Download or read book Vortex Formation in the Cardiovascular System written by Arash Kheradvar and published by Springer Science & Business Media. This book was released on 2012-02-01 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex Formation in the Cardiovascular System will recapitulate the current knowledge about the vortex formation in the cardiovascular system, from mechanics to cardiology. This can facilitate the interaction between basic scientists and clinicians on the topic of the circulatory system. The book begins with a synopsis of the fundamentals aspects of fluid mechanics to give the reader the essential background to address the proceeding chapters. Then the fundamental elements of vortex dynamics will be discussed, explaining the conditions for their formation and the rules governing their dynamics. The main equations are accompanied by mathematical models. Cardiovascular vortex formation is first analyzed in physiological, healthy conditions in the heart chambers and in the large arterial vessels. The analysis is initially presented with an intuitive appeal grounded on the physical phenomena and a focus on its clinical significance.In the proceeding chapters, the knowledge gained from either clinical or basic science literature will be discussed. The corresponding mathematical elements will finally be presented to ensure the adequate diligence. The proceeding chapters ensue to the analysis of pathological conditions, when the reader may have developed the ability to recognize normal from abnormal vortex formation phenomenon. Pathological vortex formation represents vortices that develop at sites where normally laminar flow should exist, e.g. stenosis and aneurisms. This analysis naturally leads to the interaction of vortices due to the surgical procedures with respect to prediction of changes in vortex formation. The existing techniques, from medical imaging to numerical simulations, to explore vortex flows in the cardiovascular systems will also be described. The presentations are accompanied by the mathematical definitions can that be understandable for reader without the advanced mathematical background, while an interested reader with more advanced knowledge in mathematics can be referred to references for further quantitative analyses. The book pursues the objective to transfer the fundamental vortex formation phenomena with application to the cardiovascular system to the reader. This book will be a valuable support for physicians in the evaluation of vortex influence on diagnosis and therapeutic choices. At the same time, the book will provide the rigorous information for research scientists, either from medicine and mechanics, working on the cardiovascular circulation incurring with the physics of vortex dynamics.

Download or read book Heart s Vortex written by Ares Pasipoularides and published by PMPH-USA. This book was released on 2009-11 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: This outstanding resource provides a comprehensive guide to intracardiac blood flow phenomena and cardiac hemodynamics, including the developmental history, theoretical frameworks, computational fluid dynamics, and practical applications for clinical cardiology, cardiac imaging and embryology. It is not a mere compilation of the most up-to-date scientific data and relevant concepts. Rather, it is an integrated educational means to developing pluridisciplinary background, knowledge, and understanding. Such understanding allows an appreciation of the crucial, albeit heretofore generally unappreciated, importance of intracardiac blood flow phenomena in a host of multifaceted functional and morphogenetic cardiac adaptations. The book includes over 400 figures, which were prepared by the author and form a vital part of the pedagogy. It is organized in three parts. Part I, Fundamentals of Intracardiac Flows and Their Measurement, provides comprehensive background from many disciplines that are necessary for a deep and broad understanding and appreciation of intracardiac blood flow phenomena. Such indispensable background spans several chapters and covers necessary mathematics, a brief history of the evolution of ideas and methodological approaches that are relevant to cardiac fluid dynamics and imaging, a qualitative introduction to fluid dynamic stability theory, chapters on physics and fluid dynamics of unsteady blood flows and an intuitive introduction to various kinds of relevant vortical fluid motions. Part II, Visualization of Intracardiac Blood Flows: Methodologies, Frameworks and Insights, is devoted to pluridisciplinary approaches to the visualization of intracardiac blood flows. It encompasses chapters on 3-D real-time and "live 3-D" echocardiography and Doppler echocardiography, CT tomographic scanning modalities, including multidetector spiral/helical dataset acquisitions, MRI and cardiac MRA, including phase contrast velocity mapping (PCVM), etc. An entire chapter is devoted to the understanding of post processing exploration techniques and the display of tomographic data, including "slice-and-dice" 3-D techniques and cine-MRI. Part II also encompasses an intuitive introduction to CFD as it pertains to intracardiac blood flow simulations, followed--in separate chapters--by conceptually rich treatments of the computational fluid dynamics of ejection and of diastolic filling. An entire chapter is devoted to fluid dynamic epigenetic factors in cardiogenesis and pre- and postnatal cardiac remodeling, and another to clinical and basic science perspectives, and their implications for emerging research frontiers. Part III contains an Appendix presenting technical aspects of the method of predetermined boundary motion, "PBM," developed at Duke University by the author and his collaborators.

