Download or read book Cerebral Ischemia and Basic Mechanisms written by Alexander Hartmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, one of a series of monographs devoted to the problems of cerebral ischemia and related topics, we present the proceedings of an international conference on Cerebral Ischemia and Basic Mechanisms held in Bad Schachen/Lake Constance, Germany in June 1992. The enormous progress in research recently on the basic mechanisms associated with cerebral ischemia has provided greater insight into the pathophysiological mechanisms of reduced brain perfusion and decreased cerebral metabolism. The high technology instrumentation used to unravel the intricacies of cerebral blood flow and metabolism includes positron emission tomography and magnetic resonance imaging. A description of sophisticated neurophysiological techniques will give the reader insight into new models of reversible and irreversible tissue damage and changes at the molecular level have been described. The therapeutic approaches which have developed from this re search have been or will be used in clinical trials and will open new avenues in the treatment of stroke. The organizers of the meeting would like to thank the advisory board for its helpful suggestions and the Deutsche Forschungsgemeinschaft and other sponsors for their important support.
Download or read book Cerebral Ischemia written by Wolfgang Walz and published by Springer Science & Business Media. This book was released on 1999-03-25 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The human brain represents about 2% of the body weight, yet it accounts for approximately 20% of aerobic metabolism. This high dependency on energy-consuming processes is mainly caused by the active transport of ions, which is necessary to compensate for the transmembrane ion currents that are part ofthe complex signaling processes in the brain. Ninety-five percent ofthe brain's ATP is derived from mitochondrial oxidative phosphorylation. Since that organ' s storage capacity for oxygen is minimal, any interruption of oxygen delivery to brain cells willlead to changes in membrane excitability and, there fore, to disruption of neuronal signaling within seconds. It seems that mamma lian brain is especially vulnerable to such an interruption, since oxygen deprivation leads to activation of ion channel mechanisms in neurons that impair their communications. Thus, the function of the brain as a coordinator of vital homeostatic reflexes, and complex body reactions to external challenges, depends critically on the rate of oxygen delivery and oxygen consumption. Oxygen delivery depends on two variables described in the Fick relation ship: volume flow rate ofblood and the arterial oxygen content. A reduction in either of these two variables will have serious effects on vital brain func tions. Reduction of arterial blood flow to the brain can be caused by cardiac arrest, shock, carotid occlusion, Of hypotension (global ischemia). Oxygen content is progressively decreased in asphyxia (including drowning).
Download or read book Ischemic Stroke written by Chung Y. Hsu and published by Karger Medical and Scientific Publishers. This book was released on 1998 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: '... Provides an admirable review of current knowledge regarding experimental stroke research, and outlines the problems and some solutions in the clinical application of such knowledge.'
Download or read book Cerebral Blood Flow written by Michael Pinsky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cerebral Blood Flow: Quantifying Consciousness Although the heart may be the source of energy needed to generate blood flow,and other organs absolutely essential for normal living,the brain is the reason we are alive. The collected book chapters are aimed at addressing this most fundamental organ and its blood flow. These papers reflect detailed descriptions of similar topics presented over a two-day period as part of the 5th International Symposium on Applied Physiology of the Peripheral Circulation held in Pittsburgh, Pennsylvania, in June 2000. The symposium and this volume were organized into four distinct groupings that follow in a logical fashion. The initial papers focus on the basic unique physiology and pathophysiology of the cerebral circulation, including a historical reviewof the means to measure cerebral blood flow and its implications of the past 30 years. Dr. Walter D. Obrist was one of the original investigators to use radiolabeled markers to assess cerebral blood flow. His equations and initial studies form an impressive introduction to where we are now. As with much of the body's special organs, the brain too has many circulatory features unique to itself.These include the unique blood-brain barrier function ofthe endothelium, local neural regulation control, and intracranial pressure effects. These special issues,plus genetic factors that may predispose individuals to developing cere bral aneurysm, make up the initial section of the monograph.
