after an appropriate evaluation. In 1988, it was reported that the incidence of a patent foramen ovale was 30 to 40% in young patients with a cryptogenic stroke compared with 25% in the general population. This led to the suspicion that cryptogenic strokes were due to paradoxical embolism, that is, a venous thrombus crossing a patent foramen ovale to enter the left atrium and then the arterial circulation...
August 24, 2016: American Journal of Medicine
Nazem Akoum
Atrial fibrillation (AF) is directly implicated in embolic stroke and suspected in a large proportion of cryptogenic stroke. The current stroke-prevention strategy in embolic and cryptogenic stroke starts with arrhythmia detection, followed by risk stratification and treatment for those deemed to be at increased risk. This approach is practical and widespread; however, more recent findings have questioned its validity. Arrhythmia detection is dependent on the length and fidelity of monitoring. Long-term monitoring using implanted recorders improves arrhythmia detection in patients with cryptogenic stroke...
August 24, 2016: Heart: Official Journal of the British Cardiac Society
Allan Davies, Avedis Ekmejian, Nicholas Collins, Rohan Bhagwandeen
BACKGROUND: Percutaneous patent foramen ovale (PFO) closure is a therapeutic option to prevent recurrent cerebral ischaemia in patients with cryptogenic stroke and transient cerebral ischaemia (TIA). The apparent lack of benefit seen in previous randomised trials has, in part, reflected inclusion of patients with alternate mechanisms of stroke. The role of formal neurology involvement in accurately delineating the likely aetiology of stroke or TIA is crucial in appropriate identification of patients for device closure...
August 5, 2016: Heart, Lung & Circulation
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