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Acute carotid artery

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https://www.readbyqxmd.com/read/28916637/effect-of-increases-in-cardiac-contractility-on-cerebral-blood-flow-in-humans
#1
Shigehiko Ogoh, Gilbert Moralez, Takuro Washio, Satyam Sarma, Michinari Hieda, Steven A Romero, Matthew N Cramer, Manabu Shibasaki, Craig G Crandall
The effect of acute increases in cardiac contractility on cerebral blood flow (CBF) remains unknown. We hypothesized that the external carotid artery (ECA) downstream vasculature modifies the direct influence of acute increases in heart rate and cardiac function on CBF regulation. Twelve healthy subjects received two infusions of dobutamine (first a low dose; 5 μg/kg/min and then a high dose; 15 μg/kg/min) for 12 min each. Cardiac output, blood flow through the internal carotid artery (ICA) and ECA and echocardiographic measurements were performed during dobutamine infusions...
September 15, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28904450/acute-ischemic-stroke-treatment-using-mechanical-thrombectomy-a-study-of-137-patients
#2
Rakeshsingh K Singh, Vishal Annaji Chafale, Rakesh Shyam Lalla, Keyurkumar Chandrakantbhai Panchal, Anil Pandurang Karapurkar, Satish Vasant Khadilkar, Pawan K Ojha, Yogesh Godge, Rakesh K Singh, Rajesh Benny
BACKGROUND: Mechanical thrombectomy (MT) is the most effective treatment in large vessel occlusion (LVO). We have analyzed our initial experience of MT of 137 patients in anterior circulation (AC) and posterior circulation (PC) LVO using Solitaire stent retriever device. METHODS: Retrospective cohort analysis of 112 AC and 25 PC acute ischemic strokes was done considering various baseline characteristics, risk factors, National Institute of Health Stroke Scale (NIHSS) change, revascularization rate, complications, and functional outcome at 3 months using modified Rankin score...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28903944/a-dual-role-for-the-class-iii-pi3k-vps34-in-platelet-production-and-thrombus-growth
#3
Colin Valet, Marie Levade, Gaëtan Chicanne, Benoit Bilanges, Cendrine Cabou, Julien Viaud, Marie-Pierre Gratacap, Frédérique Gaits-Iacovoni, Bart Vanhaesebroeck, Bernard Payrastre, Sonia Severin
To uncover the role of Vps34, the sole class III phosphoinositide 3-kinase, in megakaryocytes (MKs) and platelets, we created a mouse model with Vps34 deletion in the MK/platelet lineage (Pf4-Cre/Vps34(lox/lox)). Deletion of Vps34 in MKs led to the loss of its regulator protein Vps15, and was associated with microthrombocytopenia and platelet granule abnormalities. While Vps34 deficiency did not impact on MK polyploidisation or proplatelet formation, it dampened MK granule biogenesis and directional migration towards an SDF1α gradient, leading to ectopic platelet release within the bone marrow...
September 13, 2017: Blood
https://www.readbyqxmd.com/read/28902821/-outcomes-of-open-endovascular-operations-on-the-internal-carotid-artery-in-acute-stage-of-ischaemic-stroke
#4
A I Khripun, A D Priamikov, A B Mironkov, I N Tiurin, S A Asratian, V S Suriakhin, O V Simonov, O A Sazhina, V P Mikhaĭlenko
INTRODUCTION: The authors share their experience in diagnosis and treatment of patients with acute ischaemic stroke. PATIENTS AND METHODS: The study included a total of 33 patients. Of these, 20 patients (Study Group) were operated on at terms ranging from 2 to 7 days after onset of acute cerebral circulatory impairment. The Control Group was composed of 13 patients with ischaemic stroke, having refused surgical prevention of recurrent stroke. Both groups were matched by age, gender, level of neurological deficiency and size of cerebral ischaemic foci...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/28902813/-surgical-decision-making-during-treatment-of-a-patient-with-multifocal-atherosclerosis-based-on-intraoperative-epiaortic-scanning
#5
A V Marchenko, P A Mialiuk, A S Vronskiĭ
The article deals with a clinical case report regarding surgical management of a patient presenting with multifocal atherosclerosis. Taking into consideration critical stenoses of the anterior interventricular artery (80%) and circumflex artery (80%), as well as subocclusion of the left internal carotid artery and stenosis of the right internal carotid artery (60%), there were high risks for intraoperative cerebral circulation impairment. It was decided to perform a two-stage operation on the coronary and carotid beds...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/28899893/acute-in-vivo-analysis-of-atp-release-in-rat-kidneys-in-response-to-changes-of-renal-perfusion-pressure
#6
Oleg Palygin, Louise C Evans, Allen W Cowley, Alexander Staruschenko
BACKGROUND: ATP and derivatives are recognized to be essential agents of paracrine signaling. It was reported that ATP is an important regulator of the pressure-natriuresis mechanism. Information on the sources of ATP, the mechanisms of its release, and its relationship to blood pressure has been limited by the inability to precisely measure dynamic changes in intrarenal ATP levels in vivo. METHODS AND RESULTS: Newly developed amperometric biosensors were used to assess alterations in cortical ATP concentrations in response to changes in renal perfusion pressure (RPP) in anesthetized Sprague-Dawley rats...