Download or read book Mechanisms of Secondary Brain Damage written by A. Baethmann and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: A distinction between primary and secondary brain damage of vari ous origin, particularly in acute lesions, such as head injury and ische mia is not entirely new. The concept is of practical significance, be cause it is the foremost intention of all clinical efforts to prevent, or at least attenuate the development of secondary sequelae. Primary dam age to nervous elements usually cannot be influenced by treatment. Its prevention is the objective of prophylactic measures. The current volume gathered prominent scientists and clinicians from various fields to pro vide a competent introduction and survey of the various aspects involved in secondary brain damage. It was attempted to provide criteria for the distinction between the primary and secondary phenomena on a morpho logical and functional level, on the basis of the kinetics involved and, most importantly, regarding the different specific manifestations, such as disturbances of microcirculation, aspects of the blood-brain barrier, and of cellular structure and function at a molecular level. Although it was not expected that a grand unifying hypothesis will be reached recon cilable with the many, occasionally opposing views on such a complex subject, nevertheless, the present volume attains an appropriate result. It can best be described as a mosaic of many different pieces which only as an ensemble reflect the current state of the art.
Download or read book Brain Ischemia written by Louis R. Caplan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Professor Caplan has extensively edited the book to shape and organize the contents into a succinct presentation by experts of the basic science and clinical aspects of the topic. The text has been divided into sections: The Brain.- Macroscopic and microscopic molecular aspects of brain ischemia, including pathophysiology, pathology, biochemistry, and clinical measurement.- Blood Vessels.- Their constitution and the pathology and physiology of the endothelium and arterial wall.- Blood Flow.- Its physics, control, rheology, and pathophysiology.- Blood.- The role of the cellular and serological constituents in coagulation and fibrinolysis. - Heart.- Sources of embolism and cardiac changes caused by brain ischemia.- And Epidemiology, Databases, and Trials. Prefatory remarks by Professor Caplan introduce each section. At the end of each section he relates the basic concepts to patient problems in the clinic, integrates the various contributions in the section, and covers other areas not discussed by the individual contributors.
Download or read book Acute Ischemic Stroke written by R. Gilberto González and published by Springer Science & Business Media. This book was released on 2010-10-05 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated second edition of Acute Ischemic Stroke: Imaging and Intervention provides a comprehensive account of the state of the art in the diagnosis and treatment of acute ischemic stroke. The basic format of the first edition has been retained, with sections on fundamentals such as pathophysiology and causes, imaging techniques and interventions. However, each chapter has been revised to reflect the important recent progress in advanced neuroimaging and the use of interventional tools. In addition, a new chapter is included on the classification instruments for ischemic stroke and their use in predicting outcomes and therapeutic triage. All of the authors are internationally recognized experts and members of the interdisciplinary stroke team at the Massachusetts General Hospital and Harvard Medical School. The text is supported by numerous informative illustrations, and ease of reference is ensured through the inclusion of suitable tables. This book will serve as a unique source of up-to-date information for neurologists, emergency physicians, radiologists and other health care providers who care for the patient with acute ischemic stroke.
Download or read book Mechanisms of Secondary Brain Damage in Cerebral Ischemia and Trauma written by Alexander Baethmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: The publication of the Vth International Symposium 1995 on "Mechanisms of Secondary Brain Damage" in Mauls/ltaly is a collection of focused reviews reaching from novel molecular- and cell biological findings to aspects of clinical management in head injury and cerebral ischemia. A specific purpose of these series of meetings introduced in 1984 is for an exchange on problems of mutual interest by international high ranking experts from the basic sciences and related clinical disciplines, such as intensive care medicine, neurology, or neurosurgery. The present volume covers three major areas: (a) Molecular and cell biological mechanisms including inflammation (b) Novel findings on mechanisms and treatment in cerebral ischemia (c) Secondary processes in head injury, regeneration and treatment Molecular-and cell biology is currently attracting attention towards activation of genomic processes associated with the demise of cells referred to as "programmed cell death" and "apoptosis" which, actually, might be distinguished from each other. Thus, the phenomenon of delayed neuronal death in selectively vulnerable brain areas following brief interruption of blood flow is scrutinized as to the contribution of the activation of suicide genes. The physiological role of such a response, among others, is removal of surplus neurons during ontogenesis of the brain. Yet, evidence is accumulating that similar mechanisms playa role in cerebral ischemia, probably also trauma, where nerve-and other cells demonstrate features of apoptosis. Observations on protection of neurons by administration of protein synthesis inhibitors in cerebral ischemia provide more direct support.
