TY - JOUR. T1 - Subcortical arteriosclerotic encephalopathy. T2 - Brain stem findings with MR imaging. AU - Salomon, A.. AU - Yeates, A. E.. AU - Burger, P. C.. AU - Heinz, E. R.. PY - 1987. Y1 - 1987. N2 - Magnetic resonance images of 44 patients who had varying degrees of supratentorial signal abnormalities compatible with subcortical arteriosclerotic encephalopathy (SAE) were reviewed for posterior fossa findings. Brain stem lesions frequently accompanied supratentorial SAE and were seen as multiple, fairly symmetric areas of poorly defined, increased signal intensity on axial T2-weighted images. Involvement was generally confined to the central portions of the mid and upper pons. The typical appearance of brain stem involvement by SAE and its probable pathogenesis are reviewed.. AB - Magnetic resonance images of 44 patients who had varying degrees of supratentorial signal abnormalities compatible with subcortical arteriosclerotic encephalopathy (SAE) were reviewed for posterior fossa ...
Although blood lipids and lipoproteins are strongly related to coronary atherosclerosis, their association with cerebrovascular atherosclerosis is less clear. A review of more than 20 publications in which a relation was sought between plasma lipid and lipoprotein concentrations and cerebrovascular atherosclerosis leads to the general conclusion that such a relation exists and that it is stronger in older than in younger individuals. A relation was found between blood lipids and/or lipoproteins and the extent and/or severity of cerebrovascular atherosclerosis in all but three of 26 reviewed studies. However, the specific nature of the relation is obscure because the various studies cannot easily be compared with one another. Interstudy variations in lipoprotein fraction analyzed, methodology for the analysis of lipids and lipoproteins, arterial segment examined, population sampled, control selection in case-control studies, statistical analytic approach taken, and methodology for the assessment ...
Blood vessels atherosclerosis is a dangerous and widespread complication of increased cholesterol level. At emergence of its first symptoms it is necessary to begin full treatment immediately. Perhaps, a surgical intervention will be required.. Vessels intima of brain is damaged. Round sclerotic plaques the connecting tissue expands, on vessel walls calcium salts accumulate that leads to narrowing of clearance which can "be overgrown" completely.. Cerebral atherosclerosis is shown by changes in mentality of person. Working capacity drops, fatigability grows. Hyper excitability is a result of disease. Cerebral atherosclerosis is a main reason of sleeplessness in the night and daytime sleepiness.. At slow progress of cerebral atherosclerosis giddiness accrues, there are exhausting headaches, sweating and face reddening, flicker of points before eyes, tinnitus, gait with slight lameness. Sometimes the absurdity features of character become aggravated: diligence turns into greediness, accuracy turns ...
See related article, pages 1766-1769. Symptomatic intracranial atherosclerotic disease carries a significant risk for future ipsilateral ischemic events regardless of the use of warfarin or aspirin.1 Patients presenting with a lesion that is ,70% appear to be most vulnerable with a 1-year risk of 23% for a subsequent ipsilateral event.2 Moreover, poor control of blood pressure and cholesterol appear to be associated with a higher risk of a subsequent stroke. At 1-year follow-up in the WASID study, 58% of patients were still found to have a LDL cholesterol of ,100 mg/dL despite 91% of patients being on lipid-lowering therapy, and 50% of patients were found to have a systolic blood pressure ,140 mm Hg.3 Recent guidelines suggest that patients at high risk for vascular disease may benefit from LDL cholesterol levels below 70 mg/dL,4 which was achieved in only 12% of patients in the WASID study at 1-year follow-up.3 This has highlighted the importance of vascular neurologists being more aggressive ...