September 12, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28895453/extracranial-internal-carotid-artery-vasospasm-during-thrombectomy
#7
Isamu Miura, Akitsugu Kawashima, Masataka Hayashi, Akane Tanda, Tomomi Ishikawa, Takakazu Kawamata
The use of a stent retriever increases the risk of intracranial vasospasm. Here, we report the case of a man who developed severe vasospasm in a long segment of the extracranial internal carotid artery after mechanical irritation by a stent retriever inserted for the treatment of acute cerebral ischemia. A 47-year-old right-handed man presented with sudden-onset right-sided weakness and difficulty speaking. The patient's National Institutes of Health Stroke Scale score was 6 and he had an Alberta Stroke Program Early Computed Tomography Score of 9...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28893576/isolated-internal-carotid-artery-thrombus-and-cerebral-infarction-in-a-patient-with-necrotizing-pancreatitis-case-report
#8
Daniel R Ludwig, Matthew J Austin, Adam N Wallace, Mudassar Kamran, Akash P Kansagra, Joshua W Osbun, DeWitte T Cross, Christopher J Moran
Isolated internal carotid artery (ICA) thrombus in the absence of underlying atherosclerotic disease is a rare entity. We report a case of a patient presenting with right arm weakness, slurred speech, and altered mental status in the setting of acute on chronic pancreatitis. The patient was found to have scattered left cerebral hemisphere cortical infarctions, and catheter angiography confirmed the presence of intraluminal left ICA thrombus, with no evidence of atherosclerotic disease in the cervical or intracranial vasculature...
September 8, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28893252/association-between-carotid-plaque-characteristics-and-acute-cerebral-infarction-determined-by-mri-in-patients-with-type-2-diabetes-mellitus
#9
Beibei Sun, Xiao Li, Xiaosheng Liu, Xiaoqian Ge, Qing Lu, Xihai Zhao, Jun Pu, Jianrong Xu, Huilin Zhao
BACKGROUND: Type 2 diabetes mellitus (T2DM) might aggravate the carotid plaque vulnerability, and increase the risk for ischemic stroke. Few studies reported the acute stroke subtype with carotid plaque characteristics in T2DM patients. This study aimed to investigate the association between carotid plaque characteristics and acute cerebral infarct (ACI) lesion features determined by MRI in T2DM patients. METHODS: Patients with acute cerebrovascular syndrome in internal carotid artery territory were recruited...
September 11, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28888346/the-safety-of-carotid-artery-stenting-for-patients-in-the-acute-poststroke-phase
#10
Masaru Seguchi, Masunari Shibata, Yu Sato, Kota Maekawa, Yotaro Kitano, Takanori Sano, Kazuto Kobayashi, Shigetoshi Shimizu, Fumitaka Miya
BACKGROUND: The efficacy of carotid artery stenting (CAS) for patients in the acute poststroke phase has not been established. We investigated the outcome of CAS for patients with symptomatic internal carotid artery (ICA) stenosis in the acute poststroke phase. METHODS: We performed a retrospective analysis of all patients who underwent CAS for symptomatic ICA stenosis in our institution. Patients in whom the time interval between neurological deterioration and the CAS procedure was less than 3 days were included in the early group, and the other patients were included in the delayed group...
