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Ventricular Vascular Coupling
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Book Synopsis Ventricular/Vascular Coupling by : Frank C.P. Yin
Download or read book Ventricular/Vascular Coupling written by Frank C.P. Yin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physiologists have long been interested in the interaction, or coupling, between the heart and the vasculature. The early literature consists mainly of phenomenological descriptions of cardiac alterations resulting from specific interventions in the vasculature. Hundreds of studies, for example, describe functional aspects of hypertrophied myocardium associated with the excessive vascular loading produced by various types of experimental hypertension. Recently, the concepts of ventricular/vascular interaction have found important clinical application. The widespread use of vaso dilators and of intraaortic counterpUlsation balloons for unloading an ov erburdened, diseased heart is a prime example. Despite the interest in this field, until as recently as 20 years ago we were not able to describe ventricular or vascular function in a framework suitable for quantitatively expressing the interaction between these two complex systems. Three major developments-description of ventricular function in terms of both the time-varying elastance and the pump function graph and quantification of vascular function in terms of impedance have changed this. These functional descriptions now enable systems en gineers, bioengineers, physiologists, and clinicians to address very specific quantitative aspects of ventricular/vascular interaction and have resulted in a flurry of papers and symposia devoted to this subject.
Book Synopsis Ventricular/vascular Coupling by : Frank C. P. Yin
Download or read book Ventricular/vascular Coupling written by Frank C. P. Yin and published by . This book was released on 1987 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimal Ventricular-arterial Coupling with Respect to Arterial Elastance by : Mark James Schroeder
Download or read book Optimal Ventricular-arterial Coupling with Respect to Arterial Elastance written by Mark James Schroeder and published by . This book was released on 1994 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ventricular-Arterial Coupling Disease by : CAUWENBERGHS
Download or read book Ventricular-Arterial Coupling Disease written by CAUWENBERGHS and published by . This book was released on 2019-02-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ventricular-vascular Coupling and Central Arterial Pulse Pressure by :
Download or read book Ventricular-vascular Coupling and Central Arterial Pulse Pressure written by and published by . This book was released on 2015 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: That this resulted from a change in myocardial contractility was confirmed by local intra-coronary injection of GTN. The final part of the thesis examines the relative contribution of forward and backward pressure waves in hypertension. An elevated cPP in hypertensive compared to normotensive subjects was accounted for primarily by an increased forward pressure wave. That this was due to increased myocardial contractility was confirmed by examining whether the pattern of wave intensity seen in hypertension could be reproduced, in normotensive subjects, by the inotrope dobutamine (when compared to the vasoconstrictor norepinephrine used as a control). This thesis thus provides novel insight into a) regulation of conduit artery tone, and b) pulsatile haemodynamics, highlighting the contribution of left ventricular ejection characteristics in determining pressure augmentation and cPP.
Book Synopsis Modified Single-beat Method for the Estimation of Ventricular-arterial Coupling Ratio in the Right Ventricle by : Nicholas Evan Hobson
Download or read book Modified Single-beat Method for the Estimation of Ventricular-arterial Coupling Ratio in the Right Ventricle written by Nicholas Evan Hobson and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Textbook of Echocardiography for Intensivists and Emergency Physicians by : Armando Sarti
Download or read book Textbook of Echocardiography for Intensivists and Emergency Physicians written by Armando Sarti and published by Springer. This book was released on 2019-06-07 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this superbly illustrated book equips practitioners with all the information that they will require in order to perform echocardiography appropriately and to interpret findings correctly. After clear exposition of fundamentals of the examination technique via both the transthoracic and the transesophageal approach, the functional anatomy of all normal and pathologic thoracic structures as observed on echocardiography is presented in detail. A wide range of basic and advanced applications of echocardiography in the emergency, perioperative, and intensive care settings are then described. A final supplementary section considers further applications of ultrasound in the ICU, such as in patients with respiratory failure, trauma, or venous thrombosis. This edition has been extensively revised and updated and includes entirely new chapters on various techniques and applications. It will be a tremendous aid to current best practice for all intensivists, emergency physicians, and anesthesiologists who intend to use echocardiography and ultrasound for diagnosis and guidance of optimal management in the critically ill.