Download or read book Artificial Hearts written by Ming Yang and published by Springer Nature. This book was released on 2020-08-27 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive introduction to artificial hearts, summarizing the latest advances in basic technologies, design, evaluation, and management. Featuring 11 chapters, it discusses the origins of the artificial heart, the mechanisms of heart failure, and the principles of artificial heart technologies. Further, it offers an overview of rotary pumps and volume-displacement pumps, and addresses total artificial hearts. Lastly, the book covers evaluation, selection, therapy management, challenges, and the latest innovations. Given its scope, it is a valuable resource for researchers and technicians in the area of biomedical engineering, as well as surgeons.

Download or read book I of the Vortex written by Rodolfo R. Llinas and published by MIT Press. This book was released on 2002-02-22 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: A highly original theory of how the mind-brain works, based on the author's study of single neuronal cells. In I of the Vortex, Rodolfo Llinas, a founding father of modern brain science, presents an original view of the evolution and nature of mind. According to Llinas, the "mindness state" evolved to allow predictive interactions between mobile creatures and their environment. He illustrates the early evolution of mind through a primitive animal called the "sea squirt." The mobile larval form has a brainlike ganglion that receives sensory information about the surrounding environment. As an adult, the sea squirt attaches itself to a stationary object and then digests most of its own brain. This suggests that the nervous system evolved to allow active movement in animals. To move through the environment safely, a creature must anticipate the outcome of each movement on the basis of incoming sensory data. Thus the capacity to predict is most likely the ultimate brain function. One could even say that Self is the centralization of prediction. At the heart of Llinas's theory is the concept of oscillation. Many neurons possess electrical activity, manifested as oscillating variations in the minute voltages across the cell membrane. On the crests of these oscillations occur larger electrical events that are the basis for neuron-to-neuron communication. Like cicadas chirping in unison, a group of neurons oscillating in phase can resonate with a distant group of neurons. This simultaneity of neuronal activity is the neurobiological root of cognition. Although the internal state that we call the mind is guided by the senses, it is also generated by the oscillations within the brain. Thus, in a certain sense, one could say that reality is not all "out there," but is a kind of virtual reality.

Download or read book Nonlinear analysis and machine learning in cardiology written by Elena Tolkacheva and published by Frontiers Media SA. This book was released on with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hearts of Fire written by Kara Sorensen Psy.D. and published by Xlibris Corporation. This book was released on 2001-10-25 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cult recovery is an awesome and challenging task. Carla's story depicts such a recovery at the most profound levels. Psychotherapy, shamanic journeying, energy healing, and martial arts combine to create a healing paradigm. This compelling story traces one woman's life from the faintest of disturbing memories into the darkness of a cult and beyond. In the process of her healing, she finds hope, spiritual transformation and a new life.

Download or read book Fluid Mechanics for Cardiovascular Engineering written by Gianni Pedrizzetti and published by Springer Nature. This book was released on 2021-10-28 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a guiding thread between the distant fields of fluid mechanics and clinical cardiology. Well rooted in the science of fluid dynamics, it drives the reader across progressively more realistic scenarios up to the complexity of routine medical applications. Based on the author’s 25 years of collaborations with cardiologists, it helps engineers learn communicating with clinicians, yet maintaining the rigor of scientific disciplines. This book starts with a description of the fundamental elements of fluid dynamics in large blood vessels. This is achieved by introducing a rigorous physical background accompanied by examples applied to the circulation, and by presenting classic and recent results related to the application of fluid dynamics to the cardiovascular physiology. It then explores more advanced topics for a physics-based understanding of phenomena effectively encountered in clinical cardiology. It stands as an ideal learning resource for physicists and engineers working in cardiovascular fluid dynamics, industry engineers working on biomedical/cardiovascular technology, and students in bio-fluid dynamics. Written with a concise style, this textbook is accessible to a broad readership, including students, physical scientists and engineers, offering an entry point into this multi-disciplinary field. It includes key concepts exemplified by illustrations using cutting-edge imaging, references to modelling and measurement technologies, and includes unique original insights.

Download or read book A Cure for the Heart ache written by Thomas Morton and published by . This book was released on 1797 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Play text.