Intracranial atherosclerotic disease is a high-risk cause of stroke that is potentially treatable. The Northern Manhattan Stroke Study (27) found a 5.9% adjusted risk of recurrent stroke at 30 days in 57 patients relative to a nonatherosclerotic stroke group. Stroke rates in patients with symptomatic intracranial stenoses who are receiving medical therapy may be as high as 10%-24% per year (28). The risk of stroke and death appears to increase early and dramatically for patients whose medical therapy is not successful. Although the first treatment choice for patients with intracranial atherosclerotic stenoses is medical therapy, adjunctive stroke-prevention therapies should be given. Because the angioplastic microballoon catheter, which can be used in intracranial vessels, emerged in the field of neuroendovascular treatment, reports of PTA for intracranial atherosclerotic stenoses have shown an increasing trend. Several investigators reported the efficacy of PTA for intracranial atherosclerotic ...
Cerebral atherosclerosis is a type of atherosclerosis where build-up of plaque in the blood vessels of the brain occurs. Some of the main components of the plaques are connective tissue, extracellular matrix, including collagen, proteoglycans, fibronectin, and elastic fibers; crystalline cholesterol, cholesteryl esters, and phospholipids; cells such as monocyte derived macrophages, T-lymphocytes, and smooth muscle cells. The plaque that builds up can lead to further complications such as stroke, as the plaque disrupts blood flow within the intracranial arterioles. This causes the downstream sections of the brain that would normally be supplied by the blocked artery to suffer from ischemia. Diagnosis of the disease is normally done through imaging technology such as angiograms or magnetic resonance imaging. The risk of cerebral atherosclerosis and its associated diseases appears to increase with increasing age; however there are numerous factors that can be controlled in attempt to lessen risk. ...
Evidence-based recommendations endovascular stent insertion for treating intracranial atherosclerotic disease (ICAD/intracranial stenosis)
Objective: While data on the relationship between fatty acid (FA) composition and the risk for total stroke have accumulated, the association between FA composition and the risk for intracranial atherosclerotic stenosis (ICAS) has never been studied. We compared plasma phospholipid FA composition between non-stroke control and ischemic stroke in Korean population, to discern the FA that distinguishes ICAS from total ischemic stroke patients. Methods: Non-stroke controls (n = 215) and stroke patients (no cerebral atherosclerotic stenosis, NCAS: n = 144 and ICAS: n = 104) were finally included in the analysis. Plasma phospholipid FA compositions were analyzed. Results: Age, coexistence of hypertension/diabetes were significantly different among the groups. Phospholipid FA compositions were significantly different between non-stroke control and ischemic stroke patients, and interestingly, between NCAS and ICAS in stroke patients. Pattern analysis showed that docosahexaenoic acid (DHA) and ...
Blood vessels atherosclerosis is a dangerous and widespread complication of increased cholesterol level. At emergence of its first symptoms it is necessary to begin full treatment immediately. Perhaps, a surgical intervention will be required.. Vessels intima of brain is damaged. Round sclerotic plaques the connecting tissue expands, on vessel walls calcium salts accumulate that leads to narrowing of clearance which can "be overgrown" completely.. Cerebral atherosclerosis is shown by changes in mentality of person. Working capacity drops, fatigability grows. Hyper excitability is a result of disease. Cerebral atherosclerosis is a main reason of sleeplessness in the night and daytime sleepiness.. At slow progress of cerebral atherosclerosis giddiness accrues, there are exhausting headaches, sweating and face reddening, flicker of points before eyes, tinnitus, gait with slight lameness. Sometimes the absurdity features of character become aggravated: diligence turns into greediness, accuracy turns ...
Background and Purpose The purpose of this study was to assess the influence of race, sex, and other risk factors on the location of atherosclerotic occlusive lesions in cerebral vessels. Previous angiographic studies of patients with stroke or transient ischemic attack TIA suggest that extracranial atherosclerosis is more common in whites and...
Have a presumed stroke etiology: Lacunar or small vessel thrombosis, extra-cranial or intracranial atherosclerotic stenosis or dissection, arteriopathy or vasculitis, hypercoagulable state, aortic arch plaque with or without mobile elements, or evidence of a low-risk cardiac source (e.g., patent foramen ovale with or without atrial septal aneurysm and with or without evidence of venous thromboembolic source ...