Book Synopsis Dynamic Arterial-ventricular Coupling by : Francesco Faita
Download or read book Dynamic Arterial-ventricular Coupling written by Francesco Faita and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computer Modeling of Altered Contractility and Arterial Pulse Transmission on Ventricular/vascular Coupling by : John Philip Matonick
Download or read book Computer Modeling of Altered Contractility and Arterial Pulse Transmission on Ventricular/vascular Coupling written by John Philip Matonick and published by . This book was released on 2000 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Ventriculo-arterial Coupling in ST Elevation Myocardial Infarction with Left Ventricular Dysfunction Treated with Levosimendan by : Paolo Trambaiolo
Download or read book Evaluation of Ventriculo-arterial Coupling in ST Elevation Myocardial Infarction with Left Ventricular Dysfunction Treated with Levosimendan written by Paolo Trambaiolo and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of a Stiffened Arterial Tree on Ventricular-arterial Coupling in Healthy and Diseased Hearts by : David Jegger
Download or read book Effects of a Stiffened Arterial Tree on Ventricular-arterial Coupling in Healthy and Diseased Hearts written by David Jegger and published by . This book was released on 2006 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Ventricular-vascular Coupling in the Developing Embryo by : Michael G. Bauman
Download or read book Modeling Ventricular-vascular Coupling in the Developing Embryo written by Michael G. Bauman and published by . This book was released on 1996 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Congenital cardiovascular malformations are one of the major contributors to infant mortality in the United States today. Defects in the cardiovascular system are evident at very early stages in the developing embryo, yet there exists no substantial diagnostic tool(s) for recognizing defects at these early stages. Cardiac morphogensis occurs throughout the pre-innervated period of embryonic development. It is speculated that the flow of blood during the early embryonic stages plays an important role in the development of the cardiovascular system. Blood flow is a possible mechanism for communication between the heart and vasculature, contributing to cardiac development. The objective of this study is to investigate ventricular-vascular coupling across the conotruncus and aortic arches using mathematical models to simulate experimental hemodynamic data from a Stage 21 White Leghorn chick embryo. Lumped-parameter hydraulic models of the embryonic vasculature are tested for their ability to predict experimental data using Least Squares minimization techniques. This research explores the use of linear parametric models as an effective tool in characterizing embryonic hemodynamics."--Abstract.
Book Synopsis Optimal Coupling Between the Left Ventricle and the Arterial System by : Gabriel Noachas Eisenberg
Download or read book Optimal Coupling Between the Left Ventricle and the Arterial System written by Gabriel Noachas Eisenberg and published by . This book was released on 1993 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Snapshots of Hemodynamics by : Nico Westerhof
Download or read book Snapshots of Hemodynamics written by Nico Westerhof and published by Springer Science & Business Media. This book was released on 2006-01-12 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hemodynamics makes it possible to characterize in a quantitative way, the function of the heart and arterial system, thereby producing information about what genetic and molecular processes are of importance for cardiovascular function. Snapshots of Hemodynamics: An Aid for Clinical Research and Graduate Education by Nico Westerhof, Nikos Stergiopulos and Mark I. M. Noble is a quick reference guide designed to help basic and clinical researchers as well as graduate students to understand hemodynamics. The layout of the book provides short and independent chapters that provide teaching diagrams as well as clear descriptions of the essentials of basic and applied principles of hemodynamics. References are provided at the end of each chapter for further reading and reference.