Download or read book Mechanisms of Cerebral Hypoxia and Stroke written by G. Somjen and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: The articles and short communications in this volume are based on papers pre sented to the Symposium on Cerebral Hypoxia and Stroke held in Budapest in August of 1987. Besides participants at the meeting, three scientists who were invited but could not attend have also contributed chapters to this volume. A synopsis of the general discussion at the conference and a review chapter conclude this volume. To the readers of this book it will not be news that stroke is a worldwide problem. Efforts to cope with this often devastating condition are worldwide also, as attested by the international membership of the conference. It has been said of oxygen deficiency that it not only stops the machine, it also wrecks the machinery. The paramount question in stroke research is this: why can't the brain be restarted after a hypoxic episode in much the same manner as a motor car can when its gas tank is refilled after it stalled because it ran out of fuel? Participants at the Symposium had been requested in advance of the meeting to especially consider a series of specific questions in relation to this general problem. Among these specific questions were: the mechanism of synaptic blockade in hypoxic brain tissue; the transition from reversible to irreversible arrest of function; the nature of postischemic (delayed) cell death; the possible basic differences in the consequences of hypoxia and ischemia; and actual and potential approaches to the prevention and treatment of cell damage in hypoxia and stroke.
Download or read book Hypothermia and Cerebral Ischemia written by Carolina M. Maier and published by Springer Science & Business Media. This book was released on 2003-10-17 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of the scientific and clinical studies that have led to the resurgence of interest in hypothermia as a neuroprotective strategy in the treatment of stroke and traumatic brain injury. Topics of special importance include intraoperative and intensive care management of hypothermia-treated patients, a critical look at the potential for combining hypothermia with pharmacotherapy, and an update on the latest technological advances that have made hypothermic treatment possible in today's clinical setting.
Download or read book Cerebral Ischemia and Resuscitation written by Avital Schurr and published by CRC Press. This book was released on 1990-09-24 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fascinating monograph is filled with information formerly found only in periodicals and symposia proceedings. Chapters discuss the different models of cerebral ischemia in use today, including their advantages and disadvantages. This one-of-a-kind resource also contains essential chapters on cellular mechanisms of ion and acid-base homeostases, and energy metabolism of the ischemic brain. It reviews the possible role of lipids, free fatty acids, and free radicals. Four chapters are devoted to neurotransmitters and neuroregulators in cerebral ischemia. This extraordinary work also covers aspects of protection against and resuscitation from cerebral ischemia. An extremely informative volume, this book is an absolute must for every student in the field of cerebral ischemia, as well as the clinician or scientist who is already involved with this worldwide problem.
Download or read book Primer on Cerebrovascular Diseases written by K. Michael Welch and published by Academic Press. This book was released on 1997-04-24 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: Primer on Cerebrovascular Diseases is a handy reference source for scientists, students, and physicians needing reliable, up-to-date information on basic mechanisms, physiology, pathophysiology, and medical issues related to brain vasculature. The book consists of short, specific chapters written by international experts on cerebral vasculature, and presents the information in a comprehensive and easily accessible manner. The book also contains valuable information on practical applications of basic research. Presents topics in a comprehensive and accessible format Written by international authorities on cerebral vasculature Provides practical applications for researchers
Download or read book Maturation Phenomenon in Cerebral Ischemia III written by Umeo Ito and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Maturation Phenomenon, described by Ito et al. in 1975 [3) on the basis of his to logical observations in the hippocampus as well as other portions of the cerebral hemisphere, refers to the hours or days of delay in the development of pathological changes in various parameters of ischemic injury following the restoration of blood flow to the ischemic brain. There is a direct relationship between the intensity of ischemic insult and the speed and rate of maturation of ischemic injury, a lesser intensity being associated with slower and less severe development of the lesions. The delayed neuronal death of CAl pyramidal cells of the hippocampus [8) is a classic example. In the cerebral cortex, with increasing intensity of the ischemic insult, the maturation phenomenon of ischemic injuries intensifies, seamlessly, from less exten sive to more extensive disseminated selective neuronal necrosis (DSNN), and then further to cerebral infarction upon reaching a critical threshold [1,2,4,6,7). We also have found that following ischemic insults just under the threshold level required to induce infarction, only disseminated selective neuronal necrosis (DSNN) progresses, while following ischemic insults at the threshold level, initially only DSNN develops, followed by the evolution of a gradually enlarging infarcted focus [5, 7). The reporting of this phenomenon boosted research in the field, as it became evi dent that ischemic damage is not a sudden event, but a process potentially susceptible to therapeutic intervention.