Cerebral arteriosclerosis develops most often between the ages of 50-60 years.Mental disorders may be of psychotic and non-psychotic character.. In the early stages of the disease there is neurosis symptoms: irritability, fatigue, anxiety, and sleep disorders.There is a kind of sharpening of personal characteristics - thrift becomes miserliness, suspiciousness in suspicion, etc. A characteristic feature is the progressive loss of memory, which leads to a decrease in efficiency...Mostly memory impairment on current events.Patients forget to new names, names, phone numbers, recently read, seen.. When malignant course of mental disorders can sometimes reach a degree of Korsakovs syndrome.In addition, a marked emotional lability - patients are worried over nothing, move easily from laughter to tears, and vice versa, very touchy.Characteristic "symptoms flicker", ie. E. The presence of fluctuations in the severity of various symptoms of the disease.Progressive impaired ...
Ischemic stroke and intracranial artery disease demonstrate different characteristics depending on the race and region of the patient population. Intracranial atherosclerosis causes ,10% of ischemic strokes in white North American patients [13,14], but causes 50%-60% of strokes in Asian populations [15,16]. Hispanic and black patients demonstrate a relative rate of intracranial atherosclerosis-related strokes that is five times greater than that of white patients [17]. Hence, the most common cause of ischemic stroke worldwide could be intracranial atherosclerosis [16]. Atherosclerosis results from a cascade of endothelial dysfunction processes, infiltration of modified lipids into the intima, and vascular wall inflammation or remodeling [18]. On HR-MRI, atherosclerotic plaques, lipid cores, fibrous components, hemorrhage, and calcium are the most important components [6]. In the cervical carotid arteries, it may be easier to characterize the vascular wall, to differentiate these components, and ...
Atherosclerosis is a systemic disease that has been shown to cause various cardiovascular diseases and stroke. In particular, atherosclerotic plaque has been associated with many acute clinical complications. Cerebral infarction in the territory of the carotid arteries accounts for most strokes in Western countries and approximately 20% of patients have significant atherosclerotic narrowing at the origin of the internal carotid artery.1,2 Moreover, approximately 10% of the occurrence of ischemic stroke in the United States is related to intracranial atherosclerotic disease.3,4 There is an immediate need to assess atherosclerosis in vivo to study the disease.2,5-8. Advances in imaging technology have made it possible to observe the 3D geometric changes of blood vessels and evaluate the degree of vessel narrowing in patients by using techniques such as MR imaging and CT.6,7,9,10 Researchers have also presented various techniques and computational models to assess irregular vascular geometry and to ...
Preliminary evidence indicates that intracranial atherosclerosis may predict incident cerebrovascular events and central atrophy. Age induced changes on cerebral tissue in adulthood is witnessed as atrophy and well know ischemic changes on imaging studies. There is no consensus at this time what constitutes normal, age induced atrophy and pathologic atrophy on imaging studies. The same challenge is also encountered for ischemic cerebral parenchymal change.. Until recently there have been several important limitations in this research 1) Measurement of cerebral tissue loss and amount of ischemic insult was based on a qualitative grading (2) There was no cognitive testing. With Advancements in software technology that have now allowed for measurements of CSF and brain volumes in reliable and reproducible ways and the neuroradiologist having access to the subjects Neurological Cognitive Testing Scores, this study will objectively measure MRI findings and correlate them with the level of cognitive ...
Leistungen:. Acandis GmbH & Co. KG is a medical device company founded in 2006 with its headquarters and training center in Pforzheim, Germany. Acandis develops, manufactures and markets medical devices used in the treatment of cerebral vascular diseases. Our products are used by interventional neuroradiologists and neurosurgeons. The products are developed primarily to treat cerebral aneurysm responsible for hemorrhagic stroke, intracranial atherosclerosis and thrombosis, which may lead to ischemic stroke. Hemorrhagic and ischemic stroke are both significant causes of death and disability worldwide.. ...