September 6, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28887238/emergent-carotid-stent-removal-after-carotid-stent-thrombosis-surgical-technique
#11
Konstantinos G Moulakakis, Andreas Lazaris
OBJECTIVE: To present the technique for emergent removal of the thrombosed stent in acute carotid stent thrombosis in patients undergoing carotid artery angioplasty-stenting (CAS) BACKGROUND: Acute carotid stent thrombosis in patients undergoing CAS is a relatively rare and potentially devastating complication influencing significantly the quality of life. With the increasing use of stenting in clinical practice, it is expected to represent a more often encountered complication for physicians performing CAS...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28885101/association-between-the-maximal-distance-of-atrial-septal-protrusion-and-cryptogenic-stroke
#12
Keisuke Tokunaga, Masahiro Yasaka, Takahiro Kuwashiro, Seiji Gotoh, Asako Nakamura, Go Takaguchi, Tetsuro Ago, Masahiro Kamouchi, Takanari Kitazono, Yasushi Okada
Background and purpose Previous studies have suggested that atrial septal aneurysm is a potential risk factor for cerebral embolism. However, the association between the level of atrial septal protrusion and cerebral embolism is still unclear. The purpose of the present study was to assess the association between the maximal distance of atrial septal protrusion and cryptogenic stroke. Methods A total of 588 consecutive acute ischemic stroke patients (70 ± 11 (mean ± SD) years, 401 men) who underwent transesophageal echocardiography were enrolled...
December 20, 2016: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28882820/high-levels-of-un-switched-memory-b-cells-are-associated-with-better-outcome-in-patients-with-advanced-atherosclerotic-disease
#13
John A L Meeuwsen, Amerik van Duijvenvoorde, Aisha Gohar, Maria O Kozma, Sander M van de Weg, Crystel M Gijsberts, Saskia Haitjema, Harry Björkbacka, Gunilla N Fredrikson, Gert J de Borst, Hester M den Ruijter, Gerard Pasterkamp, Christoph J Binder, Imo E Hoefer, Saskia C A de Jager
BACKGROUND: Atherosclerosis is an inflammatory lipid disorder and the main underlying pathology of acute ischemic events. Despite a vast amount of data from murine atherosclerosis models, evidence of B-cell involvement in human atherosclerotic disease is limited. We therefore investigated the association of circulating B-cell subtypes with the occurrence of secondary cardiovascular events in advanced atherosclerotic disease. METHODS AND RESULTS: This cohort study consists of 168 patients who were included in the Athero-Express biobank between 2009 and 2011...
September 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28882090/stenosis-length-of-middle-cerebral-artery-and-branch-atheromatous-disease-associated-infarct
#14
Jian Wang, Yujie Wang, Zijia Chai, Yue Xin, Jialiang Wang, Jianting Qiu
ABSRACT Background: We analyzed the relationship between the characteristics of branch atheromatous disease associated infarct (BAI) and stenosis length (SL) of relevant middle cerebral artery (MCA) M1 segment. METHODS: 95 patients with BAI were recruited from 1024 consecutive acute ischemic stroke patients. Among them, 59 patients (62.11%) had concurrent relative stenosis of MCA M1 segment. The neurologic deficit severity at admission was assessed by NIHSS and the infarct size by infarct lesion thickness and maximum diameter...
September 8, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28881821/radial-artery-intima-media-thickness-regresses-after-secondary-prevention-interventions-in-patients-post-acute-coronary-syndrome-and-is-associated-with-cardiac-and-kidney-biomarkers
#15
Damilola D Adingupu, Helena U Westergren, Santosh Dahgam, Ann-Cathrine Jönsson-Rylander, Juuso Blomster, Per Albertsson, Elmir Omerovic, Sara Svedlund, Li-Ming Gan
BACKGROUND: Radial artery intima-media thickness (rIMT) measured by ultra-high-resolution ultrasound is associated with increased cardiovascular risk and predicts outcomes. We performed non-invasive high-resolution ultrasound of the radial artery to investigate vascular changes in subjects presenting with acute coronary syndrome (ACS) and who had undergone percutaneous coronary intervention (PCI). PURPOSE: In the present work, we aimed to follow rIMT change over time post-acute coronary syndrome as a tool to monitor potential response to intensified medical therapy...