Download or read book The Cerebral Circulation written by Marilyn J. Cipolla and published by Biota Publishing. This book was released on 2016-07-28 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: This e-book will review special features of the cerebral circulation and how they contribute to the physiology of the brain. It describes structural and functional properties of the cerebral circulation that are unique to the brain, an organ with high metabolic demands and the need for tight water and ion homeostasis. Autoregulation is pronounced in the brain, with myogenic, metabolic and neurogenic mechanisms contributing to maintain relatively constant blood flow during both increases and decreases in pressure. In addition, unlike peripheral organs where the majority of vascular resistance resides in small arteries and arterioles, large extracranial and intracranial arteries contribute significantly to vascular resistance in the brain. The prominent role of large arteries in cerebrovascular resistance helps maintain blood flow and protect downstream vessels during changes in perfusion pressure. The cerebral endothelium is also unique in that its barrier properties are in some way more like epithelium than endothelium in the periphery. The cerebral endothelium, known as the blood-brain barrier, has specialized tight junctions that do not allow ions to pass freely and has very low hydraulic conductivity and transcellular transport. This special configuration modifies Starling's forces in the brain microcirculation such that ions retained in the vascular lumen oppose water movement due to hydrostatic pressure. Tight water regulation is necessary in the brain because it has limited capacity for expansion within the skull. Increased intracranial pressure due to vasogenic edema can cause severe neurologic complications and death.
Download or read book Textbook of Stroke Medicine written by Michael Brainin and published by Cambridge University Press. This book was released on 2014-09-11 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully revised throughout, the new edition of this concise textbook is aimed at doctors preparing to specialize in stroke care.
Download or read book Brain Hypoxia and Ischemia written by Gabriel G. Haddad and published by Springer Science & Business Media. This book was released on 2009-01-06 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brain Hypoxia and Ischemia explores the various aspects of cell death and survival that are crucial for understanding the basic mechanisms underlying brain hypoxia and ischemia. Chapters focus on a panorama of issues including the role of ion channels/transporters, mitochondria and apoptotic mechanisms, the roles of glutamate/NMDA, mechanisms in penumbral cells and the importance of intermittent hypoxia and gene regulation under these stressful conditions. The volume explores findings from both mammalian and invertebrate model systems and their applicability to human systems and diseases. Careful consideration is also given to differences in hypoxia and ischemia across development. This volume aims to increase the understanding of these mechanisms and to stimulate research on better diagnosis and treatment of diseases that afflict the brain and potentially other organs when O2 levels are dysregulated. Brain Hypoxia and Ischemia is designed for neuroscientists, clinicians and medical/graduate students for use in both basic research and clinical practice.
Download or read book Stroke E Book written by J. P. Mohr and published by Elsevier Health Sciences. This book was released on 2011-05-13 with total page 1513 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1986 under the editorial direction of Dr. Henry J.M. Barnett, Stroke: Pathophysiology, Diagnosis, and Management continues to provide the dependable, current answers you need to effectively combat the increasing incidence of this disease. Dr. J.P. Mohr, together with new associate editors Philip A. Wolf, James C. Grotta, Michael A. Moskowitz, Marc Mayberg, and Rüdiger von Kummer as well as a multitude of expert contributors from around the world, offer you updated and expanded coverage of mechanisms of action of commonly used drugs, neuronal angiogenesis and stem cells, basic mechanisms of spasm and hemorrhage, prevention of stroke, genetics/predisposing risk factors, and much more, equipping you to understand the latest scientific discoveries and make effective use of the newest approaches to diagnosis and treatment. Gain fresh perspectives and up-to-date insights from the world’s leading authorities on the pathophysiology, diagnosis, and management of stroke. Access the comprehensive, expert clinical guidance you need to recognize the clinical manifestations of stroke, use the latest laboratory and imaging studies to arrive at a diagnosis, and generate an effective medical and surgical treatment plan. Make efficient and accurate diagnoses with the aid of abundant full-color CT images and pathology slides. Stay up to date on hot topics such as mechanisms of action of commonly used drugs, neuronal angiogenesis and stem cells, basic mechanisms of spasm and hemorrhage, prevention of stroke, genetics/predisposing risk factors, and much more.