Patients at a high risk for a second stroke who received intensive medical treatment had fewer strokes and deaths than patients who received a brain stent in addition to the medical treatment, a large nationwide clinical trial has shown. The investigators published the results in the online first edition of the New England Journal of Medicine [1]. The National Institute of Neurological Disorders and Stroke (NINDS), part of the National Institutes of Health, funded the trial. The medical regimen included daily blood-thinning medications and aggressive control of blood pressure and cholesterol.. New enrollment in the study was stopped in April because early data showed significantly more strokes and deaths occurred among the stented patients at the 30-day mark compared to the group who received the medical management alone.. ...
WASHINGTON -- An FDA advisory committee has indicated that there is insufficient evidence to say that the Wingspan intracranial stent has a long-term benefit that outweighs the devices risks.
Stryker ($SYK) is facing a sobering FDA report that points to the companys Wingspan stent as being more damaging than helpful in some cases and of neutral benefit in others, according to a Bloomberg story.
Looking for online definition of Aspirin Versus Anticoagulants in Symptomatic Intracranial Stenosis in the Medical Dictionary? Aspirin Versus Anticoagulants in Symptomatic Intracranial Stenosis explanation free. What is Aspirin Versus Anticoagulants in Symptomatic Intracranial Stenosis? Meaning of Aspirin Versus Anticoagulants in Symptomatic Intracranial Stenosis medical term. What does Aspirin Versus Anticoagulants in Symptomatic Intracranial Stenosis mean?
Background: Atherosclerotic middle cerebral artery (MCA) disease may produce subcortical infarction either in the upper part (corona radiata, CR) or in the lower area (internal capsule, IC) of the pyramidal tract. The study aimed to see whether the location of MCA stenosis (proximal vs distal) determines the location of subcortical infarction.. Methods: 62 consecutive patients who developed an acute (,72 h) infarction either on the CR or IC confirmed by diffusion-weighted MRI due to corresponding focal MCA M1 stenosis assessed by MR angiography were studied. The distance between the MCA origin and the centre of stenotic portion (S) and that between the MCA origin and its bifurcation site (M) were measured. Based on the S/M ratio, stenotic lesions were divided into "proximal and "distal. The relationship between the location of arterial stenosis and the location of infarcts was analysed.. Results: Thirteen of 31 patients (41.9%) with proximal M1 stenosis had IC lesions, while 26 (83.9%) of 31 ...
We aimed to define the relationship between cerebral atherosclerosis and stroke after coronary artery bypass grafting (CABG). Although cerebral atherosclerosis may play a crucial role in the advent of post-CABG stroke, only extracranial carotid
January 30, 2018-Stryker announced that results from WEAVE, the postmarket surveillance study of the companys Wingspan stent system, were presented at the ISC 2018: the International Stroke Conference held January 24-26 in Los Angeles, California.. According to the company, the findings provide compelling evidence that more patients with intracranial atherosclerotic disease (ICAD) may benefit from endovascular treatment with the Wingspan stent system.. Wingspan is a self-expanding stent and delivery system intended for use in the treatment of ICAD. It includes the over-the-wire Gateway percutaneous transluminal angioplasty balloon catheter that predilates the lesion before insertion and deployment of the Wingspan stent.. The WEAVE study was mandated by the US Food and Drug Administration, which approved the Wingspan stent system under a humanitarian device exemption in 2005. Wingspan also received European CE Mark approval in 2005.. The company-sponsored, multicenter, prospective WEAVE study is ...
Epidemiology and risk factors. 1 Anatomy of intracranial arteries.. David S Liebeskind and Louis R Caplan.. 2 Pathologic characteristics.. Xiang-Yan Chen and Mark Fisher.. 3 Epidemiology.. Philip Gorelick, Jinghao Han, Yining Huang and Ka Sing Wong.. 4 Risk factors.. Kazuo Minematsu, Oh Young Bang and Toshiyuki Uehara.. Stroke mechanism and clinical consequence5 Stroke mechanisms.. Ka Sing Wong, Louis R Caplan and Jong S Kim.. 6 Anterior circulation disorders.. Jong S Kim.. 7 Posterior circulation disorders.. Louis R Caplan, Pierre Amarenco and Jong S Kim.. 8 Cognitive dysfunction, dementia and emotional disturbances.. Jae-Hong Lee, Alex E Roher, Thomas G Beach and Jong S Kim.. 9 Natural course and prognosis.. Juan F Arenillas, Louis R Caplan and Ka Sing Wong.. Diagnostic imaging studies10 Vascular imaging.. Edward Feldman, Harry J Cloft, Mai Nguyen-Huynh and Avean McLaughlin.. 11 Application of magnetic resonance imaging.. Dong-Wha Kang and Jong S Kim.. 12 Transcranial doppler.. Qing Hao, Ka ...