Book Synopsis Stress Echocardiography by : Eugenio Picano
Download or read book Stress Echocardiography written by Eugenio Picano and published by Springer Nature. This book was released on 2023-10-19 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the seventh edition of a long-selling book (first edition 1991) that was translated into Italian, French, Chinese, Portuguese, Spanish, English. In the last ten years, stress echocardiography has exploded in its breadth and variety of applications. From a one-fits-all approach (wall motion by 2D-echo in the patient with known or suspected coronary artery disease), the field has progressed to an omnivorous, next-generation laboratory employing a variety of technologies (from M-Mode to 2D, from pulsed, continuous, color and tissue Doppler to lung ultrasound) on patients covering the entire spectrum of severity (from elite athletes to patients with end-stage heart failure) and ages (from children with congenital heart disease to the elderly with aortic stenosis). This new edition is enriched with over 300 figures, 150 tables and video-clips. In a societal and economic climate of increasing pressure for appropriate, justified and optimized imaging, stress echocardiography offers the great advantages of being radiation-free, relatively low cost, with minimal environmental impact, and with a staggering versatility: we can get more (information) with less (cost and risk). The volume will be a tremendous aid to current best practices for all health operators who intend to use stress echocardiography and ultrasound for diagnosis and guidance of optimal management in their patients.
Book Synopsis The Effect of Hypertonic Saline and Hyperosmotic Dextrose on Cardiac Contractility and Ventricular-vascular Coupling by : Peter David Constable
Download or read book The Effect of Hypertonic Saline and Hyperosmotic Dextrose on Cardiac Contractility and Ventricular-vascular Coupling written by Peter David Constable and published by . This book was released on 1992 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multi-organ Finite Element Modeling of the Human Heart with Ventricular-arterial Interactions by : Sheikh Mohammad Shavik
Download or read book Multi-organ Finite Element Modeling of the Human Heart with Ventricular-arterial Interactions written by Sheikh Mohammad Shavik and published by . This book was released on 2019 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computer heart models with realistic description of cardiac geometry and muscle architecture have advanced significantly over the years. Despite these significant advancements, there are nevertheless, some unresolved issues and aspects that need improvements. The goal of this dissertation was to address some of those issues as well as to develop new computational modeling framework to understand the underlying mechanics in heart failure with preserved ejection fraction (HFpEF) and pulmonary arterial hypertension (PAH). Clinical studies have found that global longitudinal strain is reduced in HFpEF, suggesting that LV contractility is impaired in this syndrome. This finding is, however, contradicted and confounded, respectively, by findings that end-systolic elastance (Ees) and systolic blood pressure (SBP) are typically also increased in HFpEF. To reconcile these issues, we developed and validated a multiscale computational modeling framework consisting of detailed cell‐based descriptors of the cross‐bridge cycling against well‐established organ‐level physiological behaviors. This framework is then used to isolate the effects of HFpEF features in affecting systolic function metrics by quantifying the effects on Ees and myocardial strains due to 1) changes in LV geometry found in HFpEF patients, 2) active tension developed by the tissue (Tref), and 3) afterload. Our study suggests that it is likely that the LV contractility as indexed by the tissue's active tension is reduced in HFpEF patients. Right ventricular assist device (RVAD) has been considered as a treatment option for the end-stage pulmonary arterial hypertension (PAH) patients, but, its effects on biventricular mechanics are, however, largely unknown. To address this issue, we developed an image-based modeling framework consisting of a biventricular finite element (FE) model that is coupled to a lumped model describing the pulmonary and systemic circulations in a closed-loop system. Our results showed that RVAD unloads the RV, improves cardiac output and increases septum curvature, which are more pronounced in the PAH patient with severe RV remodeling. These improvements, however, are also accompanied by an adverse increase in the PA pressure, suggesting that the RVAD implantation may need to be optimized depending on disease progression. While it has long been recognized that bi-directional interaction between the heart and vasculature plays a critical role in the pathophysiological process of HFpEF and PAH, a comprehensive study of this interaction is hampered by a lack of modeling framework capable of simultaneously accommodating high-resolution models of the heart and vasculature. To address this issue, we developed a computational modeling framework that couples FE models of the LV and aorta to simulate ventricular-arterial coupling in the systemic circulation. We show that the model is able to capture the physiological behaviors in both the LV and aorta that are consistent with in vivo measurements. We also showed that the framework can reasonably predict the effects of changes in geometry and microstructural details the two compartments have on each other. The model is extended to accommodate a biventricular FE heart model together with FE models of the aorta and pulmonary artery to simulate the ventricular-vascular interactions in both systemic and pulmonary circulation.