August 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28878215/respiratory-oscillations-in-alveolar-oxygen-tension-measured-in-arterial-blood
#16
Federico Formenti, Nikhil Bommakanti, Rongsheng Chen, John N Cronin, Hanne McPeak, Delphine Holopherne-Doran, Goran Hedenstierna, Clive E W Hahn, Anders Larsson, Andrew D Farmery
Arterial oxygen partial pressure can increase during inspiration and decrease during expiration in the presence of a variable shunt fraction, such as with cyclical atelectasis, but it is generally presumed to remain constant within a respiratory cycle in the healthy lung. We measured arterial oxygen partial pressure continuously with a fast intra-vascular sensor in the carotid artery of anaesthetized, mechanically ventilated pigs, without lung injury. Here we demonstrate that arterial oxygen partial pressure shows respiratory oscillations in the uninjured pig lung, in the absence of cyclical atelectasis (as determined with dynamic computed tomography), with oscillation amplitudes that exceeded 50 mmHg, depending on the conditions of mechanical ventilation...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28868317/aorto-cutaneous-fistula-and-false-aneurysm-of-the-ascending-aorta-five-years-after-its-prosthetic-replacement-for-stanford-type-a-acute-aortic-dissection
#17
Pierre Demondion, Dorian Verscheure, Pascal Leprince
Aorto-cutaneous fistula and false aneurysm of the ascending aorta in patients who previously underwent Stanford Type A acute aortic dissection are rare and severe complications. Surgical correction remains a demanding challenge. In a case of false aneurysm rupture during redo sternotomy, selective cannulation of the right axillary and left carotid arteries allowed an efficient method of cerebral perfusion.
April 2017: Aorta (Stamford, Conn.)
https://www.readbyqxmd.com/read/28867523/drip-and-ship-thrombolytic-therapy-for-acute-ischemic-stroke
#18
Ichiro Deguchi, Satoko Mizuno, Shinya Kohyama, Norio Tanahashi, Masaki Takao
BACKGROUND: Neuroendovascular therapy is a common treatment for patients with acute ischemic stroke of the anterior circulation who fail to respond to recombinant tissue plasminogen activator. However, although most hospitals can provide recombinant tissue plasminogen activator therapy, many cannot perform neuroendovascular therapy. Thus, use of a drip-and-ship treatment-liaison system allowing recombinant tissue plasminogen activator-treated patients to be transferred to facilities offering neuroendovascular therapy is important...
August 31, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28867380/homemade-fenestrated-stent-graft-for-thoracic-endovascular-aortic-repair-of-zone-2-aortic-lesions
#19
Ludovic Canaud, Kiyofumi Morishita, Thomas Gandet, Julien Sfeir, Sebastien Bommart, Pierre Alric, Marcello Mandelli
OBJECTIVE: The aim of this retrospective analysis was to evaluate the outcomes of homemade fenestrated stent-grafts for thoracic endovascular aortic repair of zone 2 aortic lesions. METHODS: From November 2013 to January 2017, 24 patients underwent thoracic endovascular aortic repair with left subclavian artery revascularization using a homemade fenestrated stent-graft to preserve the patency of the left subclavian artery. Elective cases accounted for 54% (n = 13) of the sample...
August 5, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28864597/parvovirus-b19-infection-in-children-with-arterial-ischemic-stroke
#20
Heather J Fullerton, Jorge M Luna, Max Wintermark, Nancy K Hills, Rafal Tokarz, Ying Li, Carol Glaser, Gabrielle A DeVeber, W Ian Lipkin, Mitchell S V Elkind
BACKGROUND AND PURPOSE: Case-control studies suggest that acute infection transiently increases the risk of childhood arterial ischemic stroke. We hypothesized that an unbiased pathogen discovery approach utilizing MassTag-polymerase chain reaction would identify pathogens in the blood of childhood arterial ischemic stroke cases. METHODS: The multicenter international VIPS study (Vascular Effects of Infection in Pediatric Stroke) enrolled arterial ischemic stroke cases, and stroke-free controls, aged 29 days through 18 years...
September 1, 2017: Stroke; a Journal of Cerebral Circulation
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