Results Overall, the technical success rate was 100% (44/44). Post-stenting residual stenosis ranged from 0% to 40% (mean 15.00±12.94%). The overall 30-day rate of procedure-related complications was 9.09% (4/44). The incidence of recurrent ischemic events related to the territory artery was 4.55% during a mean clinical follow-up period of 25.5 months. Five patients (11.36%) developed in-stent restenosis during a mean angiographic follow-up period of 9.3 months. ...
Numerous studies have been conducted in France and Germany, where it was shown that Ginkgo is effective in the treatment of dementia, depression, menopausal, dizziness, vascular disease, Alzheimers disease, short term memory loss, peripheral vascular disease, acrocyanosis, cerebral atherosclerosis, cochlear deafness pile (physical and mental weakness due to age), and others ...
Stroke Symposium: Intracranial Artery Disease (Chairs: Kurt Niederkorn, Thomas Gattringer). Kurt Niederkorn (Graz): Overview and Medical Management of Intracranial Atherosclerosis. Hannes Deutschmann (Graz): Neuroradiological Diagnosis and Endovascular Treatment of Intracranial Artery Disease. Markus Kneihsl (Graz): Neurosonography in the Diagnosis and Management of Intracranial Vascular Disease. Thomas Gattringer (Graz): Cerebral Vasculitis and Differential ...
The Journal of Stroke (JoS) provides stroke clinicians and researchers with peer-reviewed articles on clinical and basic investigation of cerebral circulation and associated diseases to enhance patient management, education, clinical or experimental research, and professionalism. The jour-nal will consider submissions in areas including, but not limited to, the following: pathophysiology, risk factors, symptomatology, imaging, treat¬ment, and rehabilitation of stroke. We have a particular interest in strokes in Asian populations as they have features distinct from strokes in the other part of the world. Clinical researches on intracranial atherosclerosis, small vessel diseases, hemorrhagic strokes, and relevant basic research¬es are welcome, as are issues in epidemiology, public education, and clinical practice guidelines in Asian countries.
The Psychiatry Investigation (Psychiatry Investig) provides stroke clinicians and researchers with peer-reviewed articles on clinical and basic investigation of cerebral circulation and associated diseases to enhance patient management, education, clinical or experimental research, and professionalism. The jour-nal will consider submissions in areas including, but not limited to, the following: pathophysiology, risk factors, symptomatology, imaging, treat¬ment, and rehabilitation of stroke. We have a particular interest in strokes in Asian populations as they have features distinct from strokes in the other part of the world. Clinical researches on intracranial atherosclerosis, small vessel diseases, hemorrhagic strokes, and relevant basic research¬es are welcome, as are issues in epidemiology, public education, and clinical practice guidelines in Asian countries.
The Psychiatry Investigation (Psychiatry Investig) provides stroke clinicians and researchers with peer-reviewed articles on clinical and basic investigation of cerebral circulation and associated diseases to enhance patient management, education, clinical or experimental research, and professionalism. The jour-nal will consider submissions in areas including, but not limited to, the following: pathophysiology, risk factors, symptomatology, imaging, treat¬ment, and rehabilitation of stroke. We have a particular interest in strokes in Asian populations as they have features distinct from strokes in the other part of the world. Clinical researches on intracranial atherosclerosis, small vessel diseases, hemorrhagic strokes, and relevant basic research¬es are welcome, as are issues in epidemiology, public education, and clinical practice guidelines in Asian countries.