Download or read book A Cure for the Heartache a Comedy in Five Acts written by Thomas Morton (Dramatist.) and published by . This book was released on 1805 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Human Heart Cosmic Heart written by Thomas Cowan and published by Chelsea Green Publishing. This book was released on 2016-10-22 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thomas Cowan was a 20-year-old Duke grad—bright, skeptical, and already disillusioned with industrial capitalism—when he joined the Peace Corps in the mid-1970s for a two-year tour in Swaziland. There, he encountered the work of Rudolf Steiner and Weston A. Price—two men whose ideas would fascinate and challenge him for decades to come. Both drawn to the art of healing and repelled by the way medicine was—and continues to be—practiced in the United States, Cowan returned from Swaziland, went to medical school, and established a practice in New Hampshire and, later, San Francisco. For years, as he raised his three children, suffered the setback of divorce, and struggled with a heart condition, he remained intrigued by the work of Price and Steiner and, in particular, with Steiner’s provocative claim that the heart is not a pump. Determined to practice medicine in a way that promoted healing rather than compounded ailments, Cowan dedicated himself to understanding whether Steiner’s claim could possibly be true. And if Steiner was correct, what, then, is the heart? What is its true role in the human body? In this deeply personal, rigorous, and riveting account, Dr. Cowan offers up a daring claim: Not only was Steiner correct that the heart is not a pump, but our understanding of heart disease—with its origins in the blood vessels—is completely wrong. And this gross misunderstanding, with its attendant medications and risky surgeries, is the reason heart disease remains the most common cause of death worldwide. In Human Heart, Cosmic Heart, Dr. Thomas Cowan presents a new way of understanding the body’s most central organ. He offers a new look at what it means to be human and how we can best care for ourselves—and one another.

Download or read book Advances in Cardiac Imaging and Heart Failure Management written by Matteo Cameli and published by Frontiers Media SA. This book was released on 2022-11-25 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Genetics of Cardiac Electrophysiology written by C. Berul and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The molecular basis for atrial fibrillation continues to be largely unknown, and therapy remains unchanged, aimed at controlling the heart rate and preventing systemic emboli with anticoagulation. Familial atrial fibrillation is more common than previously suspected. While atrial fibrillation is commonly associated with acquired heart disease, a significant proportion of individuals have early onset without other forms of heart disease, referred to as "lone" atrial fibrillators. It is also well recognized that atrial fibrillation occurs on a reversible or functional basis, without associated structural heart disease, such as with hyperthyroidism or of atrial fibrillation following surgery. It remains to be determined what percentage in these individuals is familial or due to a genetic predisposition. Mapping the locus for familial atrial fibrillation is the first step towards the identification of the gene. Isolation of the gene and subsequent identification of the responsible molecular genetic defect should provide a point of entry into the mechanism responsible for the familial form and the common acquired forms of the disease and eventually provide more effective therapy. We know that the ionic currents responsible for the action potential of the atrium is due to multiple channel proteins as is electrical conduction throughout the atria. Analogous to the ongoing genetic studies in patients with familial long QT syndrome, it is highly likely that defects in each of these channel proteins will be manifested in familial atrial fibrillation.

Download or read book Mechano Calcium Mechano Electric and Mechano Metabolic Feedback Loops Contribution to the Myocardium Contraction in Health and Diseases written by Leonid Katsnelson and published by Frontiers Media SA. This book was released on 2021-06-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heart Replacement written by Tetsuzo Akutsu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 6th International Symposium on Artificial Heart and Assist Devices met in Tokyo in July 1996, bringing together researchers and specialists from around the world. The symposiums proceedings in this volume comprise papers from nine sessions, each opening with contributions by leading scientists: TAH, heart transplantation, biomaterials, VAS, clinical application, pathophysiology, engineering, new approaches, and special sessions. Of special note is the inclusion, for the first time, of pathophysiology related to clinical use of assist devices. The clinical application section includes a paper by Dr. Michael DeBakey on the progress made in recent years. With descriptions of the scientific exhibition, accompanied by photographs of all artificial heart devices and systems displayed by major laboratories and manufacturers, Artificial Heart 6 presents the latest information on developments in the field of artificial heart, biomaterials, and heart transplantation.

Download or read book Eyes and Hearts written by Buster "Old Eagle" Hays and published by Lulu.com. This book was released on with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Transaction in Hearts written by Edgar Saltus and published by . This book was released on 1889 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Heart and Circulation written by Branko Furst and published by Springer Nature. This book was released on 2019-11-27 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively revised second edition traces the development of the basic concepts in cardiovascular physiology in light of the accumulated experimental and clinical evidence. It considers the early embryonic circulation, where blood circulation suggests the existence of a motive force, tightly coupled to the metabolic demands of the tissues. It proposes that rather than being an organ of propulsion, the heart, serves as an organ of control, generating pressure by rhythmically impeding blood flow. New and expanded chapters cover the arterial pulse, circulation in the upright posture, microcirculation and functional heart morphology. Heart and Circulation offers a new perspective for deeper understanding of the human cardiovascular system. It is therefore a thought-provoking resource for cardiologists, cardiac surgeons and trainees interested in models of human circulation.