This research study is a Food and Drug Administration (FDA) mandated post market surveillance study of the Wingspan® Stent System, also known as the WEAVE™ Trial. The purpose of this trial is to fulfill a FDA requirement to evaluate the rate of stroke and/or death within 72 hours of the procedure, in patients who have a Wingspan Stent implanted in accordance with the Indications for Use ...
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This study showed that selective neuronal damage manifested as a decrease in the BZRs in the non-infarcted cerebral cortex is associated with poor performance on the WCST in the non-disabled patients with unilateral atherosclerotic ICA or MCA disease and no cortical infarction. The BZR index of the ACA territory in the hemisphere affected by arterial disease was significantly higher in WCST-abnormal (low categories achieved for their age) patients than in WCST-normal patients, whereas the BZR index of the MCA territory was significantly different between the two groups when patients with left arterial disease were separately analysed.. This study included ICA and MCA diseases, which may have different impacts on CBF in the ACA territory. Twelve of the 17 studied patients with MCA disease had occlusion of the MCA, in which blood flowing through the ACA is redistributed via the leptomeningeal vessels to compensate for the reduced flow in the MCA, resulting in reduced flow in the ACA territory.30 ...
Sigma-Aldrich offers abstracts and full-text articles by [Soonchan Park, Jae-Hyuk Kim, Jae Kyun Kwak, Hye Jin Baek, Bo Hyun Kim, Dong-Geun Lee, Deok Hee Lee, Jong Sung Kim, Dae Chul Suh].
Intracranial stents 2019: In general, intracranial stenting is still performed in rare cases, but only when other forms of medical therapy have failed.
What is Atherosclerosis? - Symptoms of Atherosclerosis - Brain Circulation and Stroke - Atherosclerotic Stroke Prevention - Prognosis
Binswangers disease. Coloured axial computed tomography (CT) scan of a brain with Binswangers disease. The front of the brain is at top in this view from below. The progression of this degenerative disease has caused atrophy in both halves of the brain, seen as the abnormal gaps appearing in the brain tissue. The ventricles (centre, orange) have also been affected and are dilated from their normal size. The disease, also called Binswangers dementia, involves disruption of the brains blood supply, which starves areas of the brain of oxygen, resulting in the death of nerve cells. Symptoms include depression, muscle rigidity, difficulties walking and urinary incontinence. There is no cure for the condition. - Stock Image C001/7913
Binswangers disease, also known as subcortical leukoencephalopathy, is a form of small vessel vascular dementia caused by damage to the white brain matter. White matter atrophy can be caused by many circumstances including chronic hypertension as well as old age. This disease is characterized by loss of memory and intellectual function and by changes in mood. These changes encompass what are known as executive functions of the brain. It usually presents between 54 and 66 years of age, and the first symptoms are usually mental deterioration or stroke. It was described by Otto Binswanger in 1894, and Alois Alzheimer first used the phrase "Binswangers disease" in 1902. However, Olszewski is credited with much of the modern-day investigation of this disease which began in 1962. Symptoms include mental deterioration, language disorder, transient ischemic attack, muscle ataxia, and impaired movements including change of walk, slowness of movements, and change in posture. These symptoms usually ...
Atherosclerotic stenosis of common and internal carotid arteries is a well-recognized risk factor for ischemic stroke, and revascularization has been proven to be the main tool of prevention, particularly for patients with stenosis-related symptoms.
by Derdeyn, Colin P and Chimowitz, Marc I and Lynn, Michael J and Fiorella, David and Turan, Tanya N and Janis, L Scott and Montgomery, Jean and Nizam, Azhar and Lane, Bethany F and Lutsep, Helmi L and Barnwell, Stanley L and Waters, Michael F and Hoh, Brian L and Hourihane, J Maurice and Levy, Elad I and Alexandrov, Andrei V and Harrigan, Mark R and Chiu, David and Klucznik, Richard P and Clark, Joni M and McDougall, Cameron G and Johnson, Mark D and Pride, G Lee and Lynch, John R and Zaidat, Osama O and Rumboldt, Zoran and Cloft, Harry J and for the Stenting and Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis Trial Investigators and Stenting Aggressive Med Management and Stenting and Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis Trial Investigators ...
Description and Similar Species: Wingspan 54-60mm. Sexes similar. Has a slow fluttering flight and the large clear areas on the wings can make it hard to spot in the dark shaded forest where it flies. ...
Southern Pintail 35-45 cm, male 430-502 g, female 400-500 g#R, wingspan 65-70 cm. Compared to A. acuta (with which previously considered to be conspecific, see Taxonomy comm
Insects with wingspans of more than two feet ruled the skies until 150 million years ago, when predatory birds evolved into skilled flying bug-zappers, according to a study.
A giant mosquito with a wingspan of more than 4 inches has been found in China. The super-sized insect belongs to the Holorusa mikado species, the largest...
Ankle-to-arm blood pressure index ≤ 0.9 was associated with increased mortality in hypertensive adults. Prevailing wisdom argues that persons at greatest risk for cardiovascular disease should be identified and managed more aggressively. Patients with peripheral arterial disease, just like those with transient ischemic attacks and carotid stenoses, are vulnerable to myocardial infarction and to death from cardiovascular disease. Because the relation between smoking and peripheral arterial disease is particularly strong, it is attractive to hypothesize an association between peripheral arterial disease (or an appropriate marker) and mortality from all causes, coronary disease, and smoking-related cancers. AAI offers the most sensitive noninvasive method for detecting important atherosclerotic stenoses in large, lower-limb arteries. The Multicenter Study of Osteoporotic Fractures included a population of older white women, 6% of whom had an AAI of ≤ 0.9. The RR was 3.1 for all-cause mortality ...
The Stenting versus Aggressive Medical Management for Preventing Recurrent Stroke in Intracranial Stenosis (SAMMPRIS) study, is the first stroke prevention trial to compare intracranial stenting with medical therapy and incorporate intensive medical management to the study design. Patients in the study were ages 30 to 80 years old and had experienced a recent transient ischemic attack or another type of non-disabling stroke. All patients participated in a lifestyle modification program focused on quitting smoking, increasing exercise, and controlling diabetes and cholesterol ...
Although only known from a few fragmentary remains, much can be determined about this animal and its size, by scaling up other more complete azhdarchids such as Montanazhdarcho. Original estimates suggested this animal has a wingspan of 12-15 m, but more conservative recent estimates suggest it had a wingspan of 10-11 m [5]. Even at just 11 m wingspans, this animal would have been terrifying. As mentioned in a previous post, the palaeoecology of this region is interesting. Hatzegopteryx appears to be the largest carnivore and predator of the Late Cretaceous of Romania. This has lead people to suggest that Hatzegopteryx would have preyed on small dinosaurs, termed the terrestrial stalking hypothesis [6]. Islands limit the amount of resources available for animals, and typically result in island dwarfism. Pterosaurs, however, would not have had this restriction as they could have flown from island to island. Additional remains from Romania that are currently being described suggest that there ...
A new perspective on Pilates that will have you walking taller after your first session. See the profile of this fitness/yoga studio in Manhattan.
1. Scalability. As weve seen above, the reason this plane can run on solar power is because its light and it has a large wingspan. Could we ever get this to work on a more practical scale - could we build a solar-powered equivalent of a 747? No - because carrying more people would mean that youd have to increase the weight of the plane, and so youd need more power to fly. But the amount of power you can provide is limited by the solar panels on the wings, so you just wont be able to meet the demand. Replacing solar panels with more efficient panels wont help much either - that can buy you energy gains of up to a factor of 2 or so, and that isnt nearly sufficient to cope with the added weight.. 2. Speed. This is one of the biggest limiters - the Solar Impulse will fly across the US at something like 30 or 40 miles per hour. Planes are typically optimized to fly at the speed that minimizes fuel consumption. It turns out that the lighter the plane and the longer the wingspan, the slower this